高等学校化学学报

高等学校化学学报

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多孔纳米带交织结构Ir1Ru3/TiOxNy薄膜电极的构筑及其酸性析氧反应性能提升机制

王俊杰,王姝颖,杜星,赵雷,李薇馨,何漩,陈辉,王大珩,方伟   

  1. 武汉科技大学材料学部
  • 收稿日期:2025-09-17 修回日期:2025-10-13 网络首发:2025-10-22 发布日期:2025-10-22
  • 通讯作者: 杜星 E-mail:duxing@wust.edu.cn
  • 基金资助:
    国家自然科学基金（22105151, 52305211）、湖北省重点研发计划（2022BAA094）和湖北省自然科学基金（2024AFB836, 2023AFB626，2022CFB626）资助

Rational Design of Porous Nanoribbon-Interwoven Ir1Ru3/TiOxNy Thin Film Electrodes for Enhanced Acidic Oxygen Evolution Reaction

WANG Junjie, WANG Shuying, DU Xing, ZHAO Lei, LI Weixin, HE Xuan, CHEN Hui, WANG Daheng, FANG Wei   

  1. Faculty of Materials，Wuhan University of Science and Technology
  • Received:2025-09-17 Revised:2025-10-13 Online First:2025-10-22 Published:2025-10-22
  • Contact: DU Xing E-mail:duxing@wust.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.22105151, 52305211), the Key Research Program of Hubei Province, China(No.2022BAA094) and the Natural Science Foundation of Hubei Province, China(Nos.2024AFB836, 2023AFB626，2022CFB626)

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摘要： 本文采用减压抽滤结合离子交换-热氮化处理-浸渍还原法制备了无粘结剂的多孔纳米带交织结构Ir1Ru3/TiOxNy薄膜电极. 系统研究了交织结构薄膜微观结构、不同贵金属负载量等对酸性析氧反应催化活性和稳定性的影响规律，探究了无粘结剂时的电子传输和界面处的电荷转移动力学行为，揭示了其析氧性能提升机制. 电化学测试结果显示，在电流密度为 50、100和500 mA cm-2时，贵金属负载量为10.5%的Ir1Ru3/TiOxNy薄膜电极过电位分别为 199、233和 368 mV，且在20 mA cm-2下运行200小时的电压衰减率为0.265 mV h-1，明显优于相同贵金属负载量下使用粘结剂的Ir1Ru3/TiOxNy薄膜电极（278 mV@50 mA cm-2、312 mV@100 mA cm-2、466 mV@500 mA cm-2、100小时衰减率1.7 mV h-1）. 本研究为设计大电流密度下使用的高性能酸性析氧反应电极提供了新的思路.

关键词: 酸性析氧反应, 纳米带交织结构, 多孔结构, 大电流密度

Abstract: The binder-free porous nanoribbon-interwoven Ir1Ru3/TiOxNy thin-film electrode were fabricated through a combined process of reduced-pressure filtration, ion exchange, thermal nitridation and impregnation reduction. Systematic investigations were conducted to elucidate the effects of microstructure and varying precious metal loadings on the catalytic activity and stability for acidic oxygen evolution reaction (OER). The charge transfer dynamics at the interface and electronic transport mechanisms in the binder-free system were comprehensively analyzed, revealing the intrinsic enhancement mechanism for OER performance. Electrochemical characterization demonstrated that the Ir1Ru3/TiOxNy thin-film electrode with a noble metal loading of 10.5 wt% exhibited outstanding OER activity with overpotentials of 199 mV, 233 mV and 368 mV at current densities of 50, 100, and 500 mA cm-2, respectively. Notably, the electrode showed exceptional stability with a minimal voltage decay rate of 0.265 mV h-1 during a 200-hour durability test at 20 mA cm-2. These performance metrics significantly surpassed those of the binder-containing Ir1Ru3/TiOxNy thin-film electrode with identical precious metal loading (278 mV@50 mA cm-2, 312 mV@100 mA cm-2, 466 mV@500 mA cm-2 and a 100-hour decay rate of 1.7 mV h-1). This study provides novel insights into the rational design of high-performance acidic oxygen evolution reaction electrodes for high current densities.

Key words: Acidic oxygen evolution reaction, Nanoribbon-interwoven structure, Porous structure, High current density

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