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Atmosphere-Regulated Pyrolysis Switches ORR Pathway on Iron-Based Catalyst for H2O2 Synthesis and Zn-Air Batteries 认领 引用
1
作者 Songhan Hu Mingyuan Ma +2 位作者 Xinxin Xu Kai Wang Qiang Wang 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2026年第3期209-218,共10页
Developing simple methods to achieve flexible regulation of oxygen reduction reaction(ORR)selectivity is essential for sustainable energy technologies,yet remains challenging.An effective strategy for directing ORR se... Developing simple methods to achieve flexible regulation of oxygen reduction reaction(ORR)selectivity is essential for sustainable energy technologies,yet remains challenging.An effective strategy for directing ORR selectivity through pyrolysis atmosphere is proposed using[Fe(TPDC)2(BIB)2]n(FeMOF,TPDC=3,4-thiophenedicarboxylic acid;BIB=1,4-bis(3-imidazolyl)-benzene)as the precursor.Notably,Fe2O3derived from air pyrolysis exhibits high two-electron(2e-)ORR selectivity for hydrogen peroxide(H2O2)production,achieving a rate of 0.99 mol g⁻¹h⁻¹,whereas Fe and Fe3C encapsulated in nitrogen-doped carbon nanotubes(Fe/Fe3C@NCNTs)from N2-pyrolysis demonstrates high-efficiency four-electron(4e-)ORR selectivity(E1/2=0.92 V vs.RHE),exceeding Pt/C.Fe/Fe3C@NCNT-based cathode enabled zinc-air battery(ZAB)to achieve exceptional peak power density and remarkable cycle stability.Theoretical calculations indicate that the binding strength of the*OOH intermediate governs ORR selectivity.Simple atmosphere adjustment during the pyrolysis process enables on-demand optimization of electrocatalyst ORR selectivity,demonstrating MOF potential in electrocatalysis and providing new perspectives for designing low-cost,efficient non-noble metal catalysts. 展开更多
关键词 hydrogen peroxide iron-based electrocatalyst oxygen reduction reaction oxygen reduction reaction selectivity zinc-air battery
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Adsorption,transformation,biodegradation and potential ecological toxicity of iron-based nanoparticles in the aqueous environment 认领 引用
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作者 Yang Gao Xiaocheng Wei +1 位作者 Jing Sun Shaohu Ouyang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第4期188-198,共11页
Iron-based nanoparticles(Fe-NPs)have wide environmental applications in various areas due to their excellent physicochemical properties,and these processes also increase their release into the water environment.Howeve... Iron-based nanoparticles(Fe-NPs)have wide environmental applications in various areas due to their excellent physicochemical properties,and these processes also increase their release into the water environment.However,the existing literature on environmental behavior fate(e.g.,sorption and transformation)and potential ecotoxicity of Fe-NPs remains limited,which is vital for understanding the Fe-NPs environmental behavior and application as a multifunctional product.In this review,the green synthesis,characterization,and environmental application of Fe-NPs are summarized.We systematically examined the impacts of Fe-NPs physicochemical properties on its adsorption,transformation(e.g.,aggregation dispersion,dissolution,oxidation),and biodegradation behavior in aqueous ecosystems.Moreover,we highlight the potential ecological toxicity of Fe-NPs to aquatic organisms.Upon exposure in water environments,Fe-NPs have potential ecological toxicity on aquatic organisms(e.g.,microorganisms,plants,zooplankton,and fish).The common mechanisms of Fe-NPs ecotoxicity(e.g.,bioaccumulation,oxidation stress,and DNA damage)at the cellular level are presented and the remaining unclear points on nano-toxic mechanisms(e.g.,metabolic disturbance,genotoxicity)are discussed.Given the unresolved issues,the substantial gaps and the environmental risk assessment of Fe-NPs require further attention in the future.This paper will provide useful information for assessing the fate and potential ecological risks associated with Fe-NPs in aquatic environments. 展开更多
关键词 Iron-based nanomaterials Environmental behaviour Stability Potential risk Water environments
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Response of the C4 magnetic phase in iron-based superconductors to electronic structure tuning via doping/uniaxial strain 认领 引用
3
作者 Li-Li Meng Ting-Ting Han +3 位作者 Yu-Jing Ren Jing-Zhi Chen Peng-Hao Yuan Yan Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第5期259-268,共10页
