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

Carter, James H., Shah, Parag M., Nowicka, Ewa ORCID: https://orcid.org/0000-0001-7449-2720, Freakley, Simon J., Morgan, David ORCID: https://orcid.org/0000-0002-6571-5731, Golunski, Stan and Hutchings, Graham J. ORCID: https://orcid.org/0000-0001-8885-1560 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:	07 Nov 2024 22:20
URI:	https://orca.cardiff.ac.uk/id/eprint/123546

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