Dominant effect of support wettability on the reaction pathway for Catalytic Wet Air Oxidation over Pt and Ru nano-particle catalysts

Davies, Dafydd, Golunski, Stanislaw ORCID: https://orcid.org/0000-0001-7980-8624, Johnston, Peter, Lalev, Georgi and Taylor, Stuart H. ORCID: https://orcid.org/0000-0002-1933-4874 2018. Dominant effect of support wettability on the reaction pathway for Catalytic Wet Air Oxidation over Pt and Ru nano-particle catalysts. ACS Catalysis 10.1021/acscatal.7b04039

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Abstract

Support wettability can play a key role in directing the activation of oxygen during catalytic wet air oxidation over nano-particle catalysts. When the nano-particles are comprised of metallic Pt, the optimum support is hydrophobic, but when they are ionic Ru, a hydrophilic support is more effective. This reversal in support effect is consistent with two distinct surface pathways: one in which gas-phase O2 is directly adsorbed on the Pt0 surface; the other in which dissolved O2 is activated on RuO2 immersed in the contaminated aqueous phase. The known effects of ceria on both catalysts are of secondary importance to support wettability

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Cardiff Catalysis Institute (CCI) Chemistry
Publisher:	American Chemical Society
ISSN:	2155-5435
Funders:	Johnson Matthey and Cardiff University
Date of First Compliant Deposit:	26 February 2018
Date of Acceptance:	22 February 2018
Last Modified:	24 Nov 2024 05:00
URI:	https://orca.cardiff.ac.uk/id/eprint/109460

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