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Deciphering Water Oxidation Catalysts:The Dominant Role of Surface Chemistry over Reconstruction Degree in Activity Promotion

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Nano-Micro Letters 2025年第3期17卷 340-354页

作者： Li An Jianyi Li Yuanmiao Sun Jiamin Zhu Justin Zhu Yeow Seow Hong Zhang Nan Zhang Pinxian Xi * Zhichuan JXu Chun‑Hua Yan State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceFrontiers Science Center for Rare IsotopesCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000People’s Republic of China School of materials Science and engineering Nanyang Technological UniversitySingapore 639798Singapore Faculty of materials Science and Energy engineering Institute of Technology for Carbon NeutralityShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China Key Laboratory of Electromagnetic materials and Devices National Center for International Research On Photoelectric and Energy MaterialsSchool of Materials and EnergyElectron Microscopy CenterYunnan UniversityKunming 650091People’s Republic of China State Key Laboratory of Baiyunobo rare earth Resource researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030People’s Republic of China Beijing national Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsPKU‑HKU Joint Laboratory in Rare Earth Materials and Bioinorganic ChemistryPeking UniversityBeijing 100871People’s Republic of China

Water splitting hinges crucially on the availability of electrocatalysts for the oxygen evolution *** surface reconstruction has been widely observed in perovskite catalysts,and the reconstruction degree has been often correlated with the activity ***,a systematic study on the roles of Fe substitution in activation of perovskite LaNiO_(3)is *** substituting Fe content influences both current change tendency and surface reconstruction ***_(0.9)Fe_(0.1)O_(3)is found exhibiting a volcano-peak intrinsic activity in both pristine and reconstructed among all substituted perovskites in the LaNi_(1-x)Fe_(x)O_(3)(x=0.00,0.10,0.25,0.50,0.75,1.00)*** reconstructed LaNi_(0.9)Fe_(0.1)O_(3)shows a higher intrinsic activity than most reported NiFe-based ***,density functional theory calculations reveal that Fe substitution can lower the O 2p level,which thus stabilize lattice oxygen in LaNi0.9Fe0.1O3 and ensure its long-term ***,it is vital interesting that activity of the reconstructed catalysts relied more on the surface chemistry rather than the reconstruction *** effect of Fe on the degree of surface reconstruction of the perovskite is decoupled from that on its activity enhancement after surface *** finding showcases the importance to customize the surface chemistry of reconstructed catalysts for water oxidation.

关键词： Oxygen evolution reaction Perovskite oxides Doping Activation and reconstruction

Tuning the porosity of {Co12IICo8III（μ3-OH）24（X）}11+ supramolecular frameworks by reaction time for D2/H2 separation

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Science China Chemistry 2025年

作者： Zhuozhou Xie Zhu Zhuo Zi-Ang Nan Qing Li Xiufang Li Zi-Xiu Lu Linzhe Lü Jin Liu Luyao Liu Wenjing Wang Wei Wang Daqiang Yuan You-Gui Huang State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Sciences Xiamen Key Laboratory of rare earth Photoelectric functional materials Xiamen Institute of Rare Earth Materials Haixi InstitutesChinese Academy of Sciences State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University

Systematicly tuning the porosities of porous materials is crucial for targeted gas mixture separation,yet it remains a longstanding *** a common strategy,altering the phenylene ring count in the organic building units has been exploited to adjust pore apertures in metal organic frameworks （MOFs） and covalent organic frameworks （COFs）,resulting in only a stepwise pore size variation of approximately 2.8?.Unlike MOFs and COFs,the porosities for supramolecular assembly frameworks are highly dependent on the packings of the molecular building units in the *** above strategy cannot be applied to supramolecular assembly frameworks and other strategies are required to adjust pore apertures in supramolecular frameworks,especially to achieve porous materials with the optimal pore size for D2/H2separation （～3?）.Here,we successfully modulate the porosity of supramolecular frameworks of[CoII1+12CoIII8L12（μ3-OH）24（X）]1clusters （L=mono-deprotonated 1-iminoisoindole-3-amine,X=ClO?4or Cl?） by controlling the duration of self-assembly *** simply adjusting the reaction time,we obtain three[CoII12CoIII8L12（μ3-OH）24（X）]11+supramolecular frameworks:[CoII12CoIII8（μ3-OH）24（ClO4）L12)]·（Cl）4·（HCO2）7（1）,[CoII12CoIII8L12（μ3-OH）24（Cl）]·（ClOI4）4·（Cl）6·（HCO2）·（H2O）10（2）,and[CoI12CoIII8L12（μ3-OH）24（Cl）]·（Cl）11·（H2O）12（3）.The different stacking patterns of the[CoII12CoIII8L12（μ3-OH）24（X）]11+clusters in these frameworks lead to significantly varied stabilities and *** 1 exhibits permanent porosity with interconnected channels and maintains stability under harsh *** contrast,compound 2 is nearly nonporous,and compound 3 becomes unstable upon *** pores of compound 1 show higher affinity to D2than H2,and the pore aperture diameter of compound 1 （～3.06?） meets the optimal porosity for D2/***,compound 1 demonstrates moderate D2/H2separation at 77 K (retention time:～7 min/g for D2/H2/Ne （10/10/80 vol%） in a flow of 5 mL

