Room temperature gaseous hydrogen storage properties of Mg-based metallic glasses with ultrahigh Mg contents

Mg–Ce–Ni metallic glasses with record high Mg content larger than 90 at.% were fabricated. Remarkably, the metallic glasses can reversibly absorb and desorb about 0.2–0.4 wt.%-H at room temperature without activation, and the hydrogenation capacity of the glassy Mg-based alloy is twice larger than that of the corresponding crystalline alloy. It is found that hydrogenation capacity shows close connection with the glassy structure of the alloys, and the higher Mg content amorphous structure can store more hydrogen. The work might present a way for gaseous hydrogen storage by metallic glasses media.