Reversible growth of gold nanoparticles in the low-temperature water-gas shift reaction

Carter, James H., Abdel-Mageed, Ali M., Zhou, Dan, Morgan, David J. ORCID: https://orcid.org/0000-0002-6571-5731, Liu, Xi, Bansmann, Joachim, Chen, Shilong, Behm, R. Jürgen and Hutchings, Graham J. ORCID: https://orcid.org/0000-0001-8885-1560 2022. Reversible growth of gold nanoparticles in the low-temperature water-gas shift reaction. ACS Nano 16 , pp. 15197-15205. 10.1021/acsnano.2c06504

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Abstract

Supported gold nanoparticles are widely studied catalysts and are among the most active known for the low-temperature water–gas shift reaction, which is essential in fuel and energy applications, but their practical application has been limited by their poor thermal stability. The catalysts deactivate on-stream via the growth of small Au nanoparticles. Using operando X-ray absorption and in situ scanning transmission electron microscopy, we report direct evidence that this process can be reversed by carrying out a facile oxidative treatment, which redisperses the gold nanoparticles and restores catalytic activity. The use of in situ methods reveals the complex dynamics of supported gold nanoparticles under reaction conditions and demonstrates that gold catalysts can be easily regenerated, expanding their scope for practical application.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Publisher:	American Chemical Society
ISSN:	1936-0851
Funders:	National Key R&D Plan (2021YFA1500300, and 2021YFA1500303) and Natural Science Foundation of China (22072090)
Date of First Compliant Deposit:	6 September 2022
Date of Acceptance:	22 August 2022
Last Modified:	02 May 2023 13:38
URI:	https://orca.cardiff.ac.uk/id/eprint/152388

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