Correlating Structural Disorder in Metal (Oxy)hydroxides and Catalytic Activity in Electrocatalytic Oxygen Evolution

Shouwei Zuo, Zhi Peng Wu, Guikai Zhang, Cailing Chen, Yuanfu Ren, Qiao Liu, Lirong Zheng, Jing Zhang, Yu Han*, Huabin Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Understanding the correlation between the structural evolution of electrocatalysts and their catalytic activity is both essential and challenging. In this study, we investigate this correlation in the context of the oxygen evolution reaction (OER) by examining the influence of structural disorder during and after dynamic structural evolution on the OER activity of Fe−Ni (oxy)hydroxide catalysts using operando X-ray absorption spectroscopy, alongside other experiments and theoretical calculations. The Debye–Waller factors obtained from extended X-ray absorption fine structure analyses reflect the degree of structural disorder and exhibit a robust correlation with the intrinsic OER activities of the electrocatalysts. The enhanced OER activity of in situ-generated metal (oxy)hydroxides derived from different pre-catalysts is linked to increased structural disorder, offering a promising approach for designing efficient OER electrocatalysts. This strategy may inspire similar investigations in related electrocatalytic energy-conversion systems.

Original languageEnglish (US)
Article numbere202316762
JournalAngewandte Chemie - International Edition
Volume63
Issue number7
DOIs
StateAccepted/In press - 2023

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • Debye–Waller Factor
  • In Situ XAFS
  • Oxygen Evolution
  • Structural Disorder
  • Structural Evolution

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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