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Inducing the SnO2-based electron transport layer into NiFe LDH/NF as efficient catalyst for OER and methanol oxidation reaction 认领 引用 被引量：7
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作者 Changwu Wan Jie Jin +4 位作者 Xinyu Wei Shizhuo Chen Yi Zhang Tenglong Zhu Hongxia Qu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2022年第29期102-108,共7页
In an electrocatalyst with a heterointerface structure,the different interfaces can efficiently adjust the catalyst’s conductivity and electron arrangement,thereby enhancing the activity of the electrocatalyst.Ultrat... In an electrocatalyst with a heterointerface structure,the different interfaces can efficiently adjust the catalyst’s conductivity and electron arrangement,thereby enhancing the activity of the electrocatalyst.Ultrathin and smaller Ni Fe LDH was successfully constructed on the surface of SnOnanosheet supported NF by layer by layer assembly,and exhibits lower overpotential of 234 mV at a current density of 10 m A cm,which only increases by 6.4%even at a high current density of 100 mA cm.The excellent OER activity of catalyst is attributed to the contribution of the semiconductor SnOelectron transport layer.Through experiments and characterization,3d structure SnOnanosheets control the growth of ultra-thin nickel-iron,the hierarchical interface between SnOand Ni Fe LDH can change the electron arrangement around the iron and nickel active centers at the interface,resulting the valence states of iron slightly increased and Nicontent increased.The result will promote the oxidation of water.Meanwhile,the SnOsemiconductor as electron transport layer is conducive to trapping electrons generated in oxidation reaction,promoting electrons transferring from the Ni Fe LDH active center to the Ni substrate more quickly,and enhance the activity of Ni Fe LDH.It also shows excellent activity in an electrolyte solution containing 0.5 M methanol and 1 M KOH,and only 1.396 V(vs.RHE)is required to drive a current density of 10 mA cm. 展开更多
关键词 SnO2 nanosheet Electron transport layer Heterointerface structure Water oxidation Methanol oxidation Ultrathin NiFe LDH
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Modulation of wettability and interfacial reaction between DZ125 superalloy and Al2O3-based ceramic shell:Rare earth oxide doping strategy 认领 引用
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作者 Baohong Kou Wentao Zhou +1 位作者 Yujie Lin Jing Ouyang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第3期933-945,I0007,共13页
To inhibit the interfacial(displacement)reaction between Hf and Al elements in the DZ125 superalloy and the Al2O3 and SiO2 in the Al2O3-based ceramic shell,rare-earth oxides(La2O3 and Y2O3)w... To inhibit the interfacial(displacement)reaction between Hf and Al elements in the DZ125 superalloy and the Al2O3 and SiO2 in the Al2O3-based ceramic shell,rare-earth oxides(La2O3 and Y2O3)were used as dopants into the shell.The effects of dopant types and contents(2 wt%,5 wt%and 8 wt%)on the wettability and interfacial reaction were investigated using the sessile-drop experiment,and the reaction products were analyzed by X-ray diffraction(XRD),a scanning electron microscope(SEM),an electron probe microanalyzer(EPMA)and X-ray photoelectron spectroscopy(XPS),to clarify the mechanism of dopants in the interracial reaction.The results show that increasing the Y2O3 doping content(2 wt%-8 wt%)reduces the surface porosity from 22.39%to 13.43%,and decreases the surface roughness from 3.25 to 2.28μm,which enhances the packing density of the shell surface.In the sintering process(1223 K,2 h),both La2O3 and Y2O3 dopants react with SiO2,forming La2Si2O7 and Y2SiO5 on the shell surface.During the interfacial reaction process(1823 K,40 min),La2Si2O7 decomposes and reacts with Al2O3 and HfO2,resulting in the formation of SiO2·HfO2·La2O3 and Al2O3·HfO2·La2O3 ternary composite oxides within the reaction products.At 8 wt%La2O3 dopant content,the interfacial reaction is exacerbated,resulting in the uneven wettability.Y2SiO5 further reacts with Al2O3 and SiO2 to form SiO2·Al2O3·Y2O3 ternary composite oxides,while Y2O3 combines with Al2O3 to form Al5Y3O12(VAG),which stabilizes the oxides within the shell and inhibits the interfacial reaction,and significantly improves the surface quality of the DZ125 superalloy.As the Y2O3 dopant content increases(2 wt%-8 wt%),the wetting angle increases from 97.8°to 110.6°. 展开更多