Elucidating how magnetic interactions are established in high-temperature superconductors is crucial for resolving the long-standing puzzle of the superconducting pairing mechanism.However,for iron-based superconducto... Elucidating how magnetic interactions are established in high-temperature superconductors is crucial for resolving the long-standing puzzle of the superconducting pairing mechanism.However,for iron-based superconductors,due to the diversity of their magnetic and electronic structures,the mechanism of magnetic interactions remains controversial.Here,we employed in-situ alkali-metal deposition and uniaxial strain to tune the four-fold(C4)magnetic phase in Sr0.64Na0.36Fe2As2and utilized angle-resolved photoemission spectroscopy(ARPES)to probe the response of its electronic structure.We found that the alkali-metal deposition suppresses the C4 magnetic phase effectively,driving the system into a stripe spin density wave phase with two-fold rotational(C2)symmetry.Counterintuitively,the uniaxial strain that naturally breaks the C4 rotational symmetry of the lattice exerts only a limited suppressive effect on the C4 magnetic phase.While the sensitivity of C4 magnetic phase to electron doping implies that the orbital selectivity of Fermi surface nesting plays a critical role in determining the magnetic configuration,validating the contribution of itinerant electrons in mediating the magnetic fluctuations,the insensitivity of the C4 magnetic phase to uniaxial strain suggests that the nematic order exhibits no intermediate correlation with the magnetism in iron-based superconductors.Our results provide crucial clues for a comprehensive understanding of the complex phase diagram of iron-based superconductors. 展开更多
关键词 iron-based superconductors angle-resolved photoemission spectroscopy spin density wave
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Iron-based Catalysts Catalyzing Isoprene Polymerization:The Effect of Conjugated Groups in Cyanide-containing Electron Donors 认领 引用
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作者 Yao Liu Yao-Guang Liu +7 位作者 Jun-Xin Xu Qi Yang Wen-Peng Zhao Liang Fang Xiu-Juan Wang Heng Liu Chun-Yu Zhang Xue-Quan Zhang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第5期1502-1512,I0016,共11页
In this study,the coordination pathways and decomposition behavior of azo-containing dicyano compounds within Fe(acac)3/AliBu3/donor ternary catalyst systems were systematically investigated via in situ Raman spectros... In this study,the coordination pathways and decomposition behavior of azo-containing dicyano compounds within Fe(acac)3/AliBu3/donor ternary catalyst systems were systematically investigated via in situ Raman spectroscopy.Additionally,the modulating effect of conjugated moieties on the coordination interaction between cyanide groups and Fe ions was examined in detail.Experimental results demonstrate that isoprene polymerization catalyzed by azodicyanide mediated Fe-based catalytic systems proceeds via a coordination polymerization mechanism.Notably,the azo group does not directly participate in the coordination process;instead,it exerts a regulatory influence on the coordination capacity of the cyano group.Although thermal decomposition of the azo group occurs at elevated temperatures,it fails to initiate free radical polymerization of the isoprene monomer.Conjugated moieties including azo,vinyl,and benzene rings exert distinct impacts on the cyanide group.As electron-donating species,their Raman spectral characteristics reflect varying influences on cyanide coordination behavior.Density functional theory(DFT)calculations demonstrate that AIBN with azo groups as the conjugated moiety exhibits the most negative Gibbs free energy(ΔG°=–222.71 kcal·mol–1)for the coordination reaction with Fe2+,indicating that the cyano groups in the azo-containing compound possess the strongest coordination capability with Fe2+.The coordination effects of conjugated groups on the cyanide center follow the sequence:azo>carbon-carbon double bond>benzene ring,where azo groups show the most significant coordination enhancement.These theoretical findings are consistent with the observed polymerization activity,suggesting that rational design of electron donors can be guided by theoretical calculations. 展开更多
关键词 Iron-based catalysts Polyisoprene Azo group Raman spectroscopy Density functional theory(DFT)
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Iron-Based Lewis/Brønsted Deep Eutectic Solvents for the Hydrolysis of Nylon-6,6 认领 引用
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作者 Marco Rollo Francesca Rastelli +3 位作者 Marta Ximenis Elisa Martinelli Gianluca Ciancaleoni Haritz Sardon 《Engineering》 SCIE EI CSCD 2026年第3期106-113,共8页
