MgH 2 surface modified with nanosized Ti 0.4 Cr 0.15 Mn 0.15 V 0.3 alloy was prepared by a short ball mill period with hydrogenated Ti 0.4 Cr 0.15 Mn 0.15 V 0.3 alloy. The catalyzed MgH 2 showed attractive absorption/desorption properties, desorbing 5.7 wt % hydrogen in 30 min at 290 °C and absorbing more than 90% of its initial hydrogen capacity with 100 min even at below 100 °C. Moreover, the hydrogen capacity did not show any significant decrease after 73 cycles. It was proposed that the BCC particles with a highly dispersed nanosize and/or amorphous phase on the surface of MgH 2 play a crucial role in significantly improving the kinetic properties of the MgH 2 .
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Yu et al. (2009) studied this question.
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