The influence of pre-treatment gas mixture upon the ammonia synthesis activity of Co-Re catalysts

McAulay, K., Hargreaves, J.S.J. , McFarlane, A., Price, D.J., Spencer, N.A., Bion, N., Can, B., Richard, M., Greer, H.F. and Zhou, W.Z. (2015) The influence of pre-treatment gas mixture upon the ammonia synthesis activity of Co-Re catalysts. Catalysis Communications, 68, pp. 53-57. (doi:10.1016/j.catcom.2015.04.016)

McAulay, K., Hargreaves, J.S.J. , McFarlane, A., Price, D.J., Spencer, N.A., Bion, N., Can, B., Richard, M., Greer, H.F. and Zhou, W.Z. (2015) The influence of pre-treatment gas mixture upon the ammonia synthesis activity of Co-Re catalysts. Catalysis Communications, 68, pp. 53-57. (doi:10.1016/j.catcom.2015.04.016)

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Abstract

CoRe4 catalysts highly active for ammonia synthesis at ambient pressure and 400 °C can be prepared without an ammonolysis stage. Pre-treatments under 3:1 H2:N2 and 3:1 H2:Ar atmospheres are shown to influence catalytic performance with the latter treatment leading to an induction period prior to development of activity upon switching to an ammonia synthesis feedstream providing indirect evidence for formation of an active nitride phase. The difference in behaviour between the two pre-treatment atmospheres is manifested in temperature programmed isotopic exchange experiments where H2:Ar treated material is inactive and its H2:N2 treated counterpart active.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hargreaves, Professor Justin and McAulay, Dr Kate and Price, Dr Daniel and McFarlane, Dr Andrew and Spencer, Mr Nicholas
Authors: McAulay, K., Hargreaves, J.S.J., McFarlane, A., Price, D.J., Spencer, N.A., Bion, N., Can, B., Richard, M., Greer, H.F., and Zhou, W.Z.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Catalysis Communications
Publisher:Elsevier
ISSN:1566-7367
ISSN (Online):1873-3905
Published Online:12 April 2015
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Catalysis Communications 68:53-57
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
591351Controlled ensemble size and elucidation of structure-sensitivity: a new approach in nitride catalysisJustin HargreavesEngineering & Physical Sciences Research Council (EPSRC)EP/J018384/1CHEM - CHEMISTRY
608951Engineering and Physical Sciences Doctoral Training Grant 2012-16Mary Beth KneafseyEngineering & Physical Sciences Research Council (EPSRC)EP/K503058/1VICE PRINCIPAL RESEARCH & ENTERPRISE