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

DOI: 10.1088/1361-6463/abde67 DOI Help

Authors: Alexander Large (University of Reading) , Jake Seymour (University of Reading) , Wilson Quevedo Garzon (Diamond Light Source) , Kanak Roy (Diamond Light Source) , Federica Venturini (Diamond Light Source) , David C. Grinter (Diamond Light Source) , Luca Artiglia (Paul Scherrer Institut) , Emily Brooke (Johnson Matthey Plc) , Martha Briceno De Gutierrez (Johnson Matthey Plc) , Agnes Raj (Johnson Matthey Plc) , Kevin Lovelock (University of Reading) , Roger A. Bennett (University of Reading) , Tugce Eralp-Erden (Johnson Matthey Plc) , Georg Held (University of Reading)
Co-authored by industrial partner: Yes

Type: Journal Paper
Journal: Journal Of Physics D: Applied Physics

State: Published (Approved)
Published: January 2021
Diamond Proposal Number(s): 19464 , 20952 , 22702 , 24584

Open Access Open Access

Abstract: 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.

Subject Areas: Materials, Chemistry, Physics

Instruments: B07-C-Versatile Soft X-ray beamline: Ambient Pressure XPS and NEXAFS

Other Facilities: Swiss Light Source

Added On: 27/01/2021 22:56


Discipline Tags:

Physics Physical Chemistry Catalysis Chemistry Inorganic Chemistry Nanoscience/Nanotechnology

Technical Tags:

Spectroscopy X-ray Photoelectron Spectroscopy (XPS) Near Ambient Pressure XPS (NAP-XPS)