关键词 Al2O3-Based ceramic shel DZ125 superalloy Rare earths Dopant Interfacial reaction Wettability
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Effect of active metal oxide dopants on wettability and interfacial reaction between K417G superalloy and Al2O3-based ceramic shell 认领 引用
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作者 Bao-hong KOU Wen-tao ZHOU +1 位作者 Yong-hui PENG Jing OUYANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第1期244-258,共15页
Some active metal oxides(Al2O3,TiO2,and Cr2O3)were selected as dopants to the Al2O3-based ceramic shells for investment casting of K417G superalloy.The effects of dopant types and contents(0,2,5,a... Some active metal oxides(Al2O3,TiO2,and Cr2O3)were selected as dopants to the Al2O3-based ceramic shells for investment casting of K417G superalloy.The effects of dopant types and contents(0,2,5,and 8 wt.%)on the wettability and interfacial reaction between the alloy and shell were investigated by a sessile-drop experiment.The results show that increasing the Al2O3 doping contents(0−8 wt.%)reduces the porosity(21.74%−10.08%)and roughness(3.22−1.34μm)of the shell surface.The increase in Cr2O3 dopant content(2−8 wt.%)further exacerbates the interfacial reaction,leading to an increase in the thickness of the reaction layer(2.6−3.1μm)and a decrease in the wetting angle(93.9°−91.0°).The addition of Al2O3 and TiO2 dopants leads to the formation of Al2TiO5 composite oxides in the reaction products,which effectively inhibits the interfacial reaction.The increase in TiO2 dopant contents(0−8 wt.%)further promotes the formation of Al2TiO5,which decreases the thickness of the interfacial reaction layer(3.9−1.2μm)and increases the wetting angle(95.0°−103.8°).The introduced dopants enhance the packing density of the shell surface,while simultaneously suppress the diffusion of active metal elements from the alloy matrix to the interface. 展开更多
关键词 Al2O3-based ceramic shell K417G superalloy metal oxide dopants interfacial reaction wettability
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Effect of ZrO2-based refractory on non-metallic inclusions in nickel-based superalloy K4169 认领 引用
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作者 Li-Kun Long Lin-Zhu Wang +3 位作者 Xiang Li Chao-Yi Chen Jun-Qi Li Xing Ran 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第2期63-74,共12页
The effects of ZrO2-based refractory materials on non-metallic inclusions in nickel-based superalloy K4169 were systematically investigated.Analytical methods,including X-ray fluorescence,X-ray diffraction,scanning... The effects of ZrO2-based refractory materials on non-metallic inclusions in nickel-based superalloy K4169 were systematically investigated.Analytical methods,including X-ray fluorescence,X-ray diffraction,scanning electron microscopy equipped with energy dispersive spectrometry,and FactSage simulations,revealed that the refractory primarily consisted of ZrO2,MgO,MgO·Al2O3,and Zr1.74Y0.26O3.87 phases.During melting,MgO reacted with[Al]and[O]in the alloy,forming MgO·Al2O3 at the interface.This phase adhered to the superalloy,while ZrO2 phases remained stable.The inclusions in the alloy transformed from Al2O3 to MgO·Al2O3,with variations in size and distribution influenced by location and pressure.FactSage kinetic simulations aligned with experimental findings,elucidating the interaction mechanisms between the alloy and refractory.These results provide insights into optimizing refractory materials for improved cleanliness and performance in nickel-based superalloy production. 展开更多
关键词 ZrO2-based refractory Nickel-based superalloy Non-metallic inclusion Kinetic calculation
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Effect of Ce element on hydrogen storage property of TiMn2-based alloys 认领 引用
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作者 Wenjiao Zhou Tongyue Li +3 位作者 Anjia Zhang Yaheng Zhao Qichen Tang Xiping Song 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第3期971-979,共9页
