Magnesium-based alloys for solid-state hydrogen storage applications: A review

Magnesium hydrides (MgH2) have attracted extensive attention as solid-state H-2 storage, owing to their low cost, abundance, excellent reversibility, and high H-2 storage capacity. This review comprehensively explores the synthesis and performance of Mg-based alloys. Several factors affecting their hydrogen storage performance were also reviewed. The metals addition led to destabilization of Mg-H bonds to boost the dehydrogenation process. A unique morphology could provide more available active sites for the dissociation/recombination of H-2 and allow the activation energy reduction. Also, an appropriate support prevent the agglomeration of Mg particles, hence, sustains their nanosize particles. Moreover, the perspective of avenues for future research presented in this review is expected to act as a guide for the development of novel Mg-based H-2 storage systems. New morphological shape of catalysts, more unexplored and highly potential waste materials, and numerous synthesis procedures should be explored to further enhance the H-2 storage of Mg-based alloys. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.