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Enhanced activity and stability of Gold/Ceria-Titania for the low-temperature water-gas shift reaction

Carter, James H., Shah, Parag M., Nowicka, Ewa, Freakley, Simon J., Morgan, David, Golunski, Stan and Hutchings, Graham J. 2019. Enhanced activity and stability of Gold/Ceria-Titania for the low-temperature water-gas shift reaction. Frontiers in Chemistry 7 , 443. 10.3389/fchem.2019.00443

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Abstract

Gold supported on ceria-zirconia is one of the most active low temperature water-gas shift catalysts reported to date but rapid deactivation occurs under reaction conditions. In this study, ceria-titania was evaluated as an alternative catalyst support. Materials of different Ce:Ti compositions were synthesized using a sol-gel methodology and gold was supported onto these using a deposition-precipitation method. They were then investigated as catalysts for the low-temperature water-gas shift reaction. Au/Ce0.2Ti0.8O2 exhibited superior activity and stability to a highly active, previously reported gold catalyst supported on ceria-zirconia. High activity and stability was found to be related to the support comprising a high number of oxygen defect sites and a high specific surface area. These properties were conducive to forming a highly active catalyst with well-dispersed Au species.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: Frontiers Media
ISSN: 2296-2646
Funders: European Research Council
Date of First Compliant Deposit: 18 June 2019
Date of Acceptance: 29 May 2019
Last Modified: 30 Nov 2019 06:00
URI: http://orca-mwe.cf.ac.uk/id/eprint/123546

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