This study investigates the effect of Ce content on the hydrogen storage properties of Ti0.98Zr0.02Mn1.5Cr0.05V0.43Fe0.09Cex(x=0,0.02,0.04,and 0.06,at%)alloys.Microstructural analysis of these all... This study investigates the effect of Ce content on the hydrogen storage properties of Ti0.98Zr0.02Mn1.5Cr0.05V0.43Fe0.09Cex(x=0,0.02,0.04,and 0.06,at%)alloys.Microstructural analysis of these alloys revealed dendritic microstructures without the segregation of chemical elements,with the C14 Laves phase identified as the dominant phase.After two activation cycles at 4 MPa and 293 K,the alloys exhibited excellent hydrogen absorption properties.The addition of Ce significantly improved the kinetics of the alloys.At x=0.02,the hydrogen absorption capacity reached 90%of its maximum within 137 s at 293 K.Pressure-composition-temperature curves indicated that hydrogen absorption capacity initially increased first and then decreased with increasing Ce content,reaching a maximum value of 1.85wt%at x=0.04.Thermodynamic results demonstrated that the enthalpy and entropy of hydrogen absorption followed a similar trend,which was consistent with the variation in hydrogen storage capacity.Thus,the improvement in hydrogen absorption capacity due to the addition of Ce is attributed to the increase in enthalpy.The increase of the lattice constant in the C14 Laves phase and the deoxidization effect of Ce are expected to be beneficial for the improvement of hydrogen absorption kinetics. 展开更多
关键词 hydrogen storage property TiMn2-based alloys Ce element pressure-composition-temperature curve
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Enhancing polishing property of CeO2-based abrasives by co-doping with lanthanide and fluorine 认领 引用
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作者 Guangda Han Tian Xing +5 位作者 Dingai Xiang Min Cao You Xue Ziyu Yang Jilei Zhu Junjie Xu 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第7期2186-2194,I0007,共9页
The development of CeO2-based abrasives that simultaneously deliver faster processing speeds and smoother surfaces remains a significant challenge for semiconductor polishing applications,as it is difficult to make... The development of CeO2-based abrasives that simultaneously deliver faster processing speeds and smoother surfaces remains a significant challenge for semiconductor polishing applications,as it is difficult to make further progress by optimization of solely Ce3+content or particle size.In this work,we engineered lanthanide and fluorine co-doped CeO2-based abrasives to concurrently optimize both particle size and Ce3+content.Fluorine doping effectively reduces the particle size to approximately50 nm while simultaneously enhances the Ce3+concentration.Synergistic optimization is achieved in Fdoped Ce0.8La0.2Oxand Ce0.8Pr0.2Oxabrasives due to the additional enhancement of Ce3+content and generation of rare earth oxyfluorides,which can promote the polishing efficiency.Notably,F-doped Ce0.8La0.2Oxand Ce0.8Pr0.2Oxabrasives show material removal rates of 540.42 and 789.15 nm/min,which are 1.57 and 2.3 times that of CeO2.K9 substrate polished by F-doped Ce0.8La0.2Oxand Ce0.8Pr0.2Oxabrasives exhibits an average surface roughness of 0.091 and 0.018 nm,which are lower than 0.337 nm achieved by pristine CeO2.The results offer guidance for the design and preparation of highperformance CeO2-based abrasives. 展开更多
关键词 CeO2-based abrasives Particle size Ce3+content Synergistic effect Co-doping Rare earths
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SnO_2-based gas(hydrogen) anodes for aluminum electrolysis 认领 引用 被引量：4
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作者 肖赛君 Tommy MOKKELBOST +2 位作者 Ove PAULSEN Arne P.RATVIK Geir M.HAARBERG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第12期3917-3921,共5页
A novel SnO2-based gas anode was developed for aluminum electrolysis in molten cryolite at 850 ＆#176;C to reduce energy consumption and decrease CO2 emissions. Hydrogen was introduced into the anode, participating in... A novel SnO2-based gas anode was developed for aluminum electrolysis in molten cryolite at 850 ＆#176;C to reduce energy consumption and decrease CO2 emissions. Hydrogen was introduced into the anode, participating in the anode reaction. Carbon and aluminum were used as the cathode and reference electrodes, respectively. Cyclic voltammetry was applied in the cell to investigate the electrochemical behavior of oxygen ion on platinum and SnO2-based materials. The potential for oxygen evolution on these electrode materials was determined. Then, galvanostatic electrolysis was performed on the gas anode, showing a significant depolarization effect （a decrease of ~0.8 V of the anode potential） after the introduction of hydrogen, compared with no gas introduction or the introduction of argon. The results indicate the involvement of hydrogen in the anode reaction （three-phase-boundary reaction including gas, electrolyte and electrode） and give the possibility for the utilization of reducing gas anodes for aluminum electrolysis. 展开更多
