articleNature CommunicationsMar 14, 2023GOLD OA

Unraveling oxygen vacancy site mechanism of Rh-doped RuO2 catalyst for long-lasting acidic water oxidation

YWYi WangRYRong YangYDYajun DingBZBo ZhangHLHao Li

Dalian Institute of Chemical Physics · Chinese Academy of Sciences · +5 more institutions

PubMed
Indexed incrossrefdoajpubmed

Abstract

Abstract Exploring durable electrocatalysts with high activity for oxygen evolution reaction (OER) in acidic media is of paramount importance for H 2 production via polymer electrolyte membrane electrolyzers, yet it remains urgently challenging. Herein, we report a synergistic strategy of Rh doping and surface oxygen vacancies to precisely regulate unconventional OER reaction path via the Ru–O–Rh active sites of Rh-RuO 2 , simultaneously boosting intrinsic activity and stability. The stabilized low-valent catalyst exhibits a remarkable performance, with an overpotential of 161 mV at 10 mA cm −2 and activity retention of 99.2% exceeding 700 h at 50 mA cm −2 . Quasi in situ/operando characterizations demonstrate…

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Topics & keywords

Topics
Keywords
  • Oxygen evolution
  • Overpotential
  • Catalysis
  • Oxygen
  • Electrolyte
  • Chemistry
  • Adsorption
  • Vacancy defect
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