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Hydrogen evolution and hydrogen oxidation on palladium bismuth alloys

Hydrogen evolution and hydrogen oxidation on palladium bismuth alloys
Hydrogen evolution and hydrogen oxidation on palladium bismuth alloys
Thin film alloys of PdBi have been synthesised using a high throughput physical vapour deposition method to produce compositional gradients of PdBi alloys. XPS indicates that for the non-equilibrated thin films, the surface composition is the same as the bulk, and core level shifts reflect the inter-metallic interaction between the component metals. Hydrogen absorption is hindered in the PdBi alloys, and at a composition of 70 at.% bismuth, the ?Bi2Pd bulk alloy phase is identified in XRD. This phase exhibits a maximum in the hydrogen evolution reaction (HER) and hydrogen oxidation reaction (HOR) electrocatalytic activity. The increased activity of the alloy can be understood in terms of the Pd d-band density of states, and a concomitant increase in the binding energy of hydrogen. There is a strong correlation between the HER and HOR activity as a function of composition across the complete range of alloys. The potential of using the ?Bi2Pd bulk inter-metallic phase at the anode of PEM fuel cells is briefly discussed.
electrocatalysis, alloys, hydrogen evolution reaction, hydrogen oxidation reaction, polymer electrolyte membrane fuel cells
1022-5528
77-82
Al-Odail, Faisal
c040c10b-97bd-4d9d-91a6-18e7db87b7a4
Anastasopoulos, Alexandros
7280a68f-3800-45a0-bbad-0e054707eb3b
Hayden, Brian
aea74f68-2264-4487-9d84-5b12ddbbb331
Al-Odail, Faisal
c040c10b-97bd-4d9d-91a6-18e7db87b7a4
Anastasopoulos, Alexandros
7280a68f-3800-45a0-bbad-0e054707eb3b
Hayden, Brian
aea74f68-2264-4487-9d84-5b12ddbbb331

Al-Odail, Faisal, Anastasopoulos, Alexandros and Hayden, Brian (2011) Hydrogen evolution and hydrogen oxidation on palladium bismuth alloys. Topics in Catalysis, 54 (1-4), 77-82. (doi:10.1007/s11244-011-9650-9).

Record type: Article

Abstract

Thin film alloys of PdBi have been synthesised using a high throughput physical vapour deposition method to produce compositional gradients of PdBi alloys. XPS indicates that for the non-equilibrated thin films, the surface composition is the same as the bulk, and core level shifts reflect the inter-metallic interaction between the component metals. Hydrogen absorption is hindered in the PdBi alloys, and at a composition of 70 at.% bismuth, the ?Bi2Pd bulk alloy phase is identified in XRD. This phase exhibits a maximum in the hydrogen evolution reaction (HER) and hydrogen oxidation reaction (HOR) electrocatalytic activity. The increased activity of the alloy can be understood in terms of the Pd d-band density of states, and a concomitant increase in the binding energy of hydrogen. There is a strong correlation between the HER and HOR activity as a function of composition across the complete range of alloys. The potential of using the ?Bi2Pd bulk inter-metallic phase at the anode of PEM fuel cells is briefly discussed.

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More information

Published date: March 2011
Keywords: electrocatalysis, alloys, hydrogen evolution reaction, hydrogen oxidation reaction, polymer electrolyte membrane fuel cells

Identifiers

Local EPrints ID: 178429
URI: https://eprints.soton.ac.uk/id/eprint/178429
ISSN: 1022-5528
PURE UUID: e940e03a-1a37-4bde-a205-eed8fdacf5ba
ORCID for Brian Hayden: ORCID iD orcid.org/0000-0002-7762-1812

Catalogue record

Date deposited: 24 Mar 2011 15:32
Last modified: 19 Nov 2019 02:03

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