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Journal of magnesium
and alloys

Current Issue

Improvement effect of reversible solid solutions Mg2Ni(Cu)/ Mg2Ni(Cu)H4 on hydrogen storage performance of MgH2

Available online 29 June 2022

Full Length Article

Yingyan Zhao; Zhibing Liu; Jiangchuan Liu; Yunfeng Zhu; Jiguang Zhang; Yana Liu; Xiaohui Hu; Liquan Li


The hydrogen absorption/desorption kinetic properties of MgH2 can be effectively enhanced by doping specific catalysts. In this work, MOFs-derived NiCu@C nanoparticles (∼15 nm) with regular core-shell structure were successfully prepared and introduced into MgH2 (denoted as MgH2NiCu@C). The onset and peak temperatures of hydrogen desorption of MgH2–11 wt.% NiCu@C are 175.0 °C and 282.2 °C, respectively. The apparent activation energy of dehydrogenated reaction is 77.2 ± 4.5 kJ/mol for MgH2–11 wt.% NiCu@C, which is lower than half of that of the as-milled MgH2. Moreover, MgH2–11 wt.% NiCu@C displays great cyclic stability. The strengthening “hydrogen pumping” effect of reversible solid solutions Mg2Ni(Cu)/Mg2Ni(Cu)H4 is proposed to explain the remarkable improvement in hydrogen absorption/desorption kinetic properties of MgH2. This work offers a novel perspective for the design of bimetallic nanoparticles and beyond for application in hydrogen storage and other energy related fields.


Magnesium hydride; Reversible solid solution; Core-shell nanoparticles; Hydrogen storage performanc

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