Magnesium metal nano composites- A solid state hydrogen storage material

Researchers have focused on nanostructure materials in the last decade, which can play an essential role in storing hydrogen gas. Hydrogen is a future source of energy, having handling and storage challenges. In the new generation, solid-state materials have been used to store hydrogen gas as a metal hydride. Based on materials properties, Mg hydride is the most promising material to store hydrogen in a solid-state material. The theoretical hydrogen storage capacity of magnesium hydride is 7.6 wt% making it a more suitable material for hydrogen storage in the future. Instead of having high storage capacity, magnesium's practical application as a hydride is limited due to its low kinetics and high working temperature. Aside from the less thermo-stability of bulk MgH2, to achieve the maximum hydrogen storage capacity the decomposition required a higher temperature of about 300 °C with 1 bar pressure. As a result, it is necessary to optimize the stability of hydrogen and magnesium molecules to enhance kinetic and thermodynamic properties. The critical factors in improving hydrogenation properties are decreasing particle size (nano-scale) and adding various catalysts.