关键词 SnO2-based gas anode hydrogen anode aluminum electrolysis
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Remarkable Enhancement of the Activity and Hydrothermal Stability of a CeO2-Based NH3-SCR Catalyst by Sn Modification 认领 引用 被引量：2
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作者 Ying Zhu Jingjing Liu +5 位作者 Guangzhi He Shaohua Xie Wenpo Shan Zhihua Lian Fudong Liu Hong He 《Engineering》 SCIE EI CSCD 2025年第5期141-150,共10页
Catalytic activity and hydrothermal stability are both crucial for the application of the selective catalytic reduction of NOxwith NH3(NH3-SCR)catalyst in diesel vehicles.In this study,a tin(Sn)-modified Ce-N... Catalytic activity and hydrothermal stability are both crucial for the application of the selective catalytic reduction of NOxwith NH3(NH3-SCR)catalyst in diesel vehicles.In this study,a tin(Sn)-modified Ce-Nb mixed-oxide catalyst was synthesized as an NH3-SCR catalyst for NOxemission control.After the intro-duction of Sn,both the NH3-SCR activity and the hydrothermal stability of the catalyst were remarkably promoted.Even after hydrothermal aging at 1000℃,the developed Ce1Sn2Nb1Oxcatalyst achieved more than 90%NOxconversion at 325-500℃.Various methods,including N2-physisorption,X-ray diffraction,in-situ high-temperature X-ray diffraction,high-resolution transmission electron microscopy,X-ray pho-toelectron spectroscopy,X-ray absorption fine-structure spectroscopy,temperature-programmed reduc-tion of hydrogen,temperature-programmed desorption of ammonia,and density functional theory calculations were used to investigate the promotional effects induced by the Sn species.The characteri-zation results showed that the addition of Sn not only promoted the formation of the Ce-Nb active phase but also improved its thermal stability,contributing to the excellent NH3-SCR performance and hydrothermal stability.This study provides an excellent sintering-resistance catalyst for the application of diesel engine NOxemission control. 展开更多
关键词 SnO2 CeO2-based catalyst NH3-SCR Hydrothermal stability NOxemission control
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A review of Al2O3-based eutectic ceramics for high-temperature structural materials 认领 引用 被引量：1
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作者 Xu Wang Yujie Zhong Qiaodan Hu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第11期214-232,共19页
Al2O3-based eutectic ceramics are considered as promising candidates for ultra-high-temperature structural materials due to their exceptional thermal stability and mechanical properties.Nonetheless,several chall... Al2O3-based eutectic ceramics are considered as promising candidates for ultra-high-temperature structural materials due to their exceptional thermal stability and mechanical properties.Nonetheless,several challenges must be overcome before they can be widely used.This paper reviews in detail the tailoring of microstructure from the aspect of process parameters,the updated knowledge gained in microstructure(crystallographic orientation,high-resolution interfacial structures)and the latest means of optimizing eutectic microstructure(seed-induced method,introducing low-energy grain boundaries and high-entropy phase).Additionally,the paper explores future techniques for the fabrication of bulk ceramic materials and effective toughening approaches.This review highlights the achievements made especially in the last 15 years,current limitations in Al2O3-based eutectic ceramics,and offers comprehensive insights and strategic guidance for further mechanical breakthroughs. 展开更多
关键词 Al2O3-based eutectic ceramics Eutectic solidification Interfacial structures Mechanical properties High-entropy oxides
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Origin of high strength and good ductility of TiH2-based powder metallurgy titanium alloy with discontinuous lamellar structures 认领 引用
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作者 Hai-rui ZHANG Hong-zhi NIU +3 位作者 Chao YANG Nan XIANG De-liang ZHANG Fu-xiao CHEN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2025年第10期3342-3356,共15页
