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J. Mater. Chem., 2009, 19, 8426 - 8431, DOI: 10.1039/b915851k

Ambient temperature hydrogen desorption from LiAlH4–LiNH2 mediated by HMPA

Xueli Zheng, Weiliang Xu, Zhitao Xiong, Yongshen Chua, Guotao Wu, Song Qin, Hua Chen and Ping Chen

By adding a small amount of HMPA approximately 2.5 equivalent or ca. 8.1 wt% H2 can be released from the LiAlH4–LiNH2 mixture at ambient temperature, which is 370 °C lower than the corresponding solid-state dehydrogenation. NMR characterizations reveal the formation of intermediates, such as [AlH] and [AlN] species, during the dehydrogenation. LiNH2 induces the enrichment of [AlH] species in the liquid phase which further reacts with LiNH2 to produce H2, Li2NH and Al.

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