Laassiri, Said, Zeinalipour-Yazdi, Constantinos D. ORCID: 0000-0002-8388-1549, Catlow, C. Richard A. and Hargreaves, Justin S. J. (2016) Nitrogen transfer properties in tantalum nitride based materials. Catalysis Today, 286. pp. 147-154. ISSN 0920-5861 (doi:https://doi.org/10.1016/j.cattod.2016.06.035)

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Abstract

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:	Article
Additional Information:	© 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license(http://creativecommons.org/licenses/by/4.0/)
Uncontrolled Keywords:	tantalum nitride, nitrogen activation, ammonia synthesis
Subjects:	Q Science > QD Chemistry
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Science (SCI)
Last Modified:	05 Oct 2018 11:32
URI:	http://gala.gre.ac.uk/id/eprint/21479

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