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Issue 7, 2015
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Ammonia decomposition catalysis using non-stoichiometric lithium imide

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Abstract

We demonstrate that non-stoichiometric lithium imide is a highly active catalyst for the production of high-purity hydrogen from ammonia, with superior ammonia decomposition activity to a number of other catalyst materials. Neutron powder diffraction measurements reveal that the catalyst deviates from pure imide stoichiometry under ammonia flow, with active catalytic behaviour observed across a range of stoichiometry values near the imide. These measurements also show that hydrogen from the ammonia is exchanged with, and incorporated into, the bulk catalyst material, in a significant departure from existing ammonia decomposition catalysts. The efficacy of the lithium imide–amide system not only represents a more promising catalyst system, but also broadens the range of candidates for amide-based ammonia decomposition to include those that form imides.

Graphical abstract: Ammonia decomposition catalysis using non-stoichiometric lithium imide

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Publication details

The article was received on 19 Jan 2015, accepted on 07 May 2015 and first published on 07 May 2015


Article type: Edge Article
DOI: 10.1039/C5SC00205B
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Chem. Sci., 2015,6, 3805-3815
  • Open access: Creative Commons BY-NC license
    All publication charges for this article have been paid for by the Royal Society of Chemistry

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    Ammonia decomposition catalysis using non-stoichiometric lithium imide

    J. W. Makepeace, T. J. Wood, H. M. A. Hunter, M. O. Jones and W. I. F. David, Chem. Sci., 2015, 6, 3805
    DOI: 10.1039/C5SC00205B

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