Nitrogen transfer properties in tantalum nitride based materials

Laassiri, S., Zeinalipour-Yazdi, C. D., Catlow, C. R. A. and Hargreaves, J. S.J. (2017) Nitrogen transfer properties in tantalum nitride based materials. Catalysis Today, 286, pp. 147-154. (doi: 10.1016/j.cattod.2016.06.035)

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Ta3-xMxNy (M = Re, Fe, Co; x = 0, 0.25, 0.5, 1) materials with different microstructural features (e.g. surface area) were successfully prepared using different synthesis techniques. The dependence of nitrogen transfer properties upon tantalum nitride microstructure and its chemical composition was evaluated using the ammonia synthesis with a H2/Ar feedstream (a reaction involving lattice nitrogen transfer). It was shown that nitrogen reactivity for tantalum nitride is more dominated by lattice nitrogen stability rather than microstructural properties. In the case of non-doped tantalum nitride, only a limited improvement of reactivity with enhanced surface area was observed which demonstrates the limited impact of microstructure upon reactivity. However, the nature of the transition metal dopant as well as its content was observed to play a key role in the nitrogen transfer properties of tantalum nitride and to impact strongly upon its reactivity. In fact, doping tantalum nitride with low levels of Co resulted in enhanced reactivity at lower temperature.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Laassiri, Dr Said and Hargreaves, Professor Justin
Authors: Laassiri, S., Zeinalipour-Yazdi, C. D., Catlow, C. R. A., and Hargreaves, J. S.J.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Catalysis Today
ISSN (Online):1873-4308
Published Online:05 July 2016
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Catalysis Today 286:147-154
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
652781First principles design of novel ammonia synthesis catalystsJustin HargreavesEngineering & Physical Sciences Research Council (EPSRC)EP/L02537X/1CHEM - CHEMISTRY