Pentavalent Uranium-Regulated U–Co–Ru Ternary Oxide: High-Efficient Electrocatalyst for Water Splitting
RuO<sub>2</sub> currently serves as a highly advantageous catalyst for water electrolysis. Nonetheless, unstable hypervalent Ru species during the oxidation process can lead to catalyst inactivation. Herein, we report the successful construction of pentavalent uranium-regulated U-Co-Ru ternary oxide with alterable valence states and stable coordination. The dual doping with U and Co significantly enhanced the activity for water splitting in multiple environments, such as acidic, alkaline, and seawater media. The alkaline oxygen evolution reaction could be driven by only 257 and 366 mV at 100 mA cm<sup>-2</sup> and 1 A cm<sup>-2</sup>, respectively. The results of in situ X-ray absorption fine structure analysis revealed that the U-site could act as an interatomic spring and flexibly adapt to the electron transfer through dynamically adjusted U-O bonds and valence state variation. This work represents a path for depleted uranium utilization and, for the first time, elucidates the evolution of pentavalent uranium in the OER processes by synchrotron radiation-based in situ techniques.
Authors
- Yanze Wu (ORCID: https://orcid.org/0000-0002-8734-5997)
- Li‐Yong Yuan (ORCID: https://orcid.org/0000-0003-4261-8717)
- Pengfei An (ORCID: https://orcid.org/0000-0001-7231-4218)
- Lei Mei (ORCID: https://orcid.org/0000-0002-2926-7265)
- Lirong Zheng (ORCID: https://orcid.org/0000-0001-6803-5048)
- Jianrong Zeng (ORCID: https://orcid.org/0000-0003-4867-1893)
- Wei‐Qun Shi (ORCID: https://orcid.org/0000-0001-9929-9732)
- Kong‐Qiu Hu (ORCID: https://orcid.org/0000-0002-8855-108X)
- Lin Wang (ORCID: https://orcid.org/0000-0002-1539-9865)
- Yalan Liu (ORCID: https://orcid.org/0000-0002-1007-7541)
- Zijie Li (ORCID: https://orcid.org/0000-0002-2448-1246)
- Tao Bo (ORCID: https://orcid.org/0000-0002-0154-5454)
- Ziyu Liu (ORCID: https://orcid.org/0000-0002-6066-4373)
Institutions
- Shanghai Jiao Tong University (CN)
- Chinese Academy of Sciences (CN)
- Shanghai Advanced Research Institute (CN)
- Advanced Energy Materials (United States) (US)
- Key Laboratory of Nuclear Radiation and Nuclear Energy Technology (CN)
- Institute of High Energy Physics (CN)
- Cycle (Germany) (DE)
- Ningbo Institute of Industrial Technology (CN)
- Shanghai Synchrotron Radiation Facility
Publication Details
- Journal
- ACS Nano
- Published
- 2025-08-12
- DOI
- https://doi.org/10.1021/acsnano.5c10140
- Citations
- 2
- Primary Topic
- Electrocatalysts for Energy Conversion
- Type
- article
- Field-Weighted Citation Impact
- 0.73
Funders
- National Natural Science Foundation of China