Hydrogen Storage in Magnesium Hydride: The Molecular Approach

摘要

Safe and convenient storage of hydrogen is one of the near-future challenges. For mobile applications there are strict volume and weight limitations, and these limitations have steered investigations in the direction of compact, solid, lightweight main-group hydrides. Whereas ammonia-borane (NH3BH3) is a nontoxic, nonflammable, releasing solid with a record hydrogen density of 19.8 wt %, it releases hydrogen in an irreversible process. Metal hydrides such as MgH2 are less rich in hydrogen (7.7 wt %) but advantageously display reversible hydrogen release and uptake: MgH2=Mg + H2.