低载量IrO<sub>2</sub>-RuO<sub>2</sub>酸性析氧催化剂的制备和性能研究

doi:10.19976/j.cnki.43-1448/TF.2025024

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摘要本文以碳纤维纸(carbon fiber paper, CFP)为载体,通过水热法、原位电化学置换反应和高温煅烧制备不同Ir/Ru原子比的低载量IrO₂-RuO₂/Co₃O₄@CFP催化剂,采用扫描电子显微镜、高分辨透射电子显微镜、X射线衍射仪、X射线光电子能谱仪以及电化学测试等手段,研究催化剂的微观结构和电化学性能。结果表明：当Ir/Ru原子比为4∶1时,催化剂在酸性介质中表现出最佳的析氧反应催化活性和稳定性,在电流密度为10 mA/cm²时的析氧过电位为225 mV,Tafel斜率为45.97 mV/dec,在100 mA/cm²电流密度下连续反应50 h后,性能几乎无衰减。本研究可为低成本、高性能的酸性析氧催化剂的合成提供设计思路和可行方案。

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	白宗哲
	李丽
	雷霆

关键词 ：四氧化三钴, 二氧化铱, 二氧化钌, 析氧反应, 置换反应, 稳定性

Abstract：In this paper, carbon fiber paper (CFP) was used as the carrier to prepare low-loading IrO₂-RuO₂/Co₃O₄@CFP catalysts with different Ir/Ru atomic ratios through hydrothermal, in-situ electrochemical displacement reaction, and high-temperature calcination. The microstructure and electrochemical performance of the catalysts were characterized by scanning electron microscope, high-resolution transmission electron microscope, X-ray diffractometer, X-ray photoelectron spectrometer, and electrochemical measurements. The results show that the catalyst with an Ir/Ru atomic ratio of 4∶1 exhibits the optimal oxygen evolution reaction catalytic activity and stability in acidic media. It achieves an oxygen evolution overpotential of 225 mV at a current density of 10 mA/cm² and a Tafel slope of 45.97 mV/dec. Moreover, no obvious performance degradation is observed after continuous reaction for 50 h at a current density of 100 mA/cm². This study can provide design ideas and feasible strategies for the synthesis of low-cost and high-performance acidic oxygen evolution catalysts.

Key words： tricobalt tetraoxide iridium dioxide ruthenium dioxide oxygen evolution reaction displacement reaction stability

收稿日期: 2025-03-17 出版日期: 2025-10-13

ZTFLH:

O643.36+1

通讯作者: 雷霆,教授,博士。电话：15974242599;E-mail: tlei@mail.csu.edu.cn

引用本文:

白宗哲, 李丽, 雷霆. 低载量IrO₂-RuO₂酸性析氧催化剂的制备和性能研究[J]. 粉末冶金材料科学与工程, 2025, 30(4): 310-324.
BAI Zongzhe, LI Li, LEI Ting. Preparation and performance study of low-loading IrO₂-RuO₂ acidic oxygen evolution catalysts. Materials Science and Engineering of Powder Metallurgy, 2025, 30(4): 310-324.

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http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2025024 或 http://pmbjb.csu.edu.cn/CN/Y2025/V30/I4/310

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