Approximately one-third of the global nylon production is accounted for by polyamide 6,6(PA 66),with an annual output of 2.5 million tonnes.Despite its limited biodegradability,few end-of-life recycling strategies hav... Approximately one-third of the global nylon production is accounted for by polyamide 6,6(PA 66),with an annual output of 2.5 million tonnes.Despite its limited biodegradability,few end-of-life recycling strategies have been developed for PA 66.In this work,PA 66 is quantitatively depolymerized into its monomers:adipic acid and hexamethylenediamine(recovered as diammonium dichloride)using a naturally abundant iron-based Lewis/Brønsted acidic deep eutectic solvents(LBDESs)at 180℃ in 5 h.After optimization of the reaction conditions and work-up procedure,the overall monomer recovery yield exceeds 85%.The process is effective not only for virgin PA 66 in pellet and fiber forms but also with real post-consumer 100%nylon hosiery.Furthermore,environmental performance metrics for this method were evaluated and compared to previously reported depolymerization processes,indicating that the present approach is competitive. 展开更多
关键词 Polyamide 6,6 depolymerization Chemical recycling Deep eutectic solvents Iron-based catalysis Monomer recovery
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Iron-based catalysts for NOx reduction:Reaction mechanism and anti-poisoning strategies 认领 引用
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作者 Zaisheng Jin Fuli Wang +6 位作者 Yongjie Shen Xiaonan Hu Yanqi Chen Jin Zhang Ming Xie Penglu Wang Dengsong Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第4期232-245,共14页
Iron-based metal oxide catalysts are widely used for selective catalytic reduction(SCR)of NOx with NH3 due to their excellent catalytic performance at medium and high temperatures,high nitrogen selectivity,robus... Iron-based metal oxide catalysts are widely used for selective catalytic reduction(SCR)of NOx with NH3 due to their excellent catalytic performance at medium and high temperatures,high nitrogen selectivity,robust resistance to sulfur dioxide poisoning,environmental sustainability and cost effectiveness.However,several challenges including sub-optimal low-temperature catalytic activity,narrow operating temperature range,poor resistance to alkali/alkaline earth metal poisoning,as well as insufficient thermal stability and H2O/SO2 resistance always hinder the further application of iron-based metal oxide catalysts,which is in urgent need of further improvement in practical applications.This review provides a comprehensive overview of the development,applications and challenges associated with different types of iron-based metal oxide catalysts and suggests corresponding modification strategies to address the as-mentioned issues.Iron oxide catalysts can promote low-temperature catalytic performance by adjusting crystal structures and exposing specific crystal faces;however,their thermal stability and resistance to SO2/H2O and alkali metals still have substantial room for improvement.Iron-based composite metal oxide catalysts can effectively increase the resistance to SO2/H2O by coupling multiple metals and modulating adjacent electronic sites.Iron-based acidic salt catalysts greatly enhance the resistance to alkali metal poisoning by enriching the surface acid sites and providing sacrificial sites.Supported iron-based metal oxide catalysts can significantly improve both catalytic performance and resistance by modulating reaction pathways and constructing core-shell structures.This review clarifies the important direction of further research on iron-based metal oxide catalysts,and provides scientific basis and design ideas for the development and application of high-efficiency low-temperature NOx reduction catalysts. 展开更多
关键词 Nitric oxide Selective catalytic reduction Iron-based catalysts Anti-poisoning Environmental catalysis
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Research progress and application prospects of iron-based cathode materials for all-solid-state batteries 认领 引用
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作者 Zunru Zhao 《Advances in Engineering Innovation》 2026年第7期63-71,共9页
Fully solid-state batteries,with their inherent high safety and high energy density,are emerging as a core area of development for next-generation electrochemical energy storage technologies.However,cathode materials ... Fully solid-state batteries,with their inherent high safety and high energy density,are emerging as a core area of development for next-generation electrochemical energy storage technologies.However,cathode materials remain a critical bottleneck in determining their overall performance.Iron-based cathode materials offer advantages such as abundant resources,low cost,environmental friendliness and flexible lithium storage mechanisms,and have seen a series of breakthroughs in the field of all-solid-state batteries in recent years.This review systematically examines the electrochemical reaction mechanisms,performance characteristics and modification strategies of lithium iron phosphate-based insertion materials,halide-based mixedconducting materials,and sulfide and oxide-based transition materials.It points out that poor solid–solid interface compatibility,slow reaction kinetics and significant volume effects during charging and discharging are common core challenges across these material types,with interface engineering,integrated electrode design and self-healing mechanisms representing key paths to overcoming these bottlenecks.Lastly,looking to the future,the industrialisation of iron-based cathode materials requires a focus on multi-scale co-design,as well as breakthroughs in low-cost,large-scale fabrication processes and full-cell integration technologies,thereby providing the core foundation for the commercial application of high-safety,low-cost all-solid-state batteries. 展开更多