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提高锌离子电池低温性能和抑制阴极溶解:V2O5的局部结构和电化学串扰控制（英文）

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Science China materials 2025年

作者：王俊鹏刘佳玉富达阙兰芳李明春卢灿忠谢奕明 engineering research Center of Environment-Friendly functional materials Ministry of Education Institute of Materials Physical Chemistry Huaqiao University Xiamen Key Laboratory of rare earth Photoelectric functional materials Xiamen Institute of Rare Earth Materials Haixi Institutes Chinese Academy of Sciences CAS Key Laboratory of Design and Assembly of functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

深入了解温度和相变之间的关系对于提高锌离子电池的电化学效率至关重要.然而,电化学相互作用的复杂性,特别是与长时间结构演变有关的相互作用,仍然是一个谜.在本研究中,我们利用V2O5作为晶体的初始结构模型,通过施加不同的机械研磨强...

深入了解温度和相变之间的关系对于提高锌离子电池的电化学效率至关重要.然而,电化学相互作用的复杂性,特别是与长时间结构演变有关的相互作用,仍然是一个谜.在本研究中,我们利用V2O5作为晶体的初始结构模型,通过施加不同的机械研磨强度来细致地控制晶体缺陷,从而揭开电极反应动力学和整体电化学降解的衰变机制.研究表明,经过研磨的V2O5（GVO）具有稳定的晶体结构,可以抑制钒的溶解/穿梭,减轻电化学过程引起的锌阳极副产物.因此,GVO作为正极材料,在室温和低温下均具有优异的Zn存储容量,在室温和-20℃下分别为380和246 mA h g-1.值得注意的是,GVO阴极在-20℃和1 A g-1条件下,经过1500次循环后,容量保持率为99%,保持比容量为160 mA h g-1这项工作为水锌离子电池（AZIBs）在宽温度范围内的电化学串扰行为提供了新的见解.

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Refrigeration effect of La(FeCoSi)_(13)B_(0.25) compounds and gadolinium metal in reciprocating magnetic refrigerator

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Journal of rare earths 2013年第12期31卷 1163-1167页

作者：程娟刘国栋黄焦宏刘翠兰金培育闫宏伟 national engineering research centre of rare earth metallurgy and functional materials Baotou Research Institute of Rare Earths School of materials Science and engineering Hebei University of Technology

The LaFe11.9–x Cox Si1.1 B0.25 with x=0.9 and x=0.82 compounds were synthesized from commercial purity raw *** magnetic property of LaFe11.9–x Cox Si1.1 B0.25 and Gd particles were tested on the reciprocating refrigerator at the same condition in order to compare the cooling capacity of the two *** results showed that the cooling velocity of Gd was obviously higher than that of LaFe11.9–x Cox Si1.1 *** maximum temperature span was 12.7 oC for LaFe11.0 Co0.9 Si1.1 B0.25,14.9 oC for Gd metal whose mass is the same as that of LaFe11.0 Co0.9 Si1.1 B0.25,8.1 oC for Gd metal whose volume is the same as that of LaFe11.0 Co0.9 Si1.1 *** connection of LaFe11.0 Co0.9 Si1.1 B0.25 and LaFe11.08 Co0.82 Si1.1 B0.25 had the maximum cooling temperature span of 15.3 oC.

关键词： magnetic refrigeration magnetic temperature span magnetic entropy change adiabatic temperature change rare earths

Applications of X-ray fluorescence analysis of rare earths in China

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Journal of rare earths 2010年第S1期28卷 30-36页

作者：吴文琪许涛郝茜王强张淑杰赵长玉 national engineering research Center of rare earth metallurgy and functional materials Baotou research Institute of rare earths Inner Mongolia Baotou Steel rare earth Magnetic materials CO. LTD.

A review was presented on the applications of X-ray fluorescence(XRF) analysis in Chinese rare earth industry during the last 20 *** application consisted of the analysis of rare earth elements in ores and soil,concentrates,compounds,metals,alloys,functional materials,fast and online analysis in separation process,and so *** analytical method was described on pressed powders,fused beads,liquid thin films and solid *** detections of rare earth elements and compounds were concerned in iron and steel,nonferrous metals,petrochemical,geology,biology,electronic materials and other fields.

