Space charge region induced self-evolution dehydrogenation of polymorphic magnesium-based hydrides

Qinke Tang,Jiangchuan Liu,Mengran Li,Rui Shi,Yunfeng Zhu,Yao Zhang,Jiguang Zhang,Yana Liu, Yijin Wu,Ling Li,Xiaohui Hu,Liquan Li

CHEMICAL ENGINEERING JOURNAL（2023）

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摘要

•Hydrogenation temperature affects the polymorphic composition of Mg2NiH4.•Polymorphic Mg2NiH4 is different in thermology, electricity and microstructure.•The compounds of passivation layer are Ni, Ni(OH)2, NiO, MgO and Mg(OH)2.•Ni/Ni(OH)2 and Ni/NiO in the passivation layer triggers self-evolution.

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关键词

Combustion synthesis-hydrogenation,Mg-based hydrogen storage material,Hydrogen storage performance,Self-evolution,Air stability

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