关键词 all-solid-state batteries iron-based cathode materials interface engineering conversion reactions monolithic electrodes
Iron-Based Metal Matrix Composite:A Critical Review on the Microstructural Design,Fabrication Processes,and Mechanical Properties 认领 引用 被引量：3
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作者 Sai Chen Shuangjie Chu Bo Mao 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2025年第1期1-44,共44页
Iron-based metal matrix composites(IMMCs)have attracted significant research attention due to their high specific stiffness and strength,making them potentially suitable for various engineering applications.Microstruc... Iron-based metal matrix composites(IMMCs)have attracted significant research attention due to their high specific stiffness and strength,making them potentially suitable for various engineering applications.Microstructural design,including the selection of reinforcement and matrix phases,the reinforcement volume fraction,and the interface issues are essential factors determining the engineering performance of IMMCs.A variety of fabrication methods have been developed to manufacture IMMCs in recent years.This paper reviews the recent advances and development of IMMCs with particular focus on microstructure design,fabrication methods,and their engineering performance.The microstructure design issues of IMMC are firstly discussed,including the reinforcement and matrix phase selection criteria,interface geometry and characteristics,and the bonding mechanism.The fabrication methods,including liquid state,solid state,and gas-mixing processing are comprehensively reviewed and compared.The engineering performance of IMMCs in terms of elastic modulus,hardness and wear resistance,tensile and fracture behavior is reviewed.Finally,the current challenges of the IMMCs are highlighted,followed by the discussion and outlook of the future research directions of IMMCs. 展开更多
关键词 Iron-based metal matrix composites Microstructure Fabrication methods Mechanical properties
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Optimization of process parameters for preparation of vanadium-iron-based alloy via silicon thermal reduction 认领 引用
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作者 Ning Sun Yi-min Zhang +6 位作者 Nan-nan Xue Kui-song Zhu Jun-han Li Shao-li Yang Lan Ma Xiang-li Cheng Lu Lu 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2025年第11期3722-3736,共15页
Specialized vanadium(V)-iron(Fe)-based alloy additives utilized in the production of V-containing steels were investigated.Vanadium slag from the Panzhihua region of China was utilized as a raw material to optimize pr... Specialized vanadium(V)-iron(Fe)-based alloy additives utilized in the production of V-containing steels were investigated.Vanadium slag from the Panzhihua region of China was utilized as a raw material to optimize process parameters for the preparation of V-Fe-based alloy via silicon thermal reduction.Experiments were conducted to investigate the effects of reduction temperature,holding time,and slag composition on alloy-slag separation,alloy microstructure,and the oxide content of residual slag,with an emphasis on the recovery of valuable metal elements.The results indicated that the optimal process conditions for silicon thermal reduction were achieved at reduction temperature of 1823 K,holding time of 240 min,and slag composition of 45 wt.%SiO2,40 wt.%CaO,and 15 wt.%Al2O3.The resulting V-Fe-based alloy predominantly consisted of Fe-based phases such as Fe,titanium(Ti),silicon(Si)and manganese(Mn),with Si,V,as well as chromium(Cr)concentrated in the intercrystalline phase of the Fe-based alloy.The recoveries of Fe,Mn,Cr,V,and Ti under the optimal conditions were 96.30%,91.96%,86.53%,80.29%,and 74.82%,respectively.The key components of the V-Fe-based alloy obtained were 41.96 wt.%Si,27.55 wt.%Fe,12.13 wt.%Mn,5.53 wt.%V,4.86 wt.%Cr,and 3.74 wt.%Ti,thereby enabling the comprehensive recovery of the valuable metal from vanadium slag. 展开更多
关键词 Vanadium slag Silicon thermal reduction Process parameter optimization Vanadium–iron-based alloy Valuable metal element
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Crystal growth and characterization of a hole-doped iron-based superconductor Ba(Fe0.875Ti0.125)2As2 认领 引用
