Hydrogen storage properties of the supersaturated Mg12YNi solid solution

A supersaturated Mg12YNi solid solution was successfully prepared by melt-spinning technique and its hydrogenation behavior and hydrogen absorption/desorption properties were investigated in detail. It was found that the hydrides of Mg2Ni and Y are formed accompanying the formation of MgH2 during the hydrogenation process at 473–573 K. The hydrides of Mg2Ni and Y have a catalytic effect on the subsequent hydrogen absorption/desorption. Thus, the supersaturated Mg12YNi solid solution has a good activation property and an improved kinetics of hydrogen absorption/desorption.

Research highlights▶ The supersaturated Mg12YNi solid solution was prepared by melt-spinning with a surface velocity of 20 m/s. ▶ The hydrides of Mg2Ni and Y are formed accompanying the formation of MgH2 during the hydrogenation process at 473–573 K ▶ The hydrides of Mg2Ni and Y have a catalytic effect on the hydrogen absorption/desorption ▶ The supersaturated Mg12YNi solid solution has a good activation property and an improved kinetics of hydrogen absorption/desorption.