Tantalum-stabilized ruthenium oxide electrocatalysts for industrial water electrolysis

• 成果类型: Article
• 署名作者: Zhang, Jiahao; Fu, Xianbiao; Kwon, Soonho; Chen, Kaifeng; Liu, Xiaozhi; Yang, Jin; Sun, Haoran; Wang, Yanchang; Uchiyama, Tomoki; Uchimoto, Yoshiharu; Li, Shaofeng; Li, Yan; Fan, Xiaolong; Chen, Gong; Xia, Fanjie; Wu, Jinsong; Li, Yanbo; Yue, Qin; Qiao, Liang; Su, Dong; Zhou, Hua; Goddard, William A., III; Kang, Yijin
• 署名单位: Sichuan University; University of Electronic Science & Technology of China; California Institute of Technology; University of Electronic Science & Technology of China; Chinese Academy of Sciences; Institute of Physics, CAS; Kyoto University; Technical University of Denmark; United States Department of Energy (DOE); Argonne National Laboratory; Lanzhou University; Nanjing University; Collaborative Innovation Center of Advanced Microstructures (CICAM); Nanjing University; Wuhan University of Technology
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8307
• DOI: 10.1126/science.ado9938
• 发表日期: 2025-01-03
• 页码: 48-55
• 关键词: dependent oxygen evolution; ruo2; performance; dissolution; reduction; corrosion; iro2

摘要

The iridium oxide (IrO2) catalyst for the oxygen evolution reaction used industrially (in proton exchange membrane water electrolyzers) is scarce and costly. Although ruthenium oxide (RuO2) is a promising alternative, its poor stability has hindered practical application. We used well-defined extended surface models to identify that RuO2 undergoes structure-dependent corrosion that causes Ru dissolution. Tantalum (Ta) doping effectively stabilized RuO2 against such corrosion and enhanced the intrinsic activity of RuO2. In an industrial demonstration, Ta-RuO2 electrocatalyst exhibited stability near that of IrO2 and had a performance decay rate of similar to 14 microvolts per hour in a 2800-hour test. At current densities of 1 ampere per square centimeter, it had an overpotential 330 millivolts less than that of IrO2.