Issue 2, 2022

Redox reaction does not facilitate oxygen evolution on bismuth ruthenate pyrochlore

Abstract

Pyrochlore oxides (A2B2O7) have received great attention as promising candidates for next-generation electrocatalysts because of their superior catalytic activity and high structural stability during the oxygen evolution reaction (OER). However, the catalytic mechanisms of pyrochlore oxides have not been comprehensively revealed yet. Herein, we intensively investigate the redox reactions and changes of local structures of the A- and B-site cations of bismuth ruthenate pyrochlore (Bi2Ru2O7) during the OER by in situ X-ray absorption spectroscopy (XAS) analysis. Particularly, the catalytic activity at bismuth and ruthenium sites could determine the degrees of redox reactions, which compete with oxygen evolution for transferring electrons by the applied potentials during cyclic voltammetry (CV) measurements. Furthermore, we successfully clarify the neighboring atoms of bismuth and ruthenium ions in the first and second coordination shells by Morlet wavelet analysis to reveal the correlation of redox reactions with the consumption of Bi2Ru2O7.

Graphical abstract: Redox reaction does not facilitate oxygen evolution on bismuth ruthenate pyrochlore

Supplementary files

Article information

Article type
Communication
Submitted
23 Oct 2021
Accepted
07 Dec 2021
First published
10 Dec 2021

J. Mater. Chem. A, 2022,10, 561-569

Redox reaction does not facilitate oxygen evolution on bismuth ruthenate pyrochlore

J. Park, H. Jang, S. Y. Lee, J. S. Jeon and M. G. Kim, J. Mater. Chem. A, 2022, 10, 561 DOI: 10.1039/D1TA09116F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements