The non-destructive desulfurization of aromatic structures is crucial for the high-value utilization of FCC slurry oil.Hydrodesulfurization causes aromatic saturation,impairing the suitability of slurry oil as needle ...The non-destructive desulfurization of aromatic structures is crucial for the high-value utilization of FCC slurry oil.Hydrodesulfurization causes aromatic saturation,impairing the suitability of slurry oil as needle coke feedstock.Therefore,developing methods capable of selective desulfurization while preserving aromatics is essential.Herein,we address the critical challenges impeding the application of oxidative desulfurization(ODS)to slurry oil,specifically its complex composition,high sulfur content,prohibitively high viscosity,and inefficient oil-water interfacial mass transfer.An innovative ODS strategy based on biphasic interface regulation was proposed.By constructing a catalytic system through the combination of polyoxometalate and organic cationic modifiers to stabilize the oil-water interface,enhanced mass transfer efficiency was achieved.These catalysts function as surfactant-like homogeneous catalysts during H2O2 mediated oxidation,while enabling rapid separation after reaction.Systematic model system studies identified catalysts with exceptional sulfur-oxidation selectivity,operating via dynamic peroxo-species formation from terminal oxygen of W=O activation by superoxide radicals.Deployment in real slurry oil under Bayesian-optimized conditions reduced sulfur content from 1.60 wt%to 0.34 wt%while completely preserving the core feedstock components 3-4 ring aromatic components and maintaining 86.4%slurry recovery.This research provides a technologically innovative and practically viable pathway for desulfurization of slurry oils with remaining high aromatic contents.展开更多
SrTiO3-based thermoelectric ceramics show potential for high-temperature energy harvesting but face challenges from inefficient carrier transport and high thermal conductivity.This work presents a multi-scale struc...SrTiO3-based thermoelectric ceramics show potential for high-temperature energy harvesting but face challenges from inefficient carrier transport and high thermal conductivity.This work presents a multi-scale structural engineering strategy to address these challenges,fabricating textured Sr0.875La0.1Ti O3m Ti/10 wt%Bi2O3(SLTTB)ceramics via plate-like SrTiO3templates.Through this design,the ceramics form a unique core-shell architecture,where template seeds act as growth cores for epitaxially alignedoriented grains,forming coherent interfaces with a precipitate-rich interlayer and a precipitate-free shell.In the interlayer,uniformly distributed“peanut-shaped”Bi-Ti_nO2n-1nanoparticle pairs enhance electron mobility and phonon scattering.The hierarchical microstructure creates multiscale coherent interfaces that reduce electron grain boundary scattering,enabling preferential electron transport pathways parallel to the casting direction.This architecture enables the decoupling of electrical and thermal properties,with a power factor reaching 1815μW/m/K2at 1073 K with thermal conductivity suppressed by interfacial and nanoparticle scattering.Consequently,the SLTTB textured ceramic achieves a notable ZT of 0.64 at 1073 K,a significant enhancement over conventional counterparts.This work demonstrates a multi-scale structural strategy integrating template-induced texture,core-shell design,and nanoscale interface modulation to decouple the electrical and thermal properties of SrTiO3-based materials,and provides a roadmap for tailoring the electrical-thermal transport properties of thermoelectric textured ceramics.展开更多
Stability of base-exposed backfill roof in underhand drift-and-fill mining is crucial for the safety of those working beneath.Given the commonly used primary-and-secondary mining sequence,interfaces are formed between...Stability of base-exposed backfill roof in underhand drift-and-fill mining is crucial for the safety of those working beneath.Given the commonly used primary-and-secondary mining sequence,interfaces are formed between adjacent filled drifts,which can weaken the integrity of the backfill roof.These interfaces also lead to two common drift layouts:aligned drifts and staggered drifts.However,less attention has been paid to the interfaces and the two drift layouts were not adequately distinguished in previous studies.In this paper,the interfaces between filled drifts were firstly considered to investigate the stability of backfill roof.Failure modes and strength requirements of backfill roof in aligned and staggered drifts are comprehensively investigated by FLAC3D,with a focus on considerations of varied shear parameters of the interfaces.Results show that failure modes in aligned drifts transition from block sliding to top caving,bottom caving or sloughing as the interface cohesion increases from zero to at least half of the backfill cohesion.Further increases in interface cohesion allow aligned drifts to behave as if there are no interfaces between them.The critical stability conditions of backfill roof in aligned drifts were mostly determined by the interface strength instead of the backfill strength.However,the stability of backfill roof in staggered drifts is barely affected by the interface strength.The outcomes are expected to provide references for mining engineers to optimize drift layouts and perform cost-effective backfill roof strength design at mines using underhand drift-and-fill mining method.展开更多
While 2D/3D heterostructures are widely employed to improve the stability of perovskite optoelectronic devices,their effectiveness is fundamentally governed by the crystallinity of the interfacial structure -a factor ...While 2D/3D heterostructures are widely employed to improve the stability of perovskite optoelectronic devices,their effectiveness is fundamentally governed by the crystallinity of the interfacial structure -a factor often overlooked.Disordered interfaces exhibit thermodynamic metastability,where ion diffusion induces sequential phase transitions from low-n to high-n phases.Here,we construct atomically ordered 2D/3D interfaces using phase-pure 2D perovskite capping layers,which reduce the interfacial phase transition rate by 95%and effectively suppress ion migration.As a result,devices exhibit outstanding operational stability,retaining over 99%of their initial power conversion efficiency after 1500 h of continuous operation,along with excellent thermal durability at 85℃.These findings identify interfacial order as a critical parameter for regulating ion dynamics and phase behavior,providing a robust design principle for achieving high-efficiency,long-lifetime perovskite technologies.展开更多
Sodium metal batteries(SMBs)represent a promising alternative for large-scale energy storage and lowspeed electric vehicles,with resource-sustainable and cost-effective characteristics.However,its practical applicatio...Sodium metal batteries(SMBs)represent a promising alternative for large-scale energy storage and lowspeed electric vehicles,with resource-sustainable and cost-effective characteristics.However,its practical application is hindered by the high reactivity of sodium metal,interfacial and structural instability,and fire safety risks.Herein,a poly(1,3-dioxolane)(PDOL)crosslinked quasi-solid-state electrolyte(TPQSE)with fire extinguishing property and superior interface compatibility with sodium(Na)anodes and Na3V2(PO4)3(NVP)cathodes is prepared via in situ polymerization at room temperature(RT),utilizing trimethylolpropane triglycidyl ether(TTE)as a crosslinker in coordination with ethoxy(pentafluoro)cyclotriphosphazene(PFPN).The crosslinked network of TPQSE and the distinct solvation properties of TPDOL and PFPN facilitate Na-ion desolvation while enhancing antioxidant stability of TPQSE.Moreover,multifunctional PFPN improves fire safety through condensed-phase dense char layer formation and gas-phase free radical capturing.It also constructs uniform,dense,and inorganic-rich interphases between electrodes and electrolytes,strengthening interfacial stability.Consequently,the prepared electrolyte exhibits high ionic conductivity(2.109 mS cm-1at RT),high Na+transference number(0.570),and extended electrochemical window to 4.805 V.The Na‖TPQSE‖Na symmetric cell presents impressive cycling stability over 4510 h,and the Na‖TPQSE‖NVP cell displays outstanding rate capability and stable long-term cycling(≥2300 cycles).This work provides a promising approach for developing safe and high-performance quasi-solid-state sodium metal batteries.展开更多
