The simultaneous total oxidation of toluene, propene and CO environmental pollutants using bimetallic AU‐PT/ZrO2/UVM‐7 catalysts

Aggett, Kieran, García, Tomás, Morgan, David ORCID: https://orcid.org/0000-0002-6571-5731, Peláez-Fernández, Mario, Mayoral, Álvaro, Arenal, Raul, Solsona, Benjamín, Amorós, Pedro and Taylor, Stuart ORCID: https://orcid.org/0000-0002-1933-4874 2025. The simultaneous total oxidation of toluene, propene and CO environmental pollutants using bimetallic AU‐PT/ZrO2/UVM‐7 catalysts. ChemCatChem 10.1002/cctc.202401462

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Abstract

Supported precious metal catalysts, containing either mono or bimetallic Au and Pt nanoparticles, anchored on a hierarchical porous UVM‐7 silica structure, were prepared and evaluated for the removal of volatile organic pollutants by oxidation. The catalysts were investigated for the simultaneous total oxidation of three model compounds: propene, toluene and CO, commonly associated with ‘cold start pollutants’ in automotive exhausts. Only Au showed low catalytic activity, whilst Pt nanoparticles were active, with greater concentration of accessible Pt nanoparticles corresponding with increased catalytic activity. Interestingly, having both metals present on the same catalyst together was preferential for producing higher activity in the total oxidation of CO, propene and toluene. The loadings of Pt nanoparticles on the catalyst surface, as well as the synthesis method were important controlling factors. The order of metal loading deposition was influential, depositing Au and Pt sequentially resulted in surface enrichment of the latter deposited metal, leading to enhanced catalytic performance. When Au and Pt were loaded simultaneously, alloy formation occurred and the surface Pt enrichment was more moderate, but still maintaining better catalytic performance compared with the pure Pt catalyst.

Item Type:	Article
Date Type:	Published Online
Status:	In Press
Schools:	Schools > Chemistry Research Institutes & Centres > Cardiff Catalysis Institute (CCI)
Additional Information:	License information from Publisher: LICENSE 1: URL: http://onlinelibrary.wiley.com/termsAndConditions#vor, Start Date: 2025-01-31
Publisher:	Wiley
ISSN:	1867-3880
Date of First Compliant Deposit:	17 February 2025
Date of Acceptance:	30 January 2025
Last Modified:	13 Mar 2025 14:09
URI:	https://orca.cardiff.ac.uk/id/eprint/176248

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