Boosting the hydrogen storage performance of magnesium hydride with metal organic framework-derived Cobalt@Nickel oxide bimetallic catalyst

作     者：Yan Zhang Jiaguang Zheng Zhiyu Lu Mengchen Song Jiahuan He Fuying Wu Liuting Zhang Yan Zhang;Jiaguang Zheng;Zhiyu Lu;Mengchen Song;Jiahuan He;Fuying Wu;Liuting Zhang

作者机构：School of Energy and PowerJiangsu University of Science and TechnologyZhenjiang 212003China Analysis and Testing CenterJiangsu University of Science and TechnologyZhenjiang 212003China State Key Laboratory of Silicon MaterialsDepartment of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2022年第52卷第12期

页      面：161-171页

核心收录：

学科分类：081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：financial supports from the National Natural Science Foundation of China(51801078) the Natural Science Foundation of Jiangsu Province(BK20210884) 

主　　题：Hydrogen Absorption Catalyst MgH_(2) Bimetallic materials Synergistic effect 

摘      要：In this study,a MOF-derived bimetallic Co@NiO catalyst was synthesized and doped into MgH_(2)to improve the hydrogen desorption and resorption *** Co@NiO catalyst decreased the onset dehydrogenation temperature of MgH_(2)by 160℃,compared with un-doped MgH_(2).The MgH^(2+)9%(mass)Co@NiO composite released 6.6%(mass)hydrogen in 350 s at 315℃and uptook 5.4%(mass)hydrogen in500 s at 165℃,showing greatly accelerated de/rehydrogenation ***,the desorption activation energy of MgH^(2+)9%(mass)Co@NiO was decreased to(93.8±8.4)kJ·mol^(-1).Noteworthy,symbiotic Mg_(2)NiH_(4)/Mg_(2)CoH_(5)clusters were in-situ formed from bimetallic precursors and inlaid on MgH_(2)surface,which are considered asmulti-step hydrogen pumps,and provides surface pathways for hydrogen ***,the introduced Mg_(2)NiH_(4)/Mg_(2)CoH_(5)interfaces could provide numerous low energy barrier H diffusion channels,therefore accelerating the hydrogen release and *** research proposes new insights to design high-efficiency bimetallic catalyst for MgH_(2)hydrogen storage.