In view of the frequent deterioration of molten steel quality during the tundish filling process,the slag-steel-air interface behavior in a tundish,including liquid level fluctuation,slag eyes,slag entrapment and air ...In view of the frequent deterioration of molten steel quality during the tundish filling process,the slag-steel-air interface behavior in a tundish,including liquid level fluctuation,slag eyes,slag entrapment and air suction during the steady-state casting and filling process,was comparatively studied through physical modeling and mathematical simulation methods.During the filling process,the liquid surface forms a large-size slag eye under the impact of molten steel from a ladle shroud,which simultaneously results in a violent fluctuation of liquid level.Concurrently,the liquid flow entrains the air phase and the cover slag into the tundish impact zone,resulting in slag entrapment and air suction.At filling flow rates of 1.5Q,2.0Q,and 2.5Q(Q is the flow rate under steady-state casting),the amount of slag entrapped is 8.39×10-5,9.65×10-5,and 12.7×10-5m3,respectively,while the volume of air aspirated is 0.84×10-4,1.47×10-4,and 2.01×10-4m3,indicating that slag entrapment and air suction intensify with an increase in tundish filling flow rate.Flow field characterization identifies eddy currents in the impact zone as the primary driver of the above phenomena.Proper filling process parameters were proposed to improve the steel quality during the tundish filling.展开更多
在艺术与科技研究领域中,针对目前大部分现有公开数据集过于老旧而导致已有研究方法在实际GUI(Graphical User Interface)检测中因界面所特有的组件种类多样、背景复杂的情况,同时因高分辨率显示器使得部分组件更小更密集从而导致检测...在艺术与科技研究领域中,针对目前大部分现有公开数据集过于老旧而导致已有研究方法在实际GUI(Graphical User Interface)检测中因界面所特有的组件种类多样、背景复杂的情况,同时因高分辨率显示器使得部分组件更小更密集从而导致检测效率不高和检测精度瓶颈等问题,该文依托太原师范学院智能科技与艺术创新科研平台自行构建GUI数据集并基于RT-DETR模型进行改进提出EM-DETR,构建面向GUI组件检测任务的实时目标检测网络创新性优化策略。为突破低质量样本与计算效率的双重限制,创新构建了引入增强定位敏感区域的表达能力模块的EMViT轻量化骨干网络;与此同时,为改善最近邻插值法可能出现细节丢失、锯齿状边缘和图像失真等问题,引入DySample上采样算子;最后为了解决低质量样本回归难题,设计基于WIoUv3的动态梯度分配策略。本实验在太原师范学院智能科技与艺术创新科研平台提供的GUI数据集中验证了检测精度及效率平衡方面的有效性。实验结果表明,检测平均精度(mAP)达到了89.8%,相较于原始RT-DETR提升了9.53百分点,同时,EM-DETR在检测速度上也表现出色,在GUI组件检测这一细分场景下,首次将RT-DETR架构的精度提高到可落地水平,在保持可接受的实时性同时大大提高了检测正确率。现已将其应用到教育部产学合作协同育人公示企业山西赛迩教育科技有限公司中的产品研发环节,取得良好效果。展开更多
Invasive as well as non-invasive neurotechnologies conceptualized to interface the central and peripheral nervous system have been probed for the past decades,which refer to electroencephalography,electrocorticography...Invasive as well as non-invasive neurotechnologies conceptualized to interface the central and peripheral nervous system have been probed for the past decades,which refer to electroencephalography,electrocorticography and microelectrode arrays.The challenges of these mentioned approaches are characterized by the bandwidth of the spatiotemporal resolution,which in turn is essential for large-area neuron recordings(Abiri et al.,2019).展开更多
Wearable and deformable electronics are becoming increasingly essential components of modern healthcare and daily life.To power such devices,flexible electrochemical energy storage(FEES)plays a critical role.The pract...Wearable and deformable electronics are becoming increasingly essential components of modern healthcare and daily life.To power such devices,flexible electrochemical energy storage(FEES)plays a critical role.The practical performance of FEES is dominated by charge and mass transfer at the electrodeelectrolyte interface,similar to many rigid battery technologies.However,a unique challenge for FEES is the durability of this interface under deformation.Herein,we present the first comprehensive review of the interface physics,unveiling the crucial role of interface adhesion in the mechanical endurance of FEES.By bridging adhesion physics,material chemistry,and device mechanics,adhesion reinforcement strategies are comprehensively discussed and quantitatively compared,providing multi-scale mechanisms for optimizing FFES interface-from nanoscale bond engineering to microscale surface topology,mechanical interlocking,and macroscale device design.Further,inspired by the synergetic effect of adhesion mechanisms,we propose potential research directions for durable electrode-electrolyte interfaces under dynamic deformation.We also revisit the evaluation of flexibility and electrochemical performance,proposing an application-driven bending index for device assessment.These insights on electrode-electrolyte interface physics of FEES will facilitate the flourishing future of flexible devices.展开更多
Introducing Ti2AlC particles into TiAl alloys can effectively improve their strength,but this can also lead to stress concentration at the interface,resulting in the reduction of ductility.Therefore,Mn is adopted t...Introducing Ti2AlC particles into TiAl alloys can effectively improve their strength,but this can also lead to stress concentration at the interface,resulting in the reduction of ductility.Therefore,Mn is adopted to synergistically improve the strength and ductility of the Ti2AlC/TiAl composite through solid solution and interface manipulation.The first-principles calculation shows the Ti-Mn bonds are formed at the Ti2AlC/TiAl interface after Mn doping,characterized primarily by metallic bonds with some covalent bonding.This combination preserves strength while enhancing ductility.Then,Ti2AlC/TiAl-Mn composite is prepared.The Ti2AlC,with an average size of 1.6μm,is uniformly distributed within the TiAl matrix.Mn doping reduces the lamellar colony size and lamellar thickness by 25.1%and 27.4%,respectively.A small quantity of Mn accumulates at the boundaries of the lamellar colonies.The Mn content must be controlled to avoid segregation,which may negatively impact performance.The yield stress,ultimate compressive stress,fracture strain,and product of strength and plasticity of the Ti2AlC/TiAl-Mn composite have been increased by 5.5%,11.5%,10.4%,and 23.0%,respectively,compared to those of the Ti2AlC/TiAl composite.The enhancement in strength is due to the combined effects of grain refinement,solid solution of Mn,and twining strengthening.Grain refinement and twin strengthening also can reduce stress concentration and improve ductility.In addition,at the electronic level,the Ti-Mn bond formed at the interface is contributed to the improvement of ductility.展开更多
