Hydrogen generation performance of novel Al–LiH–metal oxides

Abstract

A series of novel hydrogen production materials, Al–LiH–metal oxide composites, have been prepared via high energy ball milling. The effects of different oxides on the hydrolysis properties of Al–LiH composites for H₂ generation are studied, in which Ga₂O₃ shows the best activation capability among the added oxides such as Ga₂O₃ Bi₂O₃, In₂O₃, TiO₂, ITO, and γ-Al₂O₃. Experimental results indicate that the Al–LiH–Ga₂O₃ composite shows excellent properties for hydrogen production with a related conversion efficiency and maximum hydrogen generation rate (mHG rate) of 98.6% and 3837 mL g⁻¹ min⁻¹ at 298.15 K, respectively. Meanwhile, the activation mechanism of Ga₂O₃ and LiH is investigated by SEM, XRD and so on.