Operando characterisation of alumina-supported bimetallic Pd–Pt catalysts during methane oxidation in dry and wet conditions

Large, A. ORCID: https://orcid.org/0000-0001-8676-4172, Seymour, J. ORCID: https://orcid.org/0000-0002-1217-9541, Quevedo Garzon, W., Roy, K. ORCID: https://orcid.org/0000-0003-0802-7710, Venturini, F., Grinter, D. C. ORCID: https://orcid.org/0000-0001-6089-119X, Artiglia, L. ORCID: https://orcid.org/0000-0003-4683-6447, Brooke, E., de Gutierrez, M. B., Raj, A., Lovelock, K. R. J. ORCID: https://orcid.org/0000-0003-1431-269X, Bennett, R. A. ORCID: https://orcid.org/0000-0001-6266-3510, Eralp-Erden, T. and Held, G. ORCID: https://orcid.org/0000-0003-0726-4183 (2021) Operando characterisation of alumina-supported bimetallic Pd–Pt catalysts during methane oxidation in dry and wet conditions. Journal of Physics D: Applied Physics, 54 (17). 174006. ISSN 1361-6463 doi: 10.1088/1361-6463/abde67

Abstract/Summary

Near ambient pressure x-ray photoelectron spectroscopy (NAP-XPS) was used to study the chemical states of a range of alumina-supported monometallic Pd and bimetallic Pd–Pt nanocatalysts, under methane oxidation conditions. It has been suggested before that for optimal complete methane oxidation, palladium needs to be in an oxidised state. These experiments, combining NAP-XPS with a broad range of characterisation techniques, demonstrate a clear link between Pt presence, Pd oxidation, and catalyst activity under stoichiometric reaction conditions. Under oxygen-rich conditions this behaviour is less clear, as all of the palladium tends to be oxidised, but there are still benefits to the addition of Pt in place of Pd for complete oxidation of methane.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/96558
Identification Number/DOI	10.1088/1361-6463/abde67
Refereed	Yes
Divisions	Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
Publisher	IOP Publishing
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