Nanocomposite technology is an effective strategy to enhance the performance of capacitive deionization(CDI).However,the poor interfacial interactions between the nanofillers and matrices limit their further optimizat...Nanocomposite technology is an effective strategy to enhance the performance of capacitive deionization(CDI).However,the poor interfacial interactions between the nanofillers and matrices limit their further optimization and commercial application.Here,we developed an interface engineering strategy to prepare a high-strength and high-toughness fiber electrode based on holey reduced graphene oxide(HRGO)and carboxylated carbon nanotubes(CCNT)through introducing borate bonds as bridging interactions.The interface interaction between HRGO and CCNT is significantly enhanced by the formation of dynamic cross-linked borate bonds,which not only effectively preventπ-πstacking and construct hierarchical ion transport channels to enhance ion transport efficiency and reaction kinetics,but also significantly improve mechanical stability and long-cycle performance based on self-healing properties in the fiber electrode.This configuration showed remarkably enhanced desalination capacity(30.6 mg g-1)and higher desalination rate(6.12 mg g-1 min-1),with cycling performance exceeding 90%,which exceeds previously reported values.Density functional theory calculations further reveal the mechanism by which the nanocomposite interface affects the CDI performance.Based on this excellent performance,we established a recirculating desalination hydrogen production system consisting of multiple CDI units connected in series with a hydrogen production unit.This effective strategy opens a new way to optimize the nanocomposite interfaces and achieve efficient electrochemical reactions.展开更多
Li2CO3 was introduced into LiPF6-based electrolytes and the electrolytes were stored at 40°C.Nuclear magnetic analysis of electrolytes and X-ray diffraction characterization of reaction residues demonstr...Li2CO3 was introduced into LiPF6-based electrolytes and the electrolytes were stored at 40°C.Nuclear magnetic analysis of electrolytes and X-ray diffraction characterization of reaction residues demonstrate the formation of LiPO2F2 and LiF during storage.This reformulated electrolyte boosts lifespan and Coulombic efficiency(CE)in Li||Li and Li||Cu cells,with Li||Li cells stably cycling for>800 h and 300 h at 0.5 mA/cm2 and 1.0 mA/cm2,respectively.Moreover,with the optimal content of Li2CO3,the CE of the reformulated electrolyte(91.56%)is greatly improved compared to that of the standard electrolyte(81.99%).The compatibility and enhanced rate performance of the reformulated electrolyte are also exhibited in Li||NCM full cells with a moderately high mass loading of 9.6 mg/cm2.展开更多
Ultra-fine sizes and high thermal stability are often mutually exclusive for nanocrystalline(NC)materials because the high grain boundary(GB)energy of nanograins provides a large driving force for grain coarsening.All...Ultra-fine sizes and high thermal stability are often mutually exclusive for nanocrystalline(NC)materials because the high grain boundary(GB)energy of nanograins provides a large driving force for grain coarsening.Alloying is a classical strategy for stabilizing the microstructure of NC materials.However,the stabilization effects of alloying on NC materials typically rely on the segregation of solute atoms at GBs,which imposes restrictions on the selection of possible alloy systems.In this study,it is revealed experimentally and corroborated theoretically that the interface energies can be continuously regulated by simply manipulating the alloy composition in simple solid-solution alloy systems,enabling the control of the ultra-fine sizes and thermal stability of the alloys without GB segregation.In a model system of NC Au(Cu)-SiO2films,the dissolved Cu in Au can be used as a very accurate tool to tailor the interface energies of NC Au(Cu)-SiO2film,leading to ultra-fine(below 2 nm)Au(Cu)nanoparticles with exceptional thermal stability.Such Cu-induced grain refinement and thermal stabilization effects are supported by interface thermodynamic calculations.This study thus provides an alloying stabilization strategy without GB segregation,which broadens the scope for developing thermally stable NC alloy systems.展开更多
The phase composition at the slag-iron interface and the distribution behavior of titanium,vanadium,chromium and silicon between hot metal and Ti-bearing electric furnace slag were thoroughly explored.The basicity ran...The phase composition at the slag-iron interface and the distribution behavior of titanium,vanadium,chromium and silicon between hot metal and Ti-bearing electric furnace slag were thoroughly explored.The basicity range for the anosovite phase region was defined by using a phase diagram and a minimum smelting temperature was set at 1540℃.Thermodynamic calculations demonstrate that the activities of TiO2 and SiO2 in the slag decrease with increasing basicity,while those of V2O3 and Cr2O3 increase.Similarly,the activities of[Ti]and[Si]in the molten metal decrease,while those of[V]and[Cr]rise with increasing basicity.As basicity increases,the distribution ratios,LTi and LSi decrease,whereas LV and LCr increase.Significantly,the recovery efficiencies of vanadium and titanium are improved with higher basicity.The primary phases identified in the slag include anosovite,diopside,and titanium spinel.However,when the basicity exceeds 0.8,the formation of the perovskite phase becomes less favorable,suggesting that basicity should be maintained at or below 0.8.展开更多
Surface passivation via two-dimensional(2D)perovskite has emerged as a promising strategy to enhance the performance of perovskite solar cells(PSCs)due to the effective compensation of interfacial states.However,the i...Surface passivation via two-dimensional(2D)perovskite has emerged as a promising strategy to enhance the performance of perovskite solar cells(PSCs)due to the effective compensation of interfacial states.However,the in situ grown 2D perovskite passivation layers typically comprise a mixture of multiple dimensionalities at the interface,where band alignment has only been portrayed qualitatively and empirically.Herein,the interface states for precisely phase-tailored 2D perovskite passivated PSCs are quantitatively investigated.In comparison to traditional passivation molecules,2D perovskite layers based on 4-trifluoromethyl-phenylethylammonium iodide(CF3PEAI)exhibit an increased work function,introducing desirable downward band bending to eliminate the Schottky Barrier.Furthermore,precisely phase-tailored 2D layers could modulate the interface trap density and energetics.The n=1 film delivers optimal performance with a hole extraction efficiency of 95.1%.The optimized n-i-p PSCs in the two-step method significantly improve PCE to 25.40%,along with enhanced photostability and negligible hysteresis.It highlights that tailoring in the composition and phase distribution of the 2D perovskite layer could modulate the interface states at the 2D/3D interface.展开更多
Weak rock-concrete interfaces significantly affect the stability of underground supporting structures.This study aims to investigate the effects of interface inclination on the creep behavior and failure mechanisms of...Weak rock-concrete interfaces significantly affect the stability of underground supporting structures.This study aims to investigate the effects of interface inclination on the creep behavior and failure mechanisms of composite specimens.Seven rock-concrete composite specimens with different inclination angles under hydrothermal curing at 60℃were prepared,and uniaxial and graded loading creep tests were completed.The results show that with increasing interface inclination,the compressive strength of the composite specimens initially decreases and then increases,with the minimum strength observed at inclinations between 60°and 75°.Three typical failure patterns were identified:axial failure,composite failure,and interface failure.The creep failure strength exceeded the uniaxial compressive strength,indicating improved time-dependent deformation resistance under elevated temperature curing.The instantaneous strain initially decreases and then increases as the interface inclination angle grows.Compared to 0°inclination,specimens with 45°,60°,75°,and 90°inclinations exhibited reductions in instantaneous strain of 2.64%,18.84%,23.29%,and 0.73%,respectively.The steady-state creep rate and creep ratio exhibited a decrease-stabilization-increase trend with increasing stress levels.Creep strain increased with increasing stress levels for all inclinations,with a sharp increase near the failure stage.A nonlinear constitutive model considering interface inclination and creep damage was developed based on damage theory.A nonlinear damage-based constitutive model incorporating interface inclination effects was developed,and its theoretical predictions closely matched the experimental data in all creep stages.These findings provide a quantitative understanding of creep failure mechanisms in rock-concrete interfaces and provide practical references for enhancing the safety of underground support systems.展开更多
