Achieving High OER Performance by Tuning the Co/Mn Content in Prussian Blue Analogues
The need for efficient, economical, and clean energy systems is increasing, and as a result, interest in water-splitting techniques to produce green hydrogen is also increasing. However, the sluggish kinetics of the oxygen evolution reaction (OER) hinders the practical application and widespread use of water-splitting technologies; therefore, to address this challenge, it is essential to develop cost-effective and efficient OER catalysts. In this work, we have synthesized an inexpensive and tunable FeCoMn Prussian blue analogue (PBAs) as an efficient OER catalyst via a straightforward process. The ratio of the Co and Mn to optimize the electrochemical performance, and as a result, the FeCo<sub>0.41</sub>Mn<sub>0.42</sub> PBA catalyst demonstrated the best electrochemical performance (260/304 mV overpotential at 10/50 mA cm<sup>-2</sup>, a low Tafel slope of 48 mV dec<sup>-1</sup> and a good stability of 72 h at 10 mA cm<sup>-2</sup>). Additionally, X-ray absorption spectroscopy (XAS) measurements and density functional theory (DFT) calculations suggest that the FeCo<sub>0.41</sub>Mn<sub>0.42</sub> PBA possesses the optimized electronic density distribution at the active site (Co), and the doping of Mn and Fe can not only increase the electricity conductivity but also activate the critical H<sub>2</sub>O deprotonation step.
Authors
- Weishen Yang (ORCID: https://orcid.org/0000-0001-9615-7421)
- Aaron Timothy Marshall (ORCID: https://orcid.org/0000-0002-3530-7251)
- Jiazhao Wang (ORCID: https://orcid.org/0000-0002-1407-2166)
- Lingfei Zhao (ORCID: https://orcid.org/0000-0003-3683-4210)
- Shailendra Kumar Sharma (ORCID: https://orcid.org/0000-0003-1097-9286)
- Jian Peng (ORCID: https://orcid.