“…Currently, a variety of hydrogen storage materials are being continuously discovered and researched. − Metal or metal intermetallic compounds with high atomic mass are considered typical hydrogen storage materials. ,− In recent years, magnesium hydride (MgH 2 ) has garnered increased attention due to its high hydrogen capacity (7.6 wt %), surpassing the final target established by the US Department of Energy for onboard hydrogen storage systems (6.5 wt %), as well as its excellent reversibility, natural abundance (ranking as the eighth most abundant element in the Earth’s crust), low cost (priced at $3 per kilogram for magnesium), and environmental compatibility, making it as one of the most promising hydrogen storage materials. ,− Nonetheless, MgH 2 continues to face challenges with its high thermal stability (Δ H = 76 kJ/mol) and sluggish dehydrogenation kinetics, which impede its practical application. , To address these limitations, significant efforts have been undertaken, proposing and exploring various effective approaches, including nanomaterials, nanoconfinement, and catalyst doping. ,,− …”