This paper investigates the “brush-like”deformation phenomenon of the contact interface at the bolt-hole during the interference-fit installation of high-locking bolts under static loading in CFRP connection structu...This paper investigates the “brush-like”deformation phenomenon of the contact interface at the bolt-hole during the interference-fit installation of high-locking bolts under static loading in CFRP connection structures.An innovative theoretical model is proposed to predict axial installation force,specifically designed for moderate interference-fit.This model is based on the “brush-like”deformation of the hole wall,with the axial installation force predicted through force analysis and theoretical calculations,effectively overcoming the limitations of prior models that idealized the contact interface at the bolt-hole.The predictions generated by this theoretical model align closely with experimental data,confirming its efficacy in accurately forecasting the curve of installation force for interferencefit bolts during the static installation within the moderate interference-fit range.Additionally,a comprehensive analysis of the relationship between deformation of the hole wall and curves of installation force across small,moderate,and large interference-fit levels are presented.It is demonstrated that the degree of deformation within the moderate interference-fit range is more suitable than that in the small and large interference-fit ranges,making it a reliable alternative for installation force tests within this range during static installation.The moderate interference-fit domain[1.00%,1.24%]is established as a validated and optimal range of interference-fit bolts for the static installation.展开更多
Bessel beams,often referred to as“nondiffractive”light,have been successfully applied in numerous fields.In this study,we integrated a Bessel beam as the illumination source into a Raman spectrometer to enhance the ...Bessel beams,often referred to as“nondiffractive”light,have been successfully applied in numerous fields.In this study,we integrated a Bessel beam as the illumination source into a Raman spectrometer to enhance the detection of homogeneous phases and interfaces.By simulating optical path systems,we optimized the setup to fully utilize the multi-pixel array and maximize detection sensitivity.Compared to a conventional Gaussian-beam Raman spectrometer in the 90°-scattered configuration,the upgraded Raman spectrometer employing a Bessel-like beam demonstrated a nearly 6-fold improvement in sensitivity.Additionally,it significantly suppressed background scattering interferences in the low-frequency range,thus enhancing the clarity and accuracy of spectral data.Furthermore,the capability of this spectrometer for real-space Raman imaging of heterogeneous phase interfaces was verified.This advancement not only improves the sensitivity and precision of Raman measurements but also expands the potential applications of Raman spectroscopy in studying complex systems,such as interfaces and phase boundaries,with high spatial and spectral resolution.展开更多
Glycerol oxidation reaction has got lots of attention in an electrocatalytic system of simultaneous hydrogen production and valuable chemicals generation.However,the lack of electrochemical dehydrogenation capability ...Glycerol oxidation reaction has got lots of attention in an electrocatalytic system of simultaneous hydrogen production and valuable chemicals generation.However,the lack of electrochemical dehydrogenation capability of the active phase is hard to deliver a large current density at a low potential.Furthermore,high selectivity of products is also still far from being completed due to the adsorption-desorption disequilibrium of glycerol and the obtained products,reducing the economic feasibility and limiting the practical application.Here,we propose a strategy to boost the electrocatalytic glycerol oxidation through electron-deficient Ni sites induced by electron transfer of heterojunction interface.Taking Ni3S2/Cu2S as a pre-catalysts,we demonstrate that the electron-deficient Ni site can favor the dehydrogenation of the active phase to facilitate the rapid transformation of Ni2+/Ni3+in the electrooxidation process of glycerol.Furthermore,electron deficient Ni sites balance competitive adsorption of active species,improving the activity and selectivity of glycerol oxidation.As expected,the electrocatalysts exhibit selectivity of 93.3%for formate at the 1.35 V,and require only 1.45 V to drive an industrial-level current densities of 600 mA/cm2.This work provides valuable insights into constructing highly active and selective electrocatalysts for organic electrosynthesis in hybrid water electrolysis.展开更多
For decades,refining grain or twin structures at the nanoscale has been the cornerstone strategy for enhancing metal strength[1].However,when structural dimensions shrink to below~10 nm,this approach hits an insurmoun...For decades,refining grain or twin structures at the nanoscale has been the cornerstone strategy for enhancing metal strength[1].However,when structural dimensions shrink to below~10 nm,this approach hits an insurmountable bottleneck,that is,material softening triggered by interface instability,which prevents further strength improvement[2-5].Now,writing in science,Li and colleagues introduce a novel strengthening approach based on nanoscale negative excess-energy interfaces(NEIs)that elevates the mechanical performance of nickelmolybdenum(Ni-Mo)alloys to an unprecedented level[6].展开更多
摘要The non-destructive desulfurization of aromatic structures is crucial for the high-value utilization of FCC slurry oil.Hydrodesulfurization causes aromatic saturation,impairing the suitability of slurry oil as needle coke feedstock.Therefore,developing methods capable of selective desulfurization while preserving aromatics is essential.Herein,we address the critical challenges impeding the application of oxidative desulfurization(ODS)to slurry oil,specifically its complex composition,high sulfur content,prohibitively high viscosity,and inefficient oil-water interfacial mass transfer.An innovative ODS strategy based on biphasic interface regulation was proposed.By constructing a catalytic system through the combination of polyoxometalate and organic cationic modifiers to stabilize the oil-water interface,enhanced mass transfer efficiency was achieved.These catalysts function as surfactant-like homogeneous catalysts during H2O2 mediated oxidation,while enabling rapid separation after reaction.Systematic model system studies identified catalysts with exceptional sulfur-oxidation selectivity,operating via dynamic peroxo-species formation from terminal oxygen of W=O activation by superoxide radicals.Deployment in real slurry oil under Bayesian-optimized conditions reduced sulfur content from 1.60 wt%to 0.34 wt%while completely preserving the core feedstock components 3-4 ring aromatic components and maintaining 86.4%slurry recovery.This research provides a technologically innovative and practically viable pathway for desulfurization of slurry oils with remaining high aromatic contents.