A unique discontinuous lamellar microstructure of titanium alloys consisting of lamellar colonies at prior β-Ti grain boundaries and internal interwoven α-laths is prepared by a TiH2-based powder metallurgy metho... A unique discontinuous lamellar microstructure of titanium alloys consisting of lamellar colonies at prior β-Ti grain boundaries and internal interwoven α-laths is prepared by a TiH2-based powder metallurgy method.The α-variants get various crystallographic orientations and become discontinuous during vacuum annealing at 700℃.Remarkably,nanoscale phase δ-TiH compound layers are generated between α-laths and β-strips,so that dislocations are piled up at the α/δ/βinterfaces during tensile deformation.This leads to dislocation slips being confined to individual α-laths,with differentslips and particularly pyramidalslips being activated.The efficiency of wavy slip is promoted and the work hardening rate is enhanced.Finally,the combined effect of dispersed micro-shear bands and lath distortions is considered contributive for alleviating the stress concentration at grain boundaries,resulting in a high-promising synergy of enhanced ultimate tensile strength of 1080 MPa and good elongation to fracture of 13.6%. 展开更多
关键词 TiH2-based powder metallurgy discontinuous lamellar microstructure interfacialδ-TiH phase tensile properties deformation behavior
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SnO_2-based solid solutions for CH_4 deep oxidation: Quantifying the lattice capacity of SnO_2 using an X-ray diffraction extrapolation method 认领 引用 被引量：1
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作者 孙琪 徐香兰 +5 位作者 彭洪根 方修忠 刘文明 应家伟 余帆 王翔 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第8期1293-1302,共10页
A series of SnO2‐based catalysts modified by Mn, Zr, Ti and Pb oxides with a Sn/M （M=Mn, Zr, Ti and Pb） molar ratio of 9/1 were prepared by a co‐precipitation method and used for CH4 and CO oxidation. The Mn3＋, ... A series of SnO2‐based catalysts modified by Mn, Zr, Ti and Pb oxides with a Sn/M （M=Mn, Zr, Ti and Pb） molar ratio of 9/1 were prepared by a co‐precipitation method and used for CH4 and CO oxidation. The Mn3＋, Zr4＋, Ti4＋and Pb4＋cations are incorporated into the lattice of tetragonal rutile SnO2 to form a solid solution structure. As a consequence, the surface area and thermal stability of the catalysts are improved. Moreover, the oxygen species of the modified catalysts become easier to be reduced. Therefore, the oxidation activity over the catalysts was improved, except for the one modified by Pb oxide. Manganese oxide demonstrates the best promotional effects for SnO2. Using an X‐ray diffraction extrapolation method, the lattice capacity of SnO2 for Mn2O3 was 0.135 g Mn2O3/g SnO2, which indicates that to form stable solid solution, only 21%Sn4＋cations in the lattice can be maximally replaced by Mn3＋. If the amount of Mn3＋cations is over the capacity, Mn2O3 will be formed, which is not favorable for the activity of the catalysts. The Sn rich samples with only Sn‐Mn solid solution phase show higher activity than the ones with excess Mn2O3 species. 展开更多
关键词 SnO2-based solid solution X-ray diffraction extrapolation method Lattice capacity Methane deep oxidation Carbon monoxide oxidation
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Effect of mesoporous FA-SiO2 extracted from fly ash on the structural and photocatalytic properties of g-C3N4-based materials 认领 引用
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作者 Xianhua LI Qingbo YU 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS CSCD 2025年第7期694-706,共13页
To explore high value-added utilization pathways of fly ash,the mesoporous structure of silicon dioxide extracted from fly ash(FA-SiO2)was utilized to restrict the dicyandiamide(DCDA)thermal degradation process.Thi... To explore high value-added utilization pathways of fly ash,the mesoporous structure of silicon dioxide extracted from fly ash(FA-SiO2)was utilized to restrict the dicyandiamide(DCDA)thermal degradation process.This produced chemically bonded interacting composite photocatalysts of FA-SiO,and graphitic-phase carbon nitride(g-C3N4).Compared with the spherical silicon dioxide prepared using tetraethyl orthosilicate(TEOS-SiO2),the mesoporous structure of FA-SiO2,allowed DCDA to react in a smaller space,which facilitated the transformation of DCDA to melamine by the thermal degradation kinetics of FA-C3N4/DCDA.This ultimately boosted the formation of an N-atom-removed triazine ring structure and a multistage structure combining lumps and rods in the composite photocatalysts of g-C3N4,and FA-SiO2,which led to a higher visible-light utilization efficiency,a suitable valence-band position,and the photocatalytic activity for methylene blue reaching 3.56 times that of g-C3N4.The findings indicate that mesoporous FA-SiO,has the potential to improve the structural and photocatalytic properties of g-C3N4,-based materials. 展开更多
