Issue 6, 2009

High capacity hydrogen storage in a hybrid ammonia borane–lithium amide material

Abstract

The direct (solventless) reaction of lithium amide with ammonia borane is described and is demonstrated to form a new hybrid material approximating to LiNH2BH3NH3. This material rapidly loses 3.2 mole equivalents of hydrogen, (11.9 wt%) on heating to 250 °C, with the most rapid hydrogen release occurring at temperatures as low as 60 °C. The product was an insoluble, amorphous polymer with the general formula –(NLi–BNH2)n– which did not rehydrogenate directly on exposure to hydrogen gas pressure. The hybrid material and its decomposition products were characterised by solid state 11B NMR. Selective deuterium labelling helped to elucidate a reaction sequence for the hydrogen release using mass spectrometry of the released gases.

Graphical abstract: High capacity hydrogen storage in a hybrid ammonia borane–lithium amide material

Supplementary files

Article information

Article type
Paper
Submitted
19 Jan 2009
Accepted
23 Mar 2009
First published
30 Mar 2009

Energy Environ. Sci., 2009,2, 706-710

High capacity hydrogen storage in a hybrid ammonia borane–lithium amide material

K. R. Graham, T. Kemmitt and M. E. Bowden, Energy Environ. Sci., 2009, 2, 706 DOI: 10.1039/B901082C

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