“…In particular, magnesium hydride, MgH 2 , has been drawing worldwide attention for several reasons: abundant resource, low-cost performance, light weight, safety, and a large hydrogen storage capacity of 7.6 mass% [5][6][7][8]. However, temperatures higher than 300°C are required for the hydrogen desorption reaction, MgH 2 → Mg + H 2 , because of a thermodynamic restriction [1,3,9].…”