Affordable Access

deepdyve-link
Publisher Website

In situ observation of surface species on iridium oxide nanoparticles during the oxygen evolution reaction.

Authors
  • Sanchez Casalongue, Hernan G
  • Ng, May Ling
  • Kaya, Sarp
  • Friebel, Daniel
  • Ogasawara, Hirohito
  • Nilsson, Anders
Type
Published Article
Journal
Angewandte Chemie International Edition in English
Publisher
Wiley (John Wiley & Sons)
Publication Date
Jul 07, 2014
Volume
53
Issue
28
Pages
7169–7172
Identifiers
DOI: 10.1002/anie.201402311
PMID: 24889896
Source
Medline
Keywords
License
Unknown

Abstract

An iridium oxide nanoparticle electrocatalyst under oxygen evolution reaction conditions was probed in situ by ambient-pressure X-ray photoelectron spectroscopy. Under OER conditions, iridium undergoes a change in oxidation state from Ir(IV) to Ir(V) that takes place predominantly at the surface of the catalyst. The chemical change in iridium is coupled to a decrease in surface hydroxide, providing experimental evidence which strongly suggests that the oxygen evolution reaction on iridium oxide occurs through an OOH-mediated deprotonation mechanism.

Report this publication

Statistics

Seen <100 times