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作者 Yi-Li Sun Ze-Zhong Li +5 位作者 Yang Li Hong-Lin Zhou Amit Pokhriyal Haranath Ghosh Shi-Liang Li Hui-Qian Luo 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第12期440-447,共8页
We report the crystal growth of a new hole-doped iron-based superconductor Ba(Fe0.875Ti0.125)2As2by substituting Ti on the Fe site.The crystals are accidentally obtained in trying to grow Ni doped Ba2Ti... We report the crystal growth of a new hole-doped iron-based superconductor Ba(Fe0.875Ti0.125)2As2by substituting Ti on the Fe site.The crystals are accidentally obtained in trying to grow Ni doped Ba2Ti2Fe2As4O.After annealing at 500℃ in vacuum for one week,superconductivity is observed with zero resistance at Tc0≈17.5 K,and about 20%diamagnetic volume down to 2 K.While both the small anisotropy of superconductivity and the temperature dependence of normal state resistivity are akin to the electron doped 122-type compounds,the Hall coefficient is positive and similar to the case in hole-doped Ba0.9K0.1Fe2As2.The density functional theory calculations suggest dominated hole pockets contributed by Fe/Ti 3d orbitals.Therefore,the Ba(Fe1-xTix)2As2system provides a new platform to study the superconductivity with hole doping on the Fe site of iron-based superconductors. 展开更多
关键词 iron-based superconductors crystal growth flux method hole-doped compounds
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Unveiling cutting-edge developments on d-block iron-based materials for electrocatalytic ammonia synthesis 认领 引用
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作者 Yi-Hang Yu Yi-Fan Yuan +5 位作者 Wei Li Mohamed Nawfal Ghazzal Yi-Bing Cheng Jing-Wei Li Ru-Chun Li San-Ping Jiang 《Rare Metals》 SCIE EI CAS CSCD 2025年第12期9785-9798,共14页
Ammonia is regarded as "Hydrogen 2.0" and is an ideal zero-carbon energy source.Electrocatalysis technology enables the synthesis of ammonia at room temperature and pressure.Iron-based catalysts exhibit grea... Ammonia is regarded as "Hydrogen 2.0" and is an ideal zero-carbon energy source.Electrocatalysis technology enables the synthesis of ammonia at room temperature and pressure.Iron-based catalysts exhibit great potential in electrocatalytic ammonia synthesis because of the unfilled d-orbital of iron sites,which are beneficial for the adsorption and activation of reactive species.This review unveils cutting-edge developments of iron-based catalysts in electrocatalytic ammonia synthesis.Firstly,the fundamental principle of electrocatalytic ammonia synthesis is introduced.The nanostructure-catalytic activity relationship,the electronic structure-catalytic activity relationship,and the influence of electrolyte properties on catalytic performance are also analyzed to work out the key parameters for designing efficient iron-based catalysts and electrodes.Lastly,the challenges and development prospects of iron-based catalysts for electrocatalytic ammonia synthesis are highlighted to guide the development of low-cost and large-scale sustainable electrocatalysts. 展开更多
关键词 Electrocatalytic ammonia synthesis d-block iron-based catalyst Nanostructure Electronic structure Electrolyte
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Effect of potassium hexatitanate addition on the performance of iron-based oxygen carriers in coal-direct chemical looping combustion 认领 引用
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作者 Guoxing Wei Tao Liu +4 位作者 Fanglin Song Facun Jiao Lirui Mao Yuanchun Zhang Shengtao Gao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2025年第11期35-44,共10页
Coal-direct chemical looping(CDCL) is a promising CO2 capture technology with low costs.Potassium modification can significantly enhance the reactivity of iron-based oxygen carriers and coal.However,potassium loss ... Coal-direct chemical looping(CDCL) is a promising CO2 capture technology with low costs.Potassium modification can significantly enhance the reactivity of iron-based oxygen carriers and coal.However,potassium loss causes a decline in cyclic stability.To address this,we prepared a potassium hexatitanate-modified iron-based OC and conducted CDCL experiments in a fixed-bed reactor using Zhundong coal coke as fuel.The study examined the impact of potassium hexatitanate on carbon conversion,OC activity stability,and potassium maintenance.Additionally,Fact Sage was used to calculate potassium fugacity patterns at different temperatures,Fe2O3/C molar ratios,and OC reduction degrees.Results showed that potassium hexatitanate increased carbon conversion,achieving 50%conversion at 40% potassium addition.In multi-cycle tests,carbon conversion rose with increased cycle times,reaching 84%.This improvement is attributed to ion exchange between Fe3+ and Ti4+,which induces lattice distortion and creates oxygen vacancies,enhancing OC reactivity.Potassium content remained stable during multi-cycle tests,indicating the effective potassium retention capacity of potassium hexatitanate. 展开更多
