Mesoporous Single-Crystalline Particles as Robust and Efficient Acidic Oxygen Evolution Catalysts
The scarcity of iridium (Ir) limits its widespread use in acidic oxygen evolution reaction (OER). Herein, mesoporous single-crystalline spinel Co<sub>3</sub>O<sub>4</sub> with atomically dispersed low-valence-state Ir has been developed to enable Ir's efficient and stable utilization. The surface Pourbaix diagram suggests that under acidic OER conditions, O* fully covers both Co<sub>3</sub>O<sub>4</sub>(111) and (110) surfaces, passivating Co sites but enhancing Co<sub>3</sub>O<sub>4</sub>'s structural stability, a benefit further improved by Ir doping. Mesopores offer numerous loading sites for Ir single atoms (13.8 wt %), which activate the originally O*-passivated Co<sub>3</sub>O<sub>4</sub>(111) surface by creating high-intrinsic-activity Co-Ir bridge sites; meanwhile, Ir and Co leaching rates are reduced to about 1/4 and 1/5, respectively, compared to conventional Ir/Co<sub>3</sub>O<sub>4</sub> catalysts. Our catalyst exhibits a low η<sub>10</sub> of 248 mV for over 100 h, showcasing its potential in water electrolysis.
Authors
- Shangqing Zhao
- Yunpu Qin
- Baorui Jia (ORCID: https://orcid.org/0000-0002-1846-6971)
- Mingli Qin (ORCID: https://orcid.org/0000-0002-4001-6539)
- Yongzhi Zhao (ORCID: https://orcid.org/0000-0002-2509-8089)
- Xuanhui Qu (ORCID: https://orcid.org/0000-0002-2943-3008)
- Luan Liu
- Haoyang Wu (ORCID: https://orcid.org/0000-0002-7372-0872)
- Sijia Liu (ORCID: https://orcid.org/0000-0002-4050-3548)
- Hao Li (ORCID: https://orcid.org/0000-0002-7577-1366)
- Di Zhang (ORCID: https://orcid.org/0000-0001-6347-9344)
- Yong Wang (ORCID: https://orcid.org/0000-0001-8043-5757)
- Yadong Liu (ORCID: https://orcid.org/0000-0001-5373-476X)
- Jie Wang (ORCID: https://orcid.org/0000-0003-3622-536X)
- Jianfang Liu (ORCID: https://orcid.org/0000-0002-7239-8797)
Institutions
- Tohoku University (JP)
- Peking University (CN)
- Guangdong Shunde Innovative Design Institute (CN)
- Advanced Materials and Technologies (Slovenia) (SI)
- Beijing Advanced Sciences and Innovation Center (CN)
- Institute for Materials Research, Tohoku University
- Liaoning Academy of Materials
- University of Science and Technology Beijing (CN)
Publication Details
- Journal
- Journal of the American Chemical Society
- Published
- 2025-04-08
- DOI
- https://doi.org/10.1021/jacs.4c18390
- Citations
- 54
- Primary Topic
- Electrocatalysts for Energy Conversion
- Type
- article
- Field-Weighted Citation Impact
- 19.63
Funders
- Hirose Foundation
- National Natural Science Foundation of China
- China Scholarship Council
- Japan Society for the Promotion of Science
- National Key Research and Development Program of China
- Fundamental Research Funds for the Central Universities
- Institute for Materials Research, Tohoku University
- Basic and Applied Basic Research Foundation of Guangdong Province