Ambient temperature hydrogen desorption from LiAlH4–LiNH2 mediated by HMPA

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

doi:10.1039/B915851K

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Journal of Materials Chemistry

Issue 44, 2009

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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

J. Mater. Chem., 2009, 19, 8426-8431

DOI: 10.1039/B915851K
Received 03 Aug 2009, Accepted 10 Sep 2009
First published on the web 01 Oct 2009

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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 [similar] 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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Xueli Zheng
Weiliang Xu
Zhitao Xiong
Yongshen Chua
Guotao Wu
Song Qin
Hua Chen
Ping Chen

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Journal of Materials Chemistry

Ambient temperature hydrogen desorption from LiAlH₄–LiNH₂ mediated by HMPA

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