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Enhancing Hydrogen Storage Properties of MgH by Transition Metals and Carbon Materials: A Brief Review

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Journal Front Chem
Specialty Chemistry
Date 2020 Jul 28
PMID 32714898
Citations 10
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Abstract

Magnesium hydride (MgH) has attracted intense attention worldwide as solid state hydrogen storage materials due to its advantages of high hydrogen capacity, good reversibility, and low cost. However, high thermodynamic stability and slow kinetics of MgH has limited its practical application. We reviewed the recent development in improving the sorption kinetics of MgH and discovered that transition metals and their alloys have been extensively researched to enhance the de/hydrogenation performance of MgH. In addition, to maintain the cycling property during the de/hydrogenation process, carbon materials (graphene, carbon nanotubes, and other materials) have been proved to possess excellent effect. In this work, we introduce various categories of transition metals and their alloys to MgH, focusing on their catalytic effect on improving the hydrogen de/absorption performance of MgH. Besides, carbon materials together with transition metals and their alloys are also summarized in this study, which show better hydrogen storage performance. Finally, the existing problems and challenges of MgH as practical hydrogen storage materials are analyzed and possible solutions are also proposed.

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