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June 20, 2026Energy & Fuels

Tailoring Oxygen Evolution Reaction Pathway in Layered Perovskite Oxide via Defect Engineering

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Authors

ZHZuyun HeCJChenghao JiaCZChenyu Zhou

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Overview

Randomized trial demonstrates enhanced oxygen evolution reaction activity through defect engineering in layered oxides, implying improved energy applications.

Key Points

  • This work aims to explore how regulating oxygen vacancy concentration can influence the oxygen evolution reaction pathway.
  • Demonstrated the regulation of oxygen vacancy concentration in La 1.5 Sr 0.5 CoO 4−δ thin films through Ar + ion irradiation.
  • Used turnover frequency as a measure of catalytic activity at a specified overpotential.
  • Analyzed the mechanisms differentiating oxygen evolution pathways.
  • Achieved a turnover frequency of 1.154 s –1 at 0.5 V overpotential, a 17-fold increase over pristine LSC.
  • Findings indicate that moderate oxygen vacancies enhance activity through a transition from adsorbate evolution mechanism to lattice-oxygen-mediated mechanism.
  • Excessive vacancies revert the system back to the less active adsorbate evolution mechanism.

Cite This Study

He et al. (2026) studied this question.

synapsesocial.com/papers/6a362e62db0793dc1a536189https://doi.org/10.1021/acs.energyfuels.6c01493
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