Variation with added material in the effects of reactive mechanical grinding and hydriding-dehydriding cycling on the hydrogen-storage properties of Mg

► Use of pure Mg instead of MgH2 as one of starting materials. ► Content of additives about 20 wt%. ► Addition of additives Ni, Fe2O3, Ti and/or Fe. ► A larger amount of Ti and/or Fe, stronger effects of RMG. ► A larger amount of Fe2O3, greater effects of hydriding-dehydriding cycling.