MOF-derived Ni_(3)Fe/Ni/NiFe_(2)O_(4)@C for enhanced hydrogen storage performance of MgH_(2)  

作　　者：Yangping Chen Bolin Sun Guoqing Zhang Siyuan Ni Canbing Li Juxiong Tian Yanrui Zhang Xinxi Li 

机构地区：[1]School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,Guangdong,China [2]Shen Zhen Source Sensor Technology CO.,Ltd,Shenzhen 518052,Guangdong,China [3]Department of Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [4]China Power Investment Xinjiang Energy&Chemical Group Hotan Co.Ltd,Urumqi 843000,Xinjiang,China

出　　处：《Journal of Energy Chemistry》2025年第2期333-344,I0008,共13页能源化学(英文版)

基　　金：financially supported by the Natural Science Foundation of Guangdong province(2024A1515010228);the Research and demonstration application of intelligent sensing technology for lithium ion battery energy storage(SPICXJ-HTBBC-2022-01).

摘　　要：Magnesium hydride(MgH_(2))is an important material for hydrogen(H_(2))storage and transportation owing to its high capacity and reversibility.However,its intrinsic properties have considerably limited its industrial application.In this study,the NiFe-800 catalyst as metal-organic framework(MOF)derivative was first utilized to promote the intrinsic properties of MgH_(2).Compared to pure MgH_(2),which releases1.24 wt%H_(2)in 60 min at 275℃,the MgH_(2)-10 NiFe-800 composite releases 5.85 wt%H_(2)in the same time.Even at a lower temperature of 250℃,the MgH_(2)-10 NiFe-800 composite releases 3.57 wt%H_(2),surpassing the performance of pure MgH_(2)at 275℃.Correspondingly,while pure MgH_(2)absorbs 2.08 wt%H_(2)in60 min at 125℃,the MgH_(2)-10 NiFe-800 composite absorbs 5.35 wt%H_(2)in just 1 min,Remarkably,the MgH_(2)-10 NiFe-800 composite absorbs 2.27 wt%H_(2)in 60 min at 50℃and 4.64 wt%H_(2)at 75℃.This indicates that MgH_(2)-10 NiFe-800 exhibits optimum performance with excellent kinetics at low temperatures.Furthermore,the capacity of the MgH_(2)-10 NiFe-800 composite remains largely stable after 10cycles.Moreover,the Mg_(2)Ni/Mg_(2)NiH_(4)acts as a"hydrogen pump",providing effective diffusion channels that enhance the kinetic process of the composite during cycling.Additionally,Fe0facilitates electron transfer and creates hydrogen diffusion channels and catalytic sites.Finally,carbon(C)effectively prevents particle agglomeration and maintains the cyclic stability of the composites.Consequently,the synergistic effects of Mg_(2)Ni/Mg_(2)NiH_(4),Fe^(0),and C considerably improve the kinetic properties and cycling stability of MgH_(2).This work offers an effective and valuable approach to improving the hydrogen storage efficiency in the commercial application of MgH_(2).

关 键 词：Hydrogen energy Solid statestorage MOF derivative MgH_(2) CATALYSTS 

分 类 号：TG1[金属学及工艺—金属学]