Air-stable magnesium nickel hydride with autocatalytic and self-protective effect for reversible hydrogen storage

作     者：Zhongliang Ma Yingyan Zhao Zhaohui Wu Qinke Tang Jinlian Ni Yunfeng Zhu Jiguang Zhang Yana Liu Yao Zhang Hai-Wen Li Xiaohui Hu Xinjian Zhu Liquan Li Zhongliang Ma;Yingyan Zhao;Zhaohui Wu;Qinke Tang;Jinlian Ni;Yunfeng Zhu;Jiguang Zhang;Yana Liu;Yao Zhang;Hai-Wen Li;Xiaohui Hu;Xinjian Zhu;Liquan Li

作者机构：College of Materials Science and EngineeringJiangsu Collaborative Innovation Centre for Advanced Inorganic Function CompositesNanjing Tech University30 South Puzhu RoadNanjing 211816China Jiangsu Qianjing New Energy Industrial Technology Research Institute Co.Ltd1 Dangui RoadZhenjiang 212028China School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China Hefei General Machinery Research InstituteHefei230031China WPIInternational Institute for Carbon-Neutral Energy Research(WPI-I2CNER)Kyushu UniversityFukuoka 819-0395Japan 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2022年第15卷第3期

页      面：2130-2137页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(Nos.51771092,52071177,and 21975125) Six Talent Peaks Project in Jiangsu Province(No.2018-XNY-020) the Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions 

主　　题：oxidation resistance autocatalytic self-protective magnesium based hydride hydrogen storage 

摘      要：Among the factors which restrict the large-scale utilization of magnesium-based hydride as a hydrogen storage medium,the high operating temperature,slow kinetics,and air stability in particular are key *** this work,a novel method,namely hydriding combustion synthesis plus short-term mechanical milling followed by air exposure,was proposed to synthesize air stable and autocatalytic magnesium nickel hydride(Mg2NiH4),which shows excellent hydrogen absorption/desorption kinetics,capacity retention and oxidation *** short-term-milled Mg2NiH4 can desorb 2.97 wt.%hydrogen within 500 s at 230℃.Even after exposure under air atmosphere for 67 days,it can still desorb 2.88 wt.%hydrogen within 500 s at 230℃.The experimental and theoretical results both indicated that the surface of as-milled Mg2NiH4 was easy to be oxidized under air ***,the in-situ formed Ni during air exposure of Mg2NiH4 improved the hydrogen desorption kinetics,and the formed surface passivation layer maintained the hydrogen storage capacity and avoided further poisoning,which we called autocatalytic and self-protective *** a novel dual effect modified the reaction activity and oxidation resistance of the air-exposed *** findings provide useful insights into the design and preparation of air stable metal-based hydride for large-scale utilization and long-term storage.