关键词 Fly ash(FA) FA-SiO2 g-C3N4-based materials Structural and photocatalytic properties
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Enhanced synaptic properties in HfO2-based trilayer memristor by using ZrO2-x oxygen vacancy reservoir layer for neuromorphic computing 认领 引用 被引量：1
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作者 Turgun Boynazarov Joonbong Lee +5 位作者 Hojin Lee Sangwoo Lee Hyunbin Chung Dae Haa Ryu Haider Abbas Taekjib Choi 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第24期164-173,共10页
Neuromorphic computing devices leveraging HfO2 and ZrO2 materials have recently garnered significant attention due to their potential for brain-inspired computing systems.In this study,we present a novel trilaye... Neuromorphic computing devices leveraging HfO2 and ZrO2 materials have recently garnered significant attention due to their potential for brain-inspired computing systems.In this study,we present a novel trilayer Pt/HfO2/ZrO2-x/HfO2/TiN memristor,engineered with a ZrO2-x oxygen vacancy reservoir(OVR)layer fabricated via radio frequency(RF)sputtering under controlled oxygen ambient.The incorporation of the ZrO2-x OVR layer enables enhanced resistive switching characteristics,including a high ON/OFF ratio(∼8000),excellent uniformity,robust data retention(>105 s),and multilevel storage capabilities.Furthermore,the memristor demonstrates superior synaptic plasticity with linear long-term potentiation(LTP)and depression(LTD),achieving low non-linearity values of 1.36(LTP)and 0.66(LTD),and a recognition accuracy of 95.3%in an MNIST dataset simulation.The unique properties of the ZrO2-x layer,particularly its ability to act as a dynamic oxygen vacancy reservoir,significantly enhance synaptic performance by stabilizing oxygen vacancy migration.These findings establish the OVR-trilayer memristor as a promising candidate for future neuromorphic computing and high-performance memory applications. 展开更多
关键词 HfO2-based trilayer memristor ZrO2-xoxygen vacancy reservoir Synaptic plasticity Non-volatile memory Neuromorphic computing
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Three-dimensionally ordered macroporous SnO_2-based solid solution catalysts for effective soot oxidation 认领 引用 被引量：3
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作者 Cheng Rao Rui Liu +6 位作者 Xiaohui Feng Jiating Shen Honggen Peng Xianglan Xu Xiuzhong Fang Jianjun Liu Xiang Wang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第10期1683-1694,共12页
A series of three‐dimensionally ordered macroporous(3DOM)SnO2‐based catalysts modified by the cations Ce4+,Mn3+,and Cu2+have been prepared by using a colloidal crystal templating method and tested for soot combustio... A series of three‐dimensionally ordered macroporous(3DOM)SnO2‐based catalysts modified by the cations Ce4+,Mn3+,and Cu2+have been prepared by using a colloidal crystal templating method and tested for soot combustion under loose contact condition.XRD and STEM mapping results confirm that all the secondary metal cations have entered the lattice matrix of tetragonal rutile SnO2 to form non‐continuous solid solutions,thus impeding crystallization and improving the surface areas and pore volumes of the modified catalysts.In comparison with regular SnO2 nanoparticles,the 3DOM SnO2 displays evidently improved activity,testifying that the formation of the 3DOM structure can anchor the soot particulates in the macro‐pores,which ensures that the contact of the soot particles with the active sites on the 3DOM skeleton is more easily formed,thus benefiting the target reaction.With the incorporation of the secondary metal cations,the activity of the catalyst can be further improved due to the formation of more abundant mobile oxygen species.In summary,these effects are believed to be the major factors responsible for the activity of the catalyst. 展开更多
关键词 Three‐dimensionally ordered macroporous catalyst Soot combustion SnO2 solid solution Lattice doping Oxygen vacancies
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Research Progress and Prospects of ZrO2-Based Catalysts in CO2 Hydrogenation 认领 引用
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作者 Hao Deng Fanjun Luo +2 位作者 Gang Feng Rongbin Zhang Runping Ye 《Carbon and Hydrogen》 SCIE CAS CSCD 2025年第4期401-419,共19页
