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Solvent-free aerobic oxidation of alcohols using supported gold palladium nanoalloys prepared by a modified impregnation method

Morad, Moataz, Meenakshisundaram, Sankar, Cao, Enhong, Nowicka, Ewa, Davies, Thomas E., Miedziak, Peter John, Morgan, David John, Knight, David William, Bethell, Donald, Gavriilidis, Asterios and Hutchings, Graham John 2014. Solvent-free aerobic oxidation of alcohols using supported gold palladium nanoalloys prepared by a modified impregnation method. Catalysis Science & Technology (9) , pp. 3120-3128. 10.1039/c4cy00387j

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Abstract

The synthesis of stable, supported, bimetallic nanoalloys with controlled size, morphology and composition is of great practical importance. Compared to their monometallic analogues, such materials exhibit remarkable enhancement in functional properties, which can be exploited in various fields including catalysis. Recently, we have reported a simple excess anion modification of the impregnation method to prepare supported gold–palladium catalysts which gives very good control over the particle sizes and the composition without using any stabilizer ligands in the preparation. Here, we report the results from a comparative study of using this modified impregnation catalyst for the solvent-free aerobic oxidation of alcohols in two different reactors: a glass stirred reactor and a micro packed bed reactor under batch and continuous mode respectively. These modified impregnation catalysts are exceptionally active and more importantly, when tested in a micro packed bed reactor under flow conditions, are observed to be stable for several days without any sign of deactivation in contrast to the same catalyst prepared by the sol immobilization method in the presence of stabilizer ligands which showed a 3–5% decrease in conversion over 10–12 h.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Cardiff Catalysis Institute (CCI)
Chemistry
Publisher: Royal Society of Chemistry
ISSN: 2044-4753
Last Modified: 17 May 2019 21:21
URI: http://orca.cf.ac.uk/id/eprint/61932

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