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

DOI: 10.1039/D0CP01378A DOI Help

Authors: David Burnett (University of Warwick) , Enrico Petrucco (Johnson Matthey Technology Centre) , Andrea E. Russell (University of Southampton) , Reza J. Kashtiban (University of Warwick) , Jonathan D. B. Sharman (Johnson Matthey Technology Centre) , Richard I. Walton (University of Warwick)
Co-authored by industrial partner: Yes

Type: Journal Paper
Journal: Physical Chemistry Chemical Physics , VOL 38

State: Published (Approved)
Published: May 2020
Diamond Proposal Number(s): 11646

Open Access Open Access

Abstract: Pyrochlore iridates (Na,Ca)2−xIr2O6·H2O are acid-stable electrocatalysts that are candidates for use in electrolysers and fuel cells. Ir LIII-edge X-ray absorption fine structure spectroscopy in 1 M H2SO4 at oxygen evolution conditions suggests the involvement of the electrons from the conduction band of the metallic particles, rather than just surface iridium reacting.

Subject Areas: Chemistry, Energy


Instruments: B18-Core EXAFS

Documents:
d0cp01378a.pdf