基金supported by National Natural Science Foundation of China(Nos.52272123,52072301,12504037)the Outstanding Scholar Foundation for Technology Innovation of Shaanxi Province(2024)+3 种基金the National Key R&D Program of China(No.2022YFB3504901)Natural Science Basic Research Program of Shaanxi Province(No.2025JC-YBMS-467)Guangxi Science and Technology Plan Project(No.AB22035043)the‘111’Project(No.B20028)。
摘要SrTiO3-based thermoelectric ceramics show potential for high-temperature energy harvesting but face challenges from inefficient carrier transport and high thermal conductivity.This work presents a multi-scale structural engineering strategy to address these challenges,fabricating textured Sr0.875La0.1Ti O3m Ti/10 wt%Bi2O3(SLTTB)ceramics via plate-like SrTiO3templates.Through this design,the ceramics form a unique core-shell architecture,where template seeds act as growth cores for epitaxially alignedoriented grains,forming coherent interfaces with a precipitate-rich interlayer and a precipitate-free shell.In the interlayer,uniformly distributed“peanut-shaped”Bi-Ti_nO2n-1nanoparticle pairs enhance electron mobility and phonon scattering.The hierarchical microstructure creates multiscale coherent interfaces that reduce electron grain boundary scattering,enabling preferential electron transport pathways parallel to the casting direction.This architecture enables the decoupling of electrical and thermal properties,with a power factor reaching 1815μW/m/K2at 1073 K with thermal conductivity suppressed by interfacial and nanoparticle scattering.Consequently,the SLTTB textured ceramic achieves a notable ZT of 0.64 at 1073 K,a significant enhancement over conventional counterparts.This work demonstrates a multi-scale structural strategy integrating template-induced texture,core-shell design,and nanoscale interface modulation to decouple the electrical and thermal properties of SrTiO3-based materials,and provides a roadmap for tailoring the electrical-thermal transport properties of thermoelectric textured ceramics.
基金supported by Deep Earth Probe and Mineral Resources Exploration-National Science and Technology Major Project(Grant No.2024ZD1003705)the Beijing Nova Program(Grant No.20220484057)support from China Scholarship Council under Grant CSC No.202110300001.
摘要Stability of base-exposed backfill roof in underhand drift-and-fill mining is crucial for the safety of those working beneath.Given the commonly used primary-and-secondary mining sequence,interfaces are formed between adjacent filled drifts,which can weaken the integrity of the backfill roof.These interfaces also lead to two common drift layouts:aligned drifts and staggered drifts.However,less attention has been paid to the interfaces and the two drift layouts were not adequately distinguished in previous studies.In this paper,the interfaces between filled drifts were firstly considered to investigate the stability of backfill roof.Failure modes and strength requirements of backfill roof in aligned and staggered drifts are comprehensively investigated by FLAC3D,with a focus on considerations of varied shear parameters of the interfaces.Results show that failure modes in aligned drifts transition from block sliding to top caving,bottom caving or sloughing as the interface cohesion increases from zero to at least half of the backfill cohesion.Further increases in interface cohesion allow aligned drifts to behave as if there are no interfaces between them.The critical stability conditions of backfill roof in aligned drifts were mostly determined by the interface strength instead of the backfill strength.However,the stability of backfill roof in staggered drifts is barely affected by the interface strength.The outcomes are expected to provide references for mining engineers to optimize drift layouts and perform cost-effective backfill roof strength design at mines using underhand drift-and-fill mining method.
基金funding supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB1140000)National Natural Science Foundation of China(22379156,U23A20141)+1 种基金Qingdao New Energy Shandong Laboratory(QIBEBT/SEI/QNESL S202305)Key R&D Program of Shandong Province,China(2024SFGC0102)。
摘要While 2D/3D heterostructures are widely employed to improve the stability of perovskite optoelectronic devices,their effectiveness is fundamentally governed by the crystallinity of the interfacial structure -a factor often overlooked.Disordered interfaces exhibit thermodynamic metastability,where ion diffusion induces sequential phase transitions from low-n to high-n phases.Here,we construct atomically ordered 2D/3D interfaces using phase-pure 2D perovskite capping layers,which reduce the interfacial phase transition rate by 95%and effectively suppress ion migration.As a result,devices exhibit outstanding operational stability,retaining over 99%of their initial power conversion efficiency after 1500 h of continuous operation,along with excellent thermal durability at 85℃.These findings identify interfacial order as a critical parameter for regulating ion dynamics and phase behavior,providing a robust design principle for achieving high-efficiency,long-lifetime perovskite technologies.
基金the National Natural Science Foundation of China(52274232)the Fundamental Research Funds for the Central Universities(2024ZYGXZR016)。
摘要Sodium metal batteries(SMBs)represent a promising alternative for large-scale energy storage and lowspeed electric vehicles,with resource-sustainable and cost-effective characteristics.However,its practical application is hindered by the high reactivity of sodium metal,interfacial and structural instability,and fire safety risks.Herein,a poly(1,3-dioxolane)(PDOL)crosslinked quasi-solid-state electrolyte(TPQSE)with fire extinguishing property and superior interface compatibility with sodium(Na)anodes and Na3V2(PO4)3(NVP)cathodes is prepared via in situ polymerization at room temperature(RT),utilizing trimethylolpropane triglycidyl ether(TTE)as a crosslinker in coordination with ethoxy(pentafluoro)cyclotriphosphazene(PFPN).The crosslinked network of TPQSE and the distinct solvation properties of TPDOL and PFPN facilitate Na-ion desolvation while enhancing antioxidant stability of TPQSE.Moreover,multifunctional PFPN improves fire safety through condensed-phase dense char layer formation and gas-phase free radical capturing.It also constructs uniform,dense,and inorganic-rich interphases between electrodes and electrolytes,strengthening interfacial stability.Consequently,the prepared electrolyte exhibits high ionic conductivity(2.109 mS cm-1at RT),high Na+transference number(0.570),and extended electrochemical window to 4.805 V.The Na‖TPQSE‖Na symmetric cell presents impressive cycling stability over 4510 h,and the Na‖TPQSE‖NVP cell displays outstanding rate capability and stable long-term cycling(≥2300 cycles).This work provides a promising approach for developing safe and high-performance quasi-solid-state sodium metal batteries.
