Dehydriding property of NaBH₄combined with Mg₂FeH₆

The dehydriding property of xNaBH₄+ (1-x) Mg₂FeH₆(x = 0.10.75) is measured to investigate the effect of combining with complex hydride Mg₂FeH₆on reducing dehydriding temperature of metal borohydrides, which has lately been found to be effective for LiBH₄. When x = 0.1 and 0.125, a single-step dehydriding reaction is observed, while in the composition range x ≥0.25, a multi-step dehydriding reaction is observed. Despite the different dehydriding process, X-ray diffraction measurements confirmed that Mg₂FeH₆and NaBH₄began releasing hydrogen simultaneously over the entire composition range. The results also indicate that the dehydriding temperature of NaBH₄is reduced by at least 150K when combining with Mg₂FeH₆.