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Cinnamaldehyde hydrogenation using Au-Pd catalysts prepared by sol immobilisation

Abstract

We report the catalytic performance of Au-Pd nanoparticles prepared via a sol immobilisation technique for the catalytic hydrogenation of cinnamaldehyde under mild reaction conditions. We synthesised a series of bimetallic Au-Pd colloidal supported nanoparticles with different Au:Pd molar ratios and optimized the experimental parameters to achieve best catalyst performance. The optimum catalytic activity for the hydrogenation of cinnamaldehyde was observed for the Au50Pd50/TiO2 (Au:Pd 1:1 molar ratio), while the monometallic Pd/TiO2 was the most selective towards hydrocinnamaldehyde. The catalysts have been structurally characterised and FTIR analysis showed that the presence of adsorbed carbonyl surface species in used catalyst materials coupled with Pd leaching, which is the main reason for catalyst deactivation. The effect of calcination on the most active Au-Pd/TiO2 was studied in the range 110-400 °C and we observed a direct correlation between the rise in calcination temperature and catalyst stability and selectivity. These results emphasise the importance of tuning the Au-Pd molar ratio and understanding the metal-support interaction of catalysts synthesised for hydrogenation reactions, such as cinnamaldehyde hydrogenation.

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Publication details

The article was received on 18 Dec 2017, accepted on 11 Feb 2018 and first published on 12 Feb 2018


Article type: Paper
DOI: 10.1039/C7CY02556D
Citation: Catal. Sci. Technol., 2018, Accepted Manuscript
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    Cinnamaldehyde hydrogenation using Au-Pd catalysts prepared by sol immobilisation

    S. Cattaneo, S. Freakley, D. J. Morgan, M. Sankar, N. Dimitratos and G. Hutchings, Catal. Sci. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C7CY02556D

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