In order to increase hydrogen storage capacity of MgH2-based materials, Li3N, LiBH4, Fe, and/or Ti were added. Mixtures with compositions of 50MgH(2)-50Li(3)N, 40Mg-10MgH(2)-50Li(3)N, 68MgH(2)-17LiBH(4)-15Fe, and 70MgH(2)-17LiBH(4)-13Ti were prepared by reactive mechanical grinding and their hydrogen-storage properties were examined. 40Mg-10MgH(2)-50Li(3)N after hydriding-dehydriding cycling contains Mg3N2, LiMgN, LiOH, and MgO, LiH, and NH3 center dot 2H(2)O, suggesting a reaction of 6Mg + 4MgH(2) + 4Li(3)N + 23H(2)O -> Mg3N2 + LiMgN + 11LiOH + 3NH(3)center dot 2H(2)O + 6MgO + 7H(2). 70MgH(2)-17LiBH(4)-13Ti after hydriding-dehydriding cycling contained MgH2, TiH1.924, Mg, and MgO. Among the samples studied, 70MgH(2)-17LiBH(4)-13Ti had the highest hydriding rate in the beginning. The as-milled 70MgH(2)-17LiBH(4)-13Ti sample absorbed 3.33 wt% H for 5 min, 3.83 wt% H for 10 min, and 3.94 wt% H for 60 min at 573 K under 12 bar H-2. (C) 2012 Elsevier Ltd. All rights reserved.