In situ surface analysis of palladium-platinum alloys in methane oxidation conditions

Palladium and palladium-platinum foils were analysed using temperature-programmed near-ambient pressure X-ray photoelectron spectroscopy (TP-NAP-XPS) under methane oxidation conditions. Oxidation of palladium is inhibited by the presence of water, and in oxygen-poor environments. Pt addition further...

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Bibliographic Details
Published in:Faraday discussions 2022-08, Vol.236, p.157-177
Main Authors: Large, Alexander I, Bennett, Roger A, Eralp-Erden, Tugce, Held, Georg
Format: Article
Language:English
Subjects:
Bimetals
Foils
Methane
Oxidation
Palladium
Photoelectrons
Platinum
Platinum base alloys
Pressure
Surface analysis (chemical)
X ray photoelectron spectroscopy
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Summary:Palladium and palladium-platinum foils were analysed using temperature-programmed near-ambient pressure X-ray photoelectron spectroscopy (TP-NAP-XPS) under methane oxidation conditions. Oxidation of palladium is inhibited by the presence of water, and in oxygen-poor environments. Pt addition further inhibits oxidation of palladium across all reaction conditions, preserving metallic palladium to higher temperatures. Bimetallic foils underwent significant restructuring under reaction conditions, with platinum preferentially migrating to the bulk under select conditions.
ISSN:1359-6640
1364-5498
DOI:10.1039/d1fd00113b