关键词 Coal-direct chemical looping combustion Iron-based oxygen carrier K2Ti6O13 FactSage simulation
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New Iron-based SiC Spherical Composite Magnetic Abrasive for Magnetic Abrasive Finishing 认领 引用 被引量：14
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作者 ZHANG Guixiang ZHAO Yugang +2 位作者 ZHAO Dongbiao ZUO Dunwen YIN Fengshi 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2013年第2期377-383,共7页
SiC magnetic abrasive is used to polish surfaces of precise,complex parts which are hard,brittle and highly corrosion-resistant in magnetic abrasive finishing(MAF).Various techniques are employed to produce this magne... SiC magnetic abrasive is used to polish surfaces of precise,complex parts which are hard,brittle and highly corrosion-resistant in magnetic abrasive finishing(MAF).Various techniques are employed to produce this magnetic abrasive,but few can meet production demands because they are usually time-consuming,complex with high cost,and the magnetic abrasives made by these techniques have irregular shape and low bonding strength that result in low processing efficiency and shorter service life.Therefore,an attempt is made by combining gas atomization and rapid solidification to fabricate a new iron-based SiC spherical composite magnetic abrasive.The experimental system to prepare this new magnetic abrasive is constructed according to the characteristics of gas atomization and rapid solidification process and the performance requirements of magnetic abrasive.The new iron-based SiC spherical composite magnetic abrasive is prepared successfully when the machining parameters and the composition proportion of the raw materials are controlled properly.Its morphology,microstructure,phase composition are characterized by scanning electron microscope(SEM)and X-ray diffraction(XRD)analysis.The MAF tests on plate of mold steel S136 are carried out without grinding lubricant to assess the finishing performance and service life of this new SiC magnetic abrasive.The surface roughness(Ra)of the plate worked is rapidly reduced to 0.051μm from an initial value of 0.372μm within 5 min.The MAF test is carried on to find that the service life of this new SiC magnetic abrasive reaches to 155 min.The results indicate that this process presented is feasible to prepare the new SiC magnetic abrasive;and compared with previous magnetic abrasives,the new SiC spherical composite magnetic abrasive has excellent finishing performance,high processing efficiency and longer service life.The presented method to fabricate magnetic abrasive through gas atomization and rapid solidification presented can significantly improve the finishing performance and service life of magnetic abrasive,and provide a more practical approach for large-scale industrial production of magnetic abrasive. 展开更多
关键词 iron-based SiC composite powder gas atomization and rapid solidification spherical composite magnetic abrasive magnetic abrasive finishing(MAF)
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Crystal chemistry and structural design of iron-based superconductors 认领 引用 被引量：10
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作者 蒋好 孙云蕾 +1 位作者 许祝安 曹光旱 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第8期135-145,共11页
The second class of high-temperature superconductors （HTSCs）, iron-based pnictides and chalcogenides, necessarily contain Fe2X2 （＂X＂ refers to a pnictogen or a chalcogen element） layers, just like the first clas... The second class of high-temperature superconductors （HTSCs）, iron-based pnictides and chalcogenides, necessarily contain Fe2X2 （＂X＂ refers to a pnictogen or a chalcogen element） layers, just like the first class of HTSCs which possess the essential CuO2 sheets. So far, dozens of iron-based HTSCs, classified into nine groups, have been discovered. In this article, the crystal-chemistry aspects of the known iron-based superconductors are reviewed and summarized by employing ＂hard and soft acids and bases （HSAB）＂ concept. Based on these understandings, we propose an alternative route to exploring new iron-based superconductors via rational structural design. 展开更多
关键词 iron-based superconductors crystal chemistry structural design
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Towards advanced removal of organics in persulfate solution by heterogeneous iron-based catalyst:A review 认领 引用 被引量：3
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作者 Baihui Cui Tingting Tian +5 位作者 Luchun Duan Hongwei Rong Zhihua Chen Shiyi Luo Dabin Guo Ravi Naidu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2024年第12期163-175,共13页