关键词： review XRFA rare earths

Formation cause,composition analysis and comprehensive utilization of rare earth solid wastes

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Journal of rare earths 2009年第6期27卷 1096-1102页

作者：许涛彭会清 Resource & Environment College Wuhan University of Technology national engineering research Center of rare earth metallurgy & functional materials Baotou research Institute of rare earths

Based on practical situation of rare earth industrial chain,production process and rare earth materials that could produce solid wastes on batch were *** cause,formation volume,composition analysis and comprehensive utilization of the solid wastes of rare earth hydrometallurgy slag,electrolysis slag,Fe-based rare earth permanent magnetic materials,Co-based rare earth permanent magnetic materials,rare earth hydrogen storage materials,rare earth polishing powders and rare earth catalysts were ...

关键词： rare earths solid wastes comprehensive utilization

Study on the preparation process of large particle cerium oxide

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Journal of rare earths 2010年第S1期28卷 136-138页

作者：马莹王宝荣李莉娜乔军苏允兰王笃金王晶晶 national engineering research Center of rare earth metallurgy and functional materials Baotou research Institute of rare earths Institute of Chemistry Chinese Academy of Sciences

The large particle cerium oxide was prepared using oxalic acid as precipitation agent. The effects of preparation conditions on the particle size of cerium oxide were discussed. The results showed that the particle size of cerium oxide could be controlled effectively by the temperature,acidity of the solution,aging time,etc. The optimized preparation process of large particle cerium oxide was obtained. The cerium oxide with size between 50 μm to 150 μm was prepared by the process. Moreover,the cerium oxide particles were dispersed uniformly.

关键词： large particle cerium oxide rare earths

Effect of praseodymium substitution for lanthanum on structure and properties of La_(0.65-x)Pr_xNd_(0.12)Mg_(0.23)Ni_(3.4)Al_(0.1)(x=0.00–0.20) hydrogen storage alloys

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Journal of rare earths 2009年第2期27卷 244-249页

作者：闫慧忠孔繁清熊玮李宝犬李金 Ruike national engineering research Center of RE metallurgy & functional materials Baotou 014030China Baotou research Institute of rare earth Baotou 014030China

In order to investigate the effect of substituting La with Pr on structural and hydrogen storage properties of La-Mg-Ni system （AB3.5-type） hydrogen storage alloys, a series of La0.65-xPrxNd0.12Mg0.23Ni3.4Al0.1（x=0, 0.10, 0.15, 0.2） hydrogen storage alloys were prepared. X-ray diffraction （XRD）, scanning electron microscopy （SEM） and energy dispersive spectrometer （EDS） analyses revealed that two alloys （x=0.0 and 0.10） were composed of （La,Mg）2（Ni,Al）7 phase, La（Ni,A1）5 phase and （La,Mg）Ni2 phase, while other alloys （x=0.15 and 0.20） consisted of （La,Mg）2（Ni,A1）7 phase, La（Ni,A1）5 phase, （La,Mg）Ni2 phase and （La,Mg）（Ni,A1）3 phase. All alloys showed, however, only one pressure plateau in P-C isotherms. The Pr/La ratio in alloy composition influenced hydrogen storage capacity and kinetics properties. Electrochemical studies showed that the discharge capacity decreased from 360 mAh/g （x=-0.00） to 335 mAh/g （x=-0.20） as x increased. But the high-rate dischargeability （HRD） of alloy electrodes increased from 26% （x=0.00） to 56% （x=-0.20） at a discharge current density of Id=1800 mA/g. Anode polarization measurements were done to further understand the electrochemical kinetics properties after Pr substitution.

关键词： hydrogen storage alloy La-Mg-Ni system metal hydrides MH/Ni batteries electrochemical properties rare earths

Recovery of rare earth and cobalt from Co-based magnetic scraps

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Journal of rare earths 2010年第S1期28卷 485-488页

作者：许涛张晓东林忠吕保义马春梅高晓玲 Baotou research Institute of rare earth national engineering research Center of rare earth metallurgy and functional materials Inner Mongolia Baotou Steel rare earth Hi-Tech Co. Ltd. Baotou Environmental Protection Bureau School of Chemistry and Chemical engineering Inner Mongolia University

The reuse of RE and cobalt in Co-based magnetic scraps was *** optimized feat lixiviated condition was:200 mesh,sulfuric acid dosage was of 1.4 times theoretic dosage,temperature was 80 oC and leaching time 1 *** optimum technology conditions was:Na2S2O8 dosage was of 8 times theoretic dosage,oxidation temperature 80 oC,oxidation time 2 h and pH=*** earth was precipitated by saturated(NH4)2C2O4 solution,after roasting of rare earth oxalate,rare earth oxide was ***-iron residue was soaked by hydrochloric acid,the Fe(OH)3 was preferential solution,pH was adjusted to 1.4 by hydrochloric acid,Co(OH)3 did not dissolve,cobalt and iron were separated,after roasting of Co(OH)3,cobalt oxide was *** total recovery of cobalt was found to be 97% and rare earths was 96%.

关键词： cobalt-based magnetic scrap cobalt rare earths