The escalating atmospheric CO2 levels necessitate efficient catalytic technologies for its conversion into value-added chemicals.This review systematically summarizes recent advances in ZrO2-based catalysts for ... The escalating atmospheric CO2 levels necessitate efficient catalytic technologies for its conversion into value-added chemicals.This review systematically summarizes recent advances in ZrO2-based catalysts for CO2 hydrogenation,emphasizing their multifunctional roles beyond conventional supports.Owing to its tunable crystalline phases,abundant oxygen vacancies,and synergistic metal-support interactions,ZrO2 significantly enhances catalytic performance in producing methane,methanol,and other products.Key design strategies,such as phase engineering,morphology control,and the construction of inverse or composite structures,are discussed in relation to their influence on CO2 adsorption,intermediate stabilization,and reaction pathway regulation.Mechanistic insights reveal that ZrO2 facilitates H2 dissociation,promotes hydrogen spillover,and stabilizes active metal species,thereby optimizing product selectivity and catalyst durability.Furthermore,tandem catalytic systems integrating ZrO2 with zeolites demonstrate exceptional potential in steering C-C coupling while suppressing over-hydrogenation.This review not only elucidates structure-activity relationships and kinetic behaviors but also outlines future research directions,including in situ characterization and scalable catalyst design,thereby providing critical guidance for the development of high-performance CO2 hydrogenation catalysts and advancing carbon-neutral fuel and chemical production. 展开更多
关键词 CO2hydrogenation metal-support interactions oxygen vacancies reaction mechanism ZrO2-based catalysts
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Quantitative characterization of reaction behavior between La-bearing FeCrAl melt and CaO–Al2O3–La2O3-based slags and its guidance for design of mold flux 认领 引用
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作者 Lei Fan Tian-peng Qu +1 位作者 De-yong Wang Cheng-jun Liu 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2025年第3期646-658,共13页
The reaction behavior between CaO–Al2O3–La2O3-based slags and La-bearing FeCrAl melt was quantitatively characterized,which was further compared with the reaction behavior of CaO–SiO2-based slags.Bas... The reaction behavior between CaO–Al2O3–La2O3-based slags and La-bearing FeCrAl melt was quantitatively characterized,which was further compared with the reaction behavior of CaO–SiO2-based slags.Based on this,the new type of mold flux for La-bearing FeCrAl alloy continuous casting was designed and its basic properties were evaluated.The results showed that the order of reaction degree of fluxing agents in CaO–Al2O3–La2O3-based slags is(Na2O)>(B2O3)>(Li2O),and the percentages of mass change of fluxing agents were 85.8,54.29 and 42.35 wt.%,respectively.Moreover,the addition of(Li2O)and(Na2O)promoted the reaction between(CaO)and[Al],and the reaction degree of the former was weaker than that of the latter,which was due to the greater effect of(Na2O)on the activity of(CaO)and(Al2O3)than(Li2O).Compared with the reactivity of CaO–SiO2-based slags,the percentages of mass change of Al and La caused by slag–steel reaction decreased by 10.63–14.36 and 39.78–50.49 wt.%,respectively.The percentages of mass change of(Al2O3),(La2O3)and(CaO)in slags highest increased by 17.71,17.98,and 7.81 wt.%,respectively.The reactivity of CaO–Al2O3–La2O3-based slags was significantly weakened.Ultimately,the new type of mold flux was designed and the composition range was determined.The fundamental properties of new mold flux basically meet the theoretical requirements for La-bearing FeCrAl alloy continuous casting. 展开更多
关键词 La-bearing FeCrAl melt CaO-Al2O3-La2O3-based slag Reaction behavior Quantitative characterization Mold flux design
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高性能SnO2/NaTaO3 MEMS湿度传感器 认领 引用
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作者 熊刘燕 高云 《材料科学》 2026年第4期202-212,共11页
本研究采用两步水热法成功制备了SnO2/NaTaO3复合浆料,并将其应用于MEMS湿度传感器件。通过系统实验对比发现,相较于纯SnO2和纯NaTaO3,SnO2/NaTaO3复合材料表现出显著增强的湿度敏感特性,灵敏度提升达3~4倍,同时保持良好的长期稳定性。... 本研究采用两步水热法成功制备了SnO2/NaTaO3复合浆料,并将其应用于MEMS湿度传感器件。通过系统实验对比发现,相较于纯SnO2和纯NaTaO3,SnO2/NaTaO3复合材料表现出显著增强的湿度敏感特性,灵敏度提升达3~4倍,同时保持良好的长期稳定性。性能优化机制主要源于SnO2与NaTaO3的协同复合效应:两相复合促进电荷从NaTaO3向SnO2转移,有效提升了表面水的吸附和解吸附能力。动力学测试进一步表明,该复合材料具有快速的响应–恢复特性,响应时间和恢复时间分别为70 s和95 s,均优于单一组分材料。本研究不仅简化了高性能湿度敏感材料的制备流程,更为MEMS湿度传感器的实用化提供了可靠的技术支撑。 展开更多
