Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Oxidation of alcohols using supported gold and gold-palladium nanoparticles

Meenakshisundaram, Sankar ORCID:, Nowicka, Ewa ORCID:, Miedziak, Peter John, Brett, Gemma Louise, Jenkins, Robert Leyshon, Dimitratos, Nikolaos ORCID:, Taylor, Stuart H. ORCID:, Knight, David William, Bethell, Donald and Hutchings, Graham John ORCID: 2010. Oxidation of alcohols using supported gold and gold-palladium nanoparticles. Faraday Discussions 145 , pp. 341-356. 10.1039/b908172k

Full text not available from this repository.


A key discovery in the last two decades has been the realisation that gold, when prepared as supported nanoparticles, is exceptionally effective as an oxidationcatalyst, particularly for the oxidation of carbon monoxide at sub-ambient temperature but also for a number of organic reactions of synthetic significance. To some extent this observation is counterintuitive since extended gold surfaces do not chemisorb oxygen, nor do they corrode. For some oxidation reactions, the catalytic activity is markedly enhanced by the addition of palladium. This paper is concerned with recent advances in understanding the mechanism of catalysis by gold–palladium alloy nanoparticles of one such organic reaction, the oxidation of alcohols to the corresponding carbonyl compounds by molecular oxygen. We report detailed reaction studies using a high activity catalyst prepared by sol-immobilisation on a titania support. Using solvent-free conditions, benzyl alcohol is oxidised primarily to benzaldehyde but small amounts of toluene are also formed. The origin of these products is explored using initial rate measurements, deuterium labelling and kinetic isotope effects, and by the study of substituent effects. The effect of changing the nature of the catalyst support is also briefly examined. On the basis of all the results, we consider that we have evidence for multiple reaction pathways in this heterogeneous system. We put forward general mechanisms for the overall processes and describe confirmatory experiments in support of these, and we suggest possible reaction intermediates involved in the heterogeneously catalysed reaction.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Subjects: Q Science > QD Chemistry
Publisher: Royal Society of Chemistry
ISSN: 1364-5498
Last Modified: 06 May 2023 01:32

Citation Data

Cited 127 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item