基金support from National Natural Science Foundation of China(Grant No.51874033)to Prof.Hai-Yan Tang.
摘要In view of the frequent deterioration of molten steel quality during the tundish filling process,the slag-steel-air interface behavior in a tundish,including liquid level fluctuation,slag eyes,slag entrapment and air suction during the steady-state casting and filling process,was comparatively studied through physical modeling and mathematical simulation methods.During the filling process,the liquid surface forms a large-size slag eye under the impact of molten steel from a ladle shroud,which simultaneously results in a violent fluctuation of liquid level.Concurrently,the liquid flow entrains the air phase and the cover slag into the tundish impact zone,resulting in slag entrapment and air suction.At filling flow rates of 1.5Q,2.0Q,and 2.5Q(Q is the flow rate under steady-state casting),the amount of slag entrapped is 8.39×10-5,9.65×10-5,and 12.7×10-5m3,respectively,while the volume of air aspirated is 0.84×10-4,1.47×10-4,and 2.01×10-4m3,indicating that slag entrapment and air suction intensify with an increase in tundish filling flow rate.Flow field characterization identifies eddy currents in the impact zone as the primary driver of the above phenomena.Proper filling process parameters were proposed to improve the steel quality during the tundish filling.
摘要在艺术与科技研究领域中,针对目前大部分现有公开数据集过于老旧而导致已有研究方法在实际GUI(Graphical User Interface)检测中因界面所特有的组件种类多样、背景复杂的情况,同时因高分辨率显示器使得部分组件更小更密集从而导致检测效率不高和检测精度瓶颈等问题,该文依托太原师范学院智能科技与艺术创新科研平台自行构建GUI数据集并基于RT-DETR模型进行改进提出EM-DETR,构建面向GUI组件检测任务的实时目标检测网络创新性优化策略。为突破低质量样本与计算效率的双重限制,创新构建了引入增强定位敏感区域的表达能力模块的EMViT轻量化骨干网络;与此同时,为改善最近邻插值法可能出现细节丢失、锯齿状边缘和图像失真等问题,引入DySample上采样算子;最后为了解决低质量样本回归难题,设计基于WIoUv3的动态梯度分配策略。本实验在太原师范学院智能科技与艺术创新科研平台提供的GUI数据集中验证了检测精度及效率平衡方面的有效性。实验结果表明,检测平均精度(mAP)达到了89.8%,相较于原始RT-DETR提升了9.53百分点,同时,EM-DETR在检测速度上也表现出色,在GUI组件检测这一细分场景下,首次将RT-DETR架构的精度提高到可落地水平,在保持可接受的实时性同时大大提高了检测正确率。现已将其应用到教育部产学合作协同育人公示企业山西赛迩教育科技有限公司中的产品研发环节,取得良好效果。
摘要Invasive as well as non-invasive neurotechnologies conceptualized to interface the central and peripheral nervous system have been probed for the past decades,which refer to electroencephalography,electrocorticography and microelectrode arrays.The challenges of these mentioned approaches are characterized by the bandwidth of the spatiotemporal resolution,which in turn is essential for large-area neuron recordings(Abiri et al.,2019).
基金supported by the Research Grants Council of Hong Kong,General Research Fund(Grant no.11306021)the Hong Kong Innovation and Technology Commission(Grant no.ITS/295/23).
摘要Wearable and deformable electronics are becoming increasingly essential components of modern healthcare and daily life.To power such devices,flexible electrochemical energy storage(FEES)plays a critical role.The practical performance of FEES is dominated by charge and mass transfer at the electrodeelectrolyte interface,similar to many rigid battery technologies.However,a unique challenge for FEES is the durability of this interface under deformation.Herein,we present the first comprehensive review of the interface physics,unveiling the crucial role of interface adhesion in the mechanical endurance of FEES.By bridging adhesion physics,material chemistry,and device mechanics,adhesion reinforcement strategies are comprehensively discussed and quantitatively compared,providing multi-scale mechanisms for optimizing FFES interface-from nanoscale bond engineering to microscale surface topology,mechanical interlocking,and macroscale device design.Further,inspired by the synergetic effect of adhesion mechanisms,we propose potential research directions for durable electrode-electrolyte interfaces under dynamic deformation.We also revisit the evaluation of flexibility and electrochemical performance,proposing an application-driven bending index for device assessment.These insights on electrode-electrolyte interface physics of FEES will facilitate the flourishing future of flexible devices.
基金supported by the National Natural Science Foundation of China(Nos.52371031 and 52574435)the Science and Technology Development Program of Jilin Province,China(No.20250102103JC)+2 种基金the Science and Technology Development Program of Changchun City,China(No.23JQ03)Changbaishan Laboratory,China(No.CBS2025004-03)the Undergraduate Innovation Fund of Jilin University,China(No.S202410183310).
摘要Introducing Ti2AlC particles into TiAl alloys can effectively improve their strength,but this can also lead to stress concentration at the interface,resulting in the reduction of ductility.Therefore,Mn is adopted to synergistically improve the strength and ductility of the Ti2AlC/TiAl composite through solid solution and interface manipulation.The first-principles calculation shows the Ti-Mn bonds are formed at the Ti2AlC/TiAl interface after Mn doping,characterized primarily by metallic bonds with some covalent bonding.This combination preserves strength while enhancing ductility.Then,Ti2AlC/TiAl-Mn composite is prepared.The Ti2AlC,with an average size of 1.6μm,is uniformly distributed within the TiAl matrix.Mn doping reduces the lamellar colony size and lamellar thickness by 25.1%and 27.4%,respectively.A small quantity of Mn accumulates at the boundaries of the lamellar colonies.The Mn content must be controlled to avoid segregation,which may negatively impact performance.The yield stress,ultimate compressive stress,fracture strain,and product of strength and plasticity of the Ti2AlC/TiAl-Mn composite have been increased by 5.5%,11.5%,10.4%,and 23.0%,respectively,compared to those of the Ti2AlC/TiAl composite.The enhancement in strength is due to the combined effects of grain refinement,solid solution of Mn,and twining strengthening.Grain refinement and twin strengthening also can reduce stress concentration and improve ductility.In addition,at the electronic level,the Ti-Mn bond formed at the interface is contributed to the improvement of ductility.
