Conte, Marco, Davies, Catherine, Morgan, David John  ORCID: https://orcid.org/0000-0002-6571-5731, Davies, Thomas E., Carley, Albert Frederick, Johnston, Peter and Hutchings, Graham John ORCID: https://orcid.org/0000-0001-8885-1560
2013.
Modifications of the metal and support during the deactivation and regeneration of Au/C catalysts for the hydrochlorination of acetylene.
Catalysis Science and Technology
3
(1)
, pp. 128-134.
10.1039/C2CY20478A
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Abstract
The effect of the gold oxidation state and carbon structure on the activity of Au/C catalysts for the hydrochlorination of acetylene was investigated by a combined approach using TPR, XPS and porosimetry determinations. The activity of the catalyst in the synthesis of vinyl chloride monomer was found to be dependent on the presence of Au3+ species in the catalyst. However, by preparing catalysts with different Au3+ content it was possible to determine the existence of a threshold Au3+ amount, beyond which the excess of Au3+ was not active for the reaction. This was explained by the existence of active sites at the Au/C interface, and not just by the presence of Au3+ species on top of Au nanoparticles, as explained by current models for these catalysts. It was also possible to determine the existence of a subset of Au nanoclusters which do not take part in the reaction, as well as changes in the textural properties of the carbon that can affect its long term reusability.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Research Institutes & Centres > Cardiff Catalysis Institute (CCI) Schools > Chemistry |
| Subjects: | Q Science > QD Chemistry |
| Publisher: | Royal Society of Chemistry |
| ISSN: | 2044-4753 |
| Funders: | Johnson Matthey, WGC |
| Date of First Compliant Deposit: | 30 March 2016 |
| Last Modified: | 14 Nov 2024 08:54 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/51009 |
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