Multi-Domain versus Single-Domain: A Magnetic Field is Not a Must for Promoting Spin-Polarized Water Oxidation

Jingjie Ge, Xiao Ren, Riccardo Ruixi Chen, Yuanmiao Sun, Tianze Wu, Samuel Jun Hoong Ong, Zhichuan J. Xu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

The reaction kinetics of spin-polarized oxygen evolution reaction (OER) can be enhanced by ferromagnetic (FM) catalysts under an external magnetic field. However, applying a magnetic field necessitates additional energy consumption and creates design difficulties for OER. Herein, we demonstrate that a single-domain FM catalyst without external magnetic fields exhibits a similar OER increment to its magnetized multi-domain one. The evidence is given by comparing the pH-dependent increment of OER on multi- and single-domain FM catalysts with or without a magnetic field. The intrinsic activity of a single-domain catalyst is higher than that of a multi-domain counterpart. The latter can be promoted to approach the former by the magnetization effect. Reducing the FM catalyst size into the single-domain region, the spin-polarized OER performance can be achieved without a magnetic field, illustrating an external magnetic field is not a requirement to reap the benefits of magnetic catalysts.

Original languageEnglish
Article numbere202301721
JournalAngewandte Chemie - International Edition
Volume62
Issue number26
DOIs
Publication statusPublished - Jun 26 2023
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

ASJC Scopus Subject Areas

  • Catalysis
  • General Chemistry

Keywords

  • Ferromagnetic Catalyst
  • Magnetic Domain
  • Magnetic Field
  • Spin Polarization
  • Water Oxidation

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