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Title: Releasing 17.8 wt% H 2 from lithium borohydride ammoniate
Authors: Zheng, X.
Wu, G.
Li, W. 
Xiong, Z.
He, T.
Guo, J.
Chen, H.
Chen, P.
Issue Date: Sep-2011
Citation: Zheng, X., Wu, G., Li, W., Xiong, Z., He, T., Guo, J., Chen, H., Chen, P. (2011-09). Releasing 17.8 wt% H 2 from lithium borohydride ammoniate. Energy and Environmental Science 4 (9) : 3593-3600. ScholarBank@NUS Repository.
Abstract: Release of ca. 17.8 wt% of hydrogen was observed from the Co-catalyzed lithium borohydride ammoniate, Li(NH 3) 4/3BH 4 (with equivalent protic and hydridic hydrogen atoms, composed of solid Li(NH 3)BH 4 and liquid Li(NH 3) 2BH 4), in the temperature range of 135 to 250 °C in a closed vessel. The low NH 3 equilibrium vapor pressure of the ammoniate in the vessel results in the retention of the majority of NH 3 in the vicinity of LiBH 4, and thus, creates an environment favorable for the direct dehydrogenation rather than deammoniation. The dehydrogenation is a two-step process forming the intermediates Li 4BN 3H 10 and LiBH 4. The final solid residue is a mixture of BN and Li 3BN 2. The presence of nanosized Co catalyst effectively promote the hydrogen release. © 2011 The Royal Society of Chemistry.
Source Title: Energy and Environmental Science
ISSN: 17545692
DOI: 10.1039/c1ee01480c
Appears in Collections:Staff Publications

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