The preparation of a residue-free, alumina-supported gold catalyst by decomposition of an azido-gold(III) complex and an evaluation of the effectiveness of the catalyst for the hydrogenation of propyne

Lopez-Sanchez, J. A., Morisse, C., Winfield, J. M., Krumm, B., Klapötke, T. M. and Lennon, D. (2015) The preparation of a residue-free, alumina-supported gold catalyst by decomposition of an azido-gold(III) complex and an evaluation of the effectiveness of the catalyst for the hydrogenation of propyne. Zeitschrift für Anorganische und Allgemeine Chemie, 641(3-4), pp. 694-698. (doi:10.1002/zaac.201400506)

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Abstract

A 1 % w/w alumina-supported gold catalyst is described that is prepared from the impregnation of alumina with a solution of ammonium tetraazidoaurate(III), NH4[Au(N3)4]. Decomposition of the azide precursor leads to a residue-free catalyst comprised of well-dispersed gold particles. This novel material is tested for propyne hydrogenation using pulse-flow techniques and displays 100 % selectivity to the partial hydrogenation product, propene, albeit in the presence of a large retention of hydrocarbon by the catalyst. The latter characteristic is associated with a support-mediated deactivation pathway. Comparing catalytic performance with a 1.45 % w/w Au/TiO2 reference catalyst indicates that chlorine-free precursor compounds are not required to enhance catalytic activity for this particular reaction.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lennon, Professor David and Winfield, Professor John and Morisse, Mr Clement
Authors: Lopez-Sanchez, J. A., Morisse, C., Winfield, J. M., Krumm, B., Klapötke, T. M., and Lennon, D.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Zeitschrift für Anorganische und Allgemeine Chemie
Publisher:Wiley - V C H Verlag GmbH & Co. KGaA
ISSN:0044-2313
ISSN (Online):1521-3749

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
442801Towards a molecular understanding of deactivation issues in methane reforming catalystsDavid LennonEngineering & Physical Sciences Research Council (EPSRC)EP/E028861/1CHEM - CHEMISTRY