Issue 3, 2008

Synthesis of sodium amidoborane (NaNH2BH3) for hydrogen production

Abstract

The prospect of building a future energy system on hydrogen has stimulated much research effort in developing hydrogen storage technologies. One of the potential materials newly developed is sodium amidoborane (NaNH2BH3) which evolves ∼7.5 wt% hydrogen at temperatures as low as 91 °C. In this paper, two methods of synthesizing pure NaNH2BH3 were reported. One method is by reacting NaH and ammonia borane in THF at low temperatures, and the other is by reacting NaNH2 and ammonia borane in THF at ambient temperature. Non-isothermal testing on the thermolysis of solid NaNH2BH3 showed that hydrogen evolution was composed of two exothermic steps. More than 1 equiv. H2 was evolved rapidly at temperatures below 87 °C. After evolving 2 equiv. H2, NaH was identified in solid products and coexisted with amorphous BN.

Graphical abstract: Synthesis of sodium amidoborane (NaNH2BH3) for hydrogen production

Article information

Article type
Paper
Submitted
03 Apr 2008
Accepted
04 Jun 2008
First published
23 Jun 2008

Energy Environ. Sci., 2008,1, 360-363

Synthesis of sodium amidoborane (NaNH2BH3) for hydrogen production

Z. Xiong, G. Wu, Y. S. Chua, J. Hu, T. He, W. Xu and P. Chen, Energy Environ. Sci., 2008, 1, 360 DOI: 10.1039/B805649H

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