articleNature CommunicationsJul 26, 2025GOLD OA

High-entropy RuO2 catalyst with dual-site oxide path for durable acidic oxygen evolution reaction

FQFangren QianDCDengfeng CaoSCShuangming ChenYYYalong YuanKCKai Chen

University of Science and Technology of China · Chinese Academy of Sciences · +5 more institutions

PubMed
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Abstract

Developing durable acidic oxygen evolution reaction catalysts is critical for industrial proton exchange membrane water electrolyzers. We incorporate high-entropy atoms (Co, Ni, Cu, Mn, Sm) into RuO2 (RuO2-HEAE) via annealing, achieving remarkably high stability (>1500 h at 100 mA cm−2). In situ differential electrochemical mass spectrometry and operando Attenuated Total Reflection Surface-Enhanced Infrared Absorption Spectroscopy reveal RuO2-HEAE follows a dual-site oxide path mechanism instead of the conventional adsorbate evolution mechanism. Quantitative Fourier-transformed extended X-ray absorption fine structure fitting and density functional theory calculations show this mechanistic shift stems from an…

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Topics & keywords

Topics
Keywords
  • Catalysis
  • Dual (grammatical number)
  • Oxygen
  • Oxygen evolution
  • Chemistry
  • Oxide
  • Path (computing)
  • Materials science
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