关键词 SnO2/NaTaO3 MEMS器件 湿度传感器
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基于Ag掺杂g-C3N4/SnO2复合材料的低温高响应乙醇气体传感器 认领 引用
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作者 郭晓丽 叶祉旭 《传感器技术与应用》 2026年第3期585-599,共15页
开发高性能乙醇气体传感器在食品安全、医疗诊断与工业安全等领域具有重要意义。本文通过水热法成功制备了二维层状材料石墨氮化碳(g-C3N4)修饰的二氧化锡(SnO2)复合材料。得益于更小的纳米球状结构提供的丰富活性位点和形成的II型异质... 开发高性能乙醇气体传感器在食品安全、医疗诊断与工业安全等领域具有重要意义。本文通过水热法成功制备了二维层状材料石墨氮化碳(g-C3N4)修饰的二氧化锡(SnO2)复合材料。得益于更小的纳米球状结构提供的丰富活性位点和形成的II型异质结有效促进了界面电荷转移与气体分子吸附过程。所得的5wt% g-C3N4/SnO2传感器在100 ppm乙醇气体检测中表现出高响应值(Ra/Rg = 40.7),低检测限(0.3 ppm),最佳工作温度为200℃以及优异的选择性。相比于SnO2传感器而言最佳工作温度降低了175℃且响应值翻倍。在将g-C3N4成功引入到SnO2的基础上,进一步引入粒径Ag纳米颗粒,所制备的3wt% Ag-5wt% g-C3N4/ SnO2复合材料展现出最优异的气敏性能,其最佳工作温度为150℃,在100 ppm乙醇气氛中的响应值提升至45.6,与5wt% g-C3N4/SnO2二元复合材料相比,其最佳工作温度进一步降低了50℃。本研究为开发低工作温度、高灵敏度与高选择性的乙醇气体传感器提供了一种有效的材料设计策略。 展开更多
关键词 乙醇气体传感器 SnO2 g-C3N4 异质结 Ag掺杂
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Effect of Ni-coated MoS2 on microstructure and tribological properties of(Cu−10Sn)-based composites 认领 引用 被引量：14
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作者 Tian-xu QIU Shi-yan PAN +2 位作者 Cang FAN Xu-fei ZHU Xiao-ping SHEN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第9期2480-2490,共11页
The(Cu−10Sn)−Ni−MoS2 composites,prepared by powder metallurgy,were studied for the effects of Ni-coated MoS2 on the microstructure,mechanical properties and lubricating properties.The mechanism of effects of Ni and Mo... The(Cu−10Sn)−Ni−MoS2 composites,prepared by powder metallurgy,were studied for the effects of Ni-coated MoS2 on the microstructure,mechanical properties and lubricating properties.The mechanism of effects of Ni and MoS2 on the properties of composites was analyzed through a comparative experiment by adding Ni and MoS2 separately.The results show that the nickel wrapping around the MoS2 particles decreases the reaction rate of MoS2 with the copper matrix,and greatly improves the bonding of the matrix.The composites with 12 wt.%Ni-coated MoS2(C12)show the optimum performance including the mechanical properties and tribological behaviors.Under oil lubrication conditions,the friction coefficient is 0.0075 with a pressure of 8 MPa and a linear velocity of 0.25 m/s.The average dry friction coefficient,sliding against 40Cr steel disc,is measured to be 0.1769 when the linear velocity and pressure are 0.25 m/s and 4 MPa,respectively. 展开更多
关键词 tribology solid-lubricating interface bonding Ni-coated MoS2 (Cu−10Sn)-based composites
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Effect of VC/Cr_3C_2 on microstructure and mechanical properties of Ti(C,N)-based cermets 认领 引用 被引量：12
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作者 詹斌 刘宁 +2 位作者 金之铂 李其龙 石锦罡 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第5期1096-1105,共10页
Effects of VC/Cr3C2 on the microstructure and mechanical properties of Ti（C,N）-based cermets were studied. The microstructure was investigated by means of optical microscopy, X-ray diffractometry as well as scanning... Effects of VC/Cr3C2 on the microstructure and mechanical properties of Ti（C,N）-based cermets were studied. The microstructure was investigated by means of optical microscopy, X-ray diffractometry as well as scanning electron microscopy in combination with energy dispersive spectrometry. Mechanical properties, such as transverse rupture strength, hardness and fracture toughness, were measured. The results show that there are black core-grey rim structure and white core-grey rim structure in the microstructure. The grains become fine due to the VC/Cr3C2, and the grains of cermet added with 0.75VC/0.25Cr3C2 are refined most remarkably. The black core becomes finer with the increase of VC addition and rim phase becomes thicker with the decrease of Cr3C2 addition. The porosity increases with the increase of VC addition in VC/Cr3C2. Compared with the cermet free of VC/Cr3C2, the transverse rupture strength and hardness of cermets with VC/Cr3C2 are both improved, and the maximum values are both found for the cermet with 0.25VC/0.75Cr3C2. The fracture toughness can be effectively promoted by adding VC/Cr3C2 with an appropriate ratio of VC to Cr3C2, and the maximum value is found for the cermet with 0.5VC/0.5Cr3C2. 展开更多
关键词 Ti（C N）-based cermet VC Cr3C2 microstructure mechanical properties
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