Heterogeneous iron-based catalysts have drawn increasing attention in the advanced oxidation of persulfates due to their abundance in nature,the lack of secondary pollution to the environment,and their low cost over t... Heterogeneous iron-based catalysts have drawn increasing attention in the advanced oxidation of persulfates due to their abundance in nature,the lack of secondary pollution to the environment,and their low cost over the last a few years.In this paper,the latest progress in the research on the activation of persulfate by heterogeneous iron-based catalysts is reviewed from two aspects,in terms of synthesized catalysts(Fe0,Fe2O3,Fe3O4,FeOOH)and natural iron ore catalysts(pyrite,magnetite,hematite,siderite,goethite,ferrohydrite,ilmenite and lepidocrocite)focusing on efforts made to improve the performance of catalysts.The advantages and disadvantages of the synthesized catalysts and natural iron ore were summarized.Particular interests were paid to the activation mechanisms in the catalyst/PS/pollutant system for removal of organic pollutants.Future research challenges in the context of field application were also discussed. 展开更多
关键词 Activated persulfate Iron-based catalysts Iron ore-based catalysts Aactive free radicals Organic pollutants Heterogeneous catalysts
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Research progress of alkaline earth metal iron-based oxides as anodes for lithium-ion batteries 认领 引用 被引量：4
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作者 Mingyuan Ye Xiaorui Hao +6 位作者 Jinfeng Zeng Lin Li Pengfei Wang Chenglin Zhang Li Liu Fanian Shi Yuhan Wu 《Journal of Semiconductors》 EI CAS CSCD 2024年第2期21-33,共13页
Anode materials are an essential part of lithium-ion batteries(LIBs),which determine the performance and safety of LIBs.Currently,graphite,as the anode material of commercial LIBs,is limited by its low theoretical cap... Anode materials are an essential part of lithium-ion batteries(LIBs),which determine the performance and safety of LIBs.Currently,graphite,as the anode material of commercial LIBs,is limited by its low theoretical capacity of 372 mA·h·g−1,thus hindering further development toward high-capacity and large-scale applications.Alkaline earth metal iron-based oxides are considered a promising candidate to replace graphite because of their low preparation cost,good thermal stability,superior stability,and high electrochemical performance.Nonetheless,many issues and challenges remain to be addressed.Herein,we systematically summarize the research progress of alkaline earth metal iron-based oxides as LIB anodes.Meanwhile,the material and structural properties,synthesis methods,electrochemical reaction mechanisms,and improvement strategies are introduced.Finally,existing challenges and future research directions are discussed to accelerate their practical application in commercial LIBs. 展开更多
关键词 alkali-earth metal iron-based oxides anodes lithium-ion batteries electrochemical energy storage
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Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review 认领 引用 被引量：52
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作者 Jie He Xiaofang Yang +1 位作者 Bin Men Dongsheng Wang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2016年第1期97-109,共13页
The heterogeneous Fenton reaction can generate highly reactive hydroxyl radicals（·OH）from reactions between recyclable solid catalysts and H2O2 at acidic or even circumneutral pH.Hence,it can effectively oxidiz... The heterogeneous Fenton reaction can generate highly reactive hydroxyl radicals（·OH）from reactions between recyclable solid catalysts and H2O2 at acidic or even circumneutral pH.Hence,it can effectively oxidize refractory organics in water or soils and has become a promising environmentally friendly treatment technology.Due to the complex reaction system,the mechanism behind heterogeneous Fenton reactions remains unresolved but fascinating,and is crucial for understanding Fenton chemistry and the development and application of efficient heterogeneous Fenton technologies.Iron-based materials usually possess high catalytic activity,low cost,negligible toxicity and easy recovery,and are a superior type of heterogeneous Fenton catalysts.Therefore,this article reviews the fundamental but important interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials..OH,hydroperoxyl radicals/superoxide anions（HO2./O2^-.）and high-valent iron are the three main types of reactive oxygen species（ROS）,with different oxidation reactivity and selectivity.Based on the mechanisms of ROS generation,the interfacial mechanisms of heterogeneous Fenton systems can be classified as the homogeneous Fenton mechanism induced by surface-leached iron,the heterogeneous catalysis mechanism,and the heterogeneous reaction-induced homogeneous mechanism.Different heterogeneous Fenton systems catalyzed by characteristic iron-based materials are comprehensively reviewed.Finally,related future research directions are also suggested. 展开更多
