Studies on dehydrogenation characteristic of Mg(NH2)2/LiH mixture admixed with vanadium and vanadium based catalysts (V, V2O5 and VCl3)

In the present study, we have investigated the effect of vanadium and its compounds (V, V2O5 and VCl3) on desorption characteristics of 1:2 magnesium amide (Mg(NH2)2) and lithium hydride (LiH) mixture. The hydrogen storage characteristics of 1:2 Mg(NH2)2/LiH mixture gets enhanced with admixing of V, V2O5 and VCl3 separately. The VCl3 has been found to be the most effective followed by V and V2O5. The activation energy for dehydrogenation process of 1:2 Mg(NH2)2/LiH mixture with and without catalyst has been evaluated using a method suggested by Ozawa et al. [25]. Based on the experimental results, schematic reaction scheme for decomposition of Mg(NH2)2 in the presence of VCl3 has also been proposed.