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In situ XAFS of acid-resilient iridate pyrochlore oxygen evolution electrocatalysts under operating conditions

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Burnett, David L., Petrucco, Enrico, Russell, Andrea E., Kashtiban, Reza J., Sharman, Jonathan D. B. and Walton, Richard I. (2020) In situ XAFS of acid-resilient iridate pyrochlore oxygen evolution electrocatalysts under operating conditions. Physical Chemistry Chemical Physics . doi:10.1039/D0CP01378A (In Press)

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Official URL: https://doi.org/10.1039/D0CP01378A

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Abstract

Pyrochlore iridates (Na,Ca)<sub>2-x</sub>Ir<sub>2</sub>O<sub>6</sub>?H<sub>2</sub>O are acid-stable electrocatalysts that are candidates for use in electrolysers and fuel cells. Ir L<sub>III</sub>-edge X-ray absorption fine structure spectroscopy in 1 M H<sub>2</sub>SO<sub>4</sub> at oxygen evolution conditions suggests the involvement of the electrons from the conduction band of the metallic particles, rather than just surface iridium reacting.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > Chemistry
Library of Congress Subject Headings (LCSH): Conducting polymers, Fuel cells, Proton exchange membrane fuel cells, Electrocatalysis, Polyelectrolytes
Journal or Publication Title: Physical Chemistry Chemical Physics
Publisher: Royal Society of Chemistry
ISSN: 1463-9076
Official Date: 2020
Dates:
DateEvent
2020Published
18 May 2020Available
22 April 2020Accepted
Date of first compliant deposit: 6 May 2020
DOI: 10.1039/D0CP01378A
Status: Peer Reviewed
Publication Status: In Press
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/K503204/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
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