Breaking the Activity‐Stability Trade‐Off of RuO 2  via Metallic Ru Bilateral Regulation for Acidic Oxygen Evolution Reaction | Zendy

Lu Qian | Zendy; Liu Jinjie | Zendy; Zou Xiaohong | Zendy; Huang Birou | Zendy; Wu Weixing | Zendy; Yin Jun | Zendy; Liu ZhaoQing | Zendy; Wang Ying | Zendy

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Breaking the Activity‐Stability Trade‐Off of RuO 2 via Metallic Ru Bilateral Regulation for Acidic Oxygen Evolution Reaction

Author(s) -

Lu Qian,

Liu Jinjie,

Zou Xiaohong,

Huang Birou,

Wu Weixing,

Yin Jun,

Liu ZhaoQing,

Wang Ying

Publication year - 2025

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.202503733

Subject(s) - oxygen evolution , deprotonation , catalysis , chemistry , oxygen , metal , inorganic chemistry , kinetics , electrochemistry , organic chemistry , electrode , ion , physics , quantum mechanics

Abstract Developing highly efficient acidic oxygen evolution reaction (OER) electrocatalysts is crucial for proton exchange membrane water electrolyzer. RuO 2 electrocatalysts, which followed a kinetically favorable lattice oxygen mechanism, perform a preferable intrinsic activity, but poor stability for acidic OER. Recent work often sacrifices the intrinsic activity of RuO 2 to enhance stability. The balance between the activity and stability of RuO 2 ‐based catalysts is still overlooked in current research. Here, we report a controlled method to introduce metallic Ru onto RuO 2 catalysts to form the Ru 4+ ─O─Ru 0 interfacial structure for decreasing the Ru 4+ oxidation state and promoting deprotonation kinetics. Metallic Ru can serve as the electron donor to lower the oxidation state of *V o ‐RuO 4 2− in Ru/RuO 2 for stabilizing the structure of *V o ‐RuO 4 2− ‐Ru/RuO 2 to favour the acidic OER stability. Moreover, the deprotonation kinetics via the interfacial oxygen site between Ru 4+ and Ru 0 is significantly enhanced on Ru/RuO 2 catalysts to improve the acidic OER activity. This work offers a unique perspective to balance the acidic OER activity and stability of RuO 2 .

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