基金supported by the National Key R&D Program of China(2022YFA1200075)the Shanghai pilot Program for Basic Research(grant no.22TQ1400100-8)+2 种基金the Shanghai Pujiang Program(grant no.20PJ1402500)the Natural Science Foundation of Shanghai(grant no.22ZR1416600)the Fundamental Research Funds for the Central Universities.
摘要Nanocomposite technology is an effective strategy to enhance the performance of capacitive deionization(CDI).However,the poor interfacial interactions between the nanofillers and matrices limit their further optimization and commercial application.Here,we developed an interface engineering strategy to prepare a high-strength and high-toughness fiber electrode based on holey reduced graphene oxide(HRGO)and carboxylated carbon nanotubes(CCNT)through introducing borate bonds as bridging interactions.The interface interaction between HRGO and CCNT is significantly enhanced by the formation of dynamic cross-linked borate bonds,which not only effectively preventπ-πstacking and construct hierarchical ion transport channels to enhance ion transport efficiency and reaction kinetics,but also significantly improve mechanical stability and long-cycle performance based on self-healing properties in the fiber electrode.This configuration showed remarkably enhanced desalination capacity(30.6 mg g-1)and higher desalination rate(6.12 mg g-1 min-1),with cycling performance exceeding 90%,which exceeds previously reported values.Density functional theory calculations further reveal the mechanism by which the nanocomposite interface affects the CDI performance.Based on this excellent performance,we established a recirculating desalination hydrogen production system consisting of multiple CDI units connected in series with a hydrogen production unit.This effective strategy opens a new way to optimize the nanocomposite interfaces and achieve efficient electrochemical reactions.
基金financial support from the Scientific Research Fund of Hunan Provincial Education Department,China(Nos.23C0250,22B0741)Scientific Research Fund of Provincial Natural Science Foundation of Hunan,China(Nos.2020JJ4243,2021JJ30180,2021JJ30184)Student Innovation Research and Entrepreneurship Training of Hunan Institute of Engineering,China.
摘要Li2CO3 was introduced into LiPF6-based electrolytes and the electrolytes were stored at 40°C.Nuclear magnetic analysis of electrolytes and X-ray diffraction characterization of reaction residues demonstrate the formation of LiPO2F2 and LiF during storage.This reformulated electrolyte boosts lifespan and Coulombic efficiency(CE)in Li||Li and Li||Cu cells,with Li||Li cells stably cycling for>800 h and 300 h at 0.5 mA/cm2 and 1.0 mA/cm2,respectively.Moreover,with the optimal content of Li2CO3,the CE of the reformulated electrolyte(91.56%)is greatly improved compared to that of the standard electrolyte(81.99%).The compatibility and enhanced rate performance of the reformulated electrolyte are also exhibited in Li||NCM full cells with a moderately high mass loading of 9.6 mg/cm2.
基金financially supported by the National Natural Science Foundation of China(No.51971153).
摘要Ultra-fine sizes and high thermal stability are often mutually exclusive for nanocrystalline(NC)materials because the high grain boundary(GB)energy of nanograins provides a large driving force for grain coarsening.Alloying is a classical strategy for stabilizing the microstructure of NC materials.However,the stabilization effects of alloying on NC materials typically rely on the segregation of solute atoms at GBs,which imposes restrictions on the selection of possible alloy systems.In this study,it is revealed experimentally and corroborated theoretically that the interface energies can be continuously regulated by simply manipulating the alloy composition in simple solid-solution alloy systems,enabling the control of the ultra-fine sizes and thermal stability of the alloys without GB segregation.In a model system of NC Au(Cu)-SiO2films,the dissolved Cu in Au can be used as a very accurate tool to tailor the interface energies of NC Au(Cu)-SiO2film,leading to ultra-fine(below 2 nm)Au(Cu)nanoparticles with exceptional thermal stability.Such Cu-induced grain refinement and thermal stabilization effects are supported by interface thermodynamic calculations.This study thus provides an alloying stabilization strategy without GB segregation,which broadens the scope for developing thermally stable NC alloy systems.
基金supported by the National Natural Science Foundation of China(No.52104345).
摘要The phase composition at the slag-iron interface and the distribution behavior of titanium,vanadium,chromium and silicon between hot metal and Ti-bearing electric furnace slag were thoroughly explored.The basicity range for the anosovite phase region was defined by using a phase diagram and a minimum smelting temperature was set at 1540℃.Thermodynamic calculations demonstrate that the activities of TiO2 and SiO2 in the slag decrease with increasing basicity,while those of V2O3 and Cr2O3 increase.Similarly,the activities of[Ti]and[Si]in the molten metal decrease,while those of[V]and[Cr]rise with increasing basicity.As basicity increases,the distribution ratios,LTi and LSi decrease,whereas LV and LCr increase.Significantly,the recovery efficiencies of vanadium and titanium are improved with higher basicity.The primary phases identified in the slag include anosovite,diopside,and titanium spinel.However,when the basicity exceeds 0.8,the formation of the perovskite phase becomes less favorable,suggesting that basicity should be maintained at or below 0.8.
基金supported by the National Natural Science Foundation of China(Nos.62304111,62304110,22579136)the National Key Research and Development Program of China(2024YFE0201800)+6 种基金the China Postdoctoral Science Foundation(No.2024M761492)the Project of State Key Laboratory of Organic Electronics and Information Displays(Nos.GDX2022010009,GZR2023010046)the Natural Science Research Start-up Foundation of Recruiting Talents of Nanjing University of Posts and Telecommunications(No.NY223053)the Science and Technology Project of Jiangsu(Science and Technology Cooperation Project of HongKong,Macao and Taiwan,No.BZ2023059)Shaanxi Fundamental Science Research Project for Mathematics and Physics(No.22jSY015)Young Talent Fund of Xi'an Association for Science and Technology(No.959202313020)Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems(No.2023B1212010003).
摘要Surface passivation via two-dimensional(2D)perovskite has emerged as a promising strategy to enhance the performance of perovskite solar cells(PSCs)due to the effective compensation of interfacial states.However,the in situ grown 2D perovskite passivation layers typically comprise a mixture of multiple dimensionalities at the interface,where band alignment has only been portrayed qualitatively and empirically.Herein,the interface states for precisely phase-tailored 2D perovskite passivated PSCs are quantitatively investigated.In comparison to traditional passivation molecules,2D perovskite layers based on 4-trifluoromethyl-phenylethylammonium iodide(CF3PEAI)exhibit an increased work function,introducing desirable downward band bending to eliminate the Schottky Barrier.Furthermore,precisely phase-tailored 2D layers could modulate the interface trap density and energetics.The n=1 film delivers optimal performance with a hole extraction efficiency of 95.1%.The optimized n-i-p PSCs in the two-step method significantly improve PCE to 25.40%,along with enhanced photostability and negligible hysteresis.It highlights that tailoring in the composition and phase distribution of the 2D perovskite layer could modulate the interface states at the 2D/3D interface.