关键词 Heterogeneous Fenton reactions ROS interfacial mechanisms iron-based materials
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Signal Detection of Carbon in Iron-Based Alloy by Double-Pulse Laser-Induced Breakdown Spectroscopy 认领 引用 被引量：5
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作者 林晓梅 李晗 姚清华 《Plasma Science and Technology》 SCIE EI CAS CSCD 2015年第11期953-957,共5页
Although single-pulse lasers are often used in traditional laser-induced breakdown spectroscopy （LIBS） measurements, their measurement outcomes are generally undesirable because of the low sensitivity of carbon in i... Although single-pulse lasers are often used in traditional laser-induced breakdown spectroscopy （LIBS） measurements, their measurement outcomes are generally undesirable because of the low sensitivity of carbon in iron-based alloys. In this article, a double-pulse laser was applied to improve the signal intensity of carbon. Both the inter-pulse delay and the combination of laser wavelengths in double-pulse laser-induced breakdown spectroscopy （DP-LIBS） were optimized in our experiment. At the optimized inter-pulse delay, the combination of a first laser of 532 nm and a second laser of 1,064 nm achieved the highest signal enhancement. The properties of the target also played a role in determining the mass ablation enhancement in DP-LIBS configuration. 展开更多
关键词 DP-LIBS carbon signal detection iron-based alloy
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Common Electronic Features and Electronic Nematicity in Parent Compounds of Iron-Based Superconductors and FeSe/SrTiO_3 Films Revealed by Angle-Resolved Photoemission Spectroscopy 认领 引用 被引量：2
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作者 刘德发 赵林 +22 位作者 何少龙 胡勇 沈兵 黄建伟 梁爱基 徐煜 刘旭 何俊峰 牟代翔 刘单于 刘海云 刘国东 张文号 李坊森 马旭村 薛其坤 陈仙辉 陈根富 俞理 张君 许祖彦 陈创天 周兴江 《Chinese Physics Letters》 SCIE EI CAS CSCD 2016年第7期152-156,共5页
We report comprehensive angle-resolved photoemission investigations on the electronic structures and nematicity of the parent compounds of the iron-based superconductors including CeFeAsO, BaFe2As2, NaFeAs, FeSe and u... We report comprehensive angle-resolved photoemission investigations on the electronic structures and nematicity of the parent compounds of the iron-based superconductors including CeFeAsO, BaFe2As2, NaFeAs, FeSe and undoped FeSe/SrTiO3 films with 1, 2 and 20 layers. While the electronic structure near tile Brillouin zone center F varies dramatically among different materials, the electronic structure near the Brillouin zone corners （M points）, as well as their temperature dependence, are rather similar. The electronic structure near the zone corners is dominated by the electronic nematicity that gives rise to a band splitting of the dxz and dyz bands below the nematie transition temperature. A clear relation is observed between the band splitting magnitude arid the onset temperature of nematicity. Our results may shed light on the origin of nematicity, its effect on the electronic structures, and its relation with superconductivity in the iron-based superconductors. 展开更多
关键词 of on as or by Common Electronic Features and Electronic Nematicity in Parent Compounds of Iron-Based Superconductors and FeSe/SrTiO3 Films Revealed by Angle-Resolved Photoemission Spectroscopy in ARPES As that
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Effect of ball milling time on microstructures and mechanical properties of mechanically-alloyed iron-based materials 认领 引用 被引量：2
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作者 刘东华 刘咏 +4 位作者 赵大鹏 王岩 方京华 温玉仁 刘祖铭 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS 2010年第5期831-838,共8页
The microstructures and mechanical properties of an iron-based alloy (Fe-13Cr-3W-0.4Ti-0.25Y-0.30O) prepared by mechanical alloying were investigated with scanning electron microscope,optical microscope,X-ray diffract... The microstructures and mechanical properties of an iron-based alloy (Fe-13Cr-3W-0.4Ti-0.25Y-0.30O) prepared by mechanical alloying were investigated with scanning electron microscope,optical microscope,X-ray diffractometer and hardness tester.The results show that the particle size does not decrease with milling time because serious welding occurs at 144 h.The density of the alloy sintered at 1 523 K is affected by the particle size of the powder.Finer particles lead to a high sintered density,while the bulk density by using particles milled for 144 h is as low as 70%.In the microstructures of the annealed alloy,large elongated particles and fine equiaxed grains can be detected.The elongated particle zone has a higher microhardness than the equiaxed grain area in the annealed alloys due to the larger residual strain and higher density of the precipitated phase. 展开更多
关键词 iron-based alloy powder mechanical alloying microstructure elongated particles equiaxed grain residual strain
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