催化学报 ›› 2026, Vol. 83: 363-375.DOI: 10.1016/S1872-2067(26)64970-4

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通过铜诱导的表面重构动态调节钌催化剂中酸性析氧反应途径

Hyunseok Yoona,1, Hee Jo Songb,1, Yumin Parka, Andi Haryantoc, Dohun Kimd, Kyuri Choe, Chanyeon Kimd, Wooyul Kime, Chan Woo Leec, Dong-Wan Kima,*()   

  1. a韩国大学土木、环境与建筑工程学院, 首尔, 韩国
    b世宗大学纳米技术与先进材料工程系, 首尔, 韩国
    c国民大学化学系, 首尔, 韩国
    d大邱庆北科学技术院, 能源科学与工程系, 大邱, 韩国
    e韩国能源技术研究所能源工程系, 全罗南道那州, 韩国
  • 收稿日期:2025-09-11 接受日期:2025-11-04 出版日期:2026-04-18 发布日期:2026-03-04
  • 通讯作者: * 电子信箱: dwkim1@korea.ac.kr (D.-W. Kim).
  • 作者简介:1共同第一作者.

Dynamic tuning of acidic oxygen evolution reaction pathways in Ru catalysts via Cu-induced surface restructuring

Hyunseok Yoona,1, Hee Jo Songb,1, Yumin Parka, Andi Haryantoc, Dohun Kimd, Kyuri Choe, Chanyeon Kimd, Wooyul Kime, Chan Woo Leec, Dong-Wan Kima,*()   

  1. aSchool of Civil, Environmental and Architectural Engineering, Korea University, Seoul 02841, South Korea
    bDepartment of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, South Korea
    cDepartment of Chemistry, Kookmin University, Seoul 02707, South Korea
    dDepartment of Energy Science & Engineering, DGIST, Daegu 42988, South Korea
    eDepartment of Energy Engineering, Korea Institute of Energy Technology (KENTECH), Naju, Jeollanam-do 58330, South Korea
  • Received:2025-09-11 Accepted:2025-11-04 Online:2026-04-18 Published:2026-03-04
  • Contact: * E-mail: dwkim1@korea.ac.kr (D.-W. Kim).
  • About author:1Contributed equally to this work.

摘要:

在酸性介质中实现析氧反应(OER)的高活性和长期稳定性仍然是质子交换膜水电解槽(PEMWE)面临的关键挑战. 本文提出了一种掺Cu的Ru催化剂(CuRu-250, 退火温度在250 °C), 该催化剂在操作过程中通过动态表面调制, 表现出优异的性能. Cu不仅是一种静态掺杂剂, 而是通过经历部分溶解和诱导表面重组来积极影响催化剂表面. 这种动态行为使路径从吸附物演化机制调整为氧化物路径机制, 从而促进了中间转换并抑制了Ru的过氧化. 因此, 与未掺杂的Ru和商业RuO2相比, CuRu-250表现出显著提高的耐久性和优异的活性. 单电池PEMWE测试验证了其在实际条件下的催化性能. 这些发现强调了活性掺杂剂行为在调节酸性OER途径和提高电化学稳定性方面的作用, 从而为先进的催化剂设计提供了一种有效的策略.

关键词: 钌, 动态表面重构, 析氧反应, 质子交换膜水电解器, 氧化路径机制

Abstract:

Achieving both high activity and long-term stability for the oxygen evolution reaction (OER) in acidic media remains a critical challenge for proton exchange membrane water electrolyzers (PEMWEs). In this study, we proposed a Cu-incorporated ruthenium (Ru) catalyst (CuRu-250) that exhibited superior performance via dynamic surface modulation during operation. Rather than serving solely as a static dopant, Cu actively influenced the catalyst surface by undergoing partial dissolution and inducing surface restructuring. This dynamic behavior enabled pathway tuning from the adsorbate evolution mechanism to the oxide path mechanism, enhancing the intermediate turnover and suppressing the overoxidation of Ru. Consequently, CuRu-250 demonstrated markedly improved durability and competitive activity compared to undoped Ru and commercial RuO2. Single-cell PEMWE tests validated its catalytic performance under realistic conditions. These findings highlight the role of active dopant behavior in tuning acidic OER pathways and improving electrochemical resilience, thus offering a practical strategy for advanced catalyst design.

Key words: Ruthenium, Dynamic surface restructuring, Oxygen evolution reaction, Proton exchange membrane water electrolyzer, Oxide path mechanism