基金Project(52174141)supported by the National Natural Foundation of ChinaProject(2023A313)supported by the Science and Technology Plan of Huainan City,ChinaProject(2024C943)supported by the Postdoctoral Research of Anhui Province,China。
摘要Weak rock-concrete interfaces significantly affect the stability of underground supporting structures.This study aims to investigate the effects of interface inclination on the creep behavior and failure mechanisms of composite specimens.Seven rock-concrete composite specimens with different inclination angles under hydrothermal curing at 60℃were prepared,and uniaxial and graded loading creep tests were completed.The results show that with increasing interface inclination,the compressive strength of the composite specimens initially decreases and then increases,with the minimum strength observed at inclinations between 60°and 75°.Three typical failure patterns were identified:axial failure,composite failure,and interface failure.The creep failure strength exceeded the uniaxial compressive strength,indicating improved time-dependent deformation resistance under elevated temperature curing.The instantaneous strain initially decreases and then increases as the interface inclination angle grows.Compared to 0°inclination,specimens with 45°,60°,75°,and 90°inclinations exhibited reductions in instantaneous strain of 2.64%,18.84%,23.29%,and 0.73%,respectively.The steady-state creep rate and creep ratio exhibited a decrease-stabilization-increase trend with increasing stress levels.Creep strain increased with increasing stress levels for all inclinations,with a sharp increase near the failure stage.A nonlinear constitutive model considering interface inclination and creep damage was developed based on damage theory.A nonlinear damage-based constitutive model incorporating interface inclination effects was developed,and its theoretical predictions closely matched the experimental data in all creep stages.These findings provide a quantitative understanding of creep failure mechanisms in rock-concrete interfaces and provide practical references for enhancing the safety of underground support systems.
基金co-supported by the National Natural Science Foundation of China(Nos.52275165 and 52305146)the Sichuan Science and Technology Program,China(Nos.2023YFG0165 and 2023NSFSC0372)+1 种基金the Sichuan Province Engineering Technology Research Center of General Aircraft Maintenance Project,China(No.GAMRC2023ZD03)the Student Innovation Fund Project,China(No.24CAFUC10202)。
摘要This paper investigates the “brush-like”deformation phenomenon of the contact interface at the bolt-hole during the interference-fit installation of high-locking bolts under static loading in CFRP connection structures.An innovative theoretical model is proposed to predict axial installation force,specifically designed for moderate interference-fit.This model is based on the “brush-like”deformation of the hole wall,with the axial installation force predicted through force analysis and theoretical calculations,effectively overcoming the limitations of prior models that idealized the contact interface at the bolt-hole.The predictions generated by this theoretical model align closely with experimental data,confirming its efficacy in accurately forecasting the curve of installation force for interferencefit bolts during the static installation within the moderate interference-fit range.Additionally,a comprehensive analysis of the relationship between deformation of the hole wall and curves of installation force across small,moderate,and large interference-fit levels are presented.It is demonstrated that the degree of deformation within the moderate interference-fit range is more suitable than that in the small and large interference-fit ranges,making it a reliable alternative for installation force tests within this range during static installation.The moderate interference-fit domain[1.00%,1.24%]is established as a validated and optimal range of interference-fit bolts for the static installation.
基金supported by the National Natural Science Foundation of China(Nos.22027801,22073088 and 22473104)。
摘要Bessel beams,often referred to as“nondiffractive”light,have been successfully applied in numerous fields.In this study,we integrated a Bessel beam as the illumination source into a Raman spectrometer to enhance the detection of homogeneous phases and interfaces.By simulating optical path systems,we optimized the setup to fully utilize the multi-pixel array and maximize detection sensitivity.Compared to a conventional Gaussian-beam Raman spectrometer in the 90°-scattered configuration,the upgraded Raman spectrometer employing a Bessel-like beam demonstrated a nearly 6-fold improvement in sensitivity.Additionally,it significantly suppressed background scattering interferences in the low-frequency range,thus enhancing the clarity and accuracy of spectral data.Furthermore,the capability of this spectrometer for real-space Raman imaging of heterogeneous phase interfaces was verified.This advancement not only improves the sensitivity and precision of Raman measurements but also expands the potential applications of Raman spectroscopy in studying complex systems,such as interfaces and phase boundaries,with high spatial and spectral resolution.
基金financially supported by the National Natural Science Foundation of China(No.22305193)the Natural Science Foundation of Chongqing(No.CSTB2023NSCQ-MSX0690)+2 种基金the Fundamental Research Funds for the central Universities(Nos.SWU-KQ22048,SWU-XDJH202314)the Innovation Research 2035Pilot Plan of Southwest University(No.SWU-XDZD22011)the Chongqing Research and Innovation Fund for postgraduate students(No.CYS23189).
摘要Glycerol oxidation reaction has got lots of attention in an electrocatalytic system of simultaneous hydrogen production and valuable chemicals generation.However,the lack of electrochemical dehydrogenation capability of the active phase is hard to deliver a large current density at a low potential.Furthermore,high selectivity of products is also still far from being completed due to the adsorption-desorption disequilibrium of glycerol and the obtained products,reducing the economic feasibility and limiting the practical application.Here,we propose a strategy to boost the electrocatalytic glycerol oxidation through electron-deficient Ni sites induced by electron transfer of heterojunction interface.Taking Ni3S2/Cu2S as a pre-catalysts,we demonstrate that the electron-deficient Ni site can favor the dehydrogenation of the active phase to facilitate the rapid transformation of Ni2+/Ni3+in the electrooxidation process of glycerol.Furthermore,electron deficient Ni sites balance competitive adsorption of active species,improving the activity and selectivity of glycerol oxidation.As expected,the electrocatalysts exhibit selectivity of 93.3%for formate at the 1.35 V,and require only 1.45 V to drive an industrial-level current densities of 600 mA/cm2.This work provides valuable insights into constructing highly active and selective electrocatalysts for organic electrosynthesis in hybrid water electrolysis.
基金financially supported by the National Key R&D Program of China(Grant No.2021YFA1200203)the National Natural Science Foundation of China(Grant No.12261160364)the National Natural Science Foundation of China/Research Grants Council Joint Research Scheme(Grant No.N_CityU173/22)。
摘要For decades,refining grain or twin structures at the nanoscale has been the cornerstone strategy for enhancing metal strength[1].However,when structural dimensions shrink to below~10 nm,this approach hits an insurmountable bottleneck,that is,material softening triggered by interface instability,which prevents further strength improvement[2-5].Now,writing in science,Li and colleagues introduce a novel strengthening approach based on nanoscale negative excess-energy interfaces(NEIs)that elevates the mechanical performance of nickelmolybdenum(Ni-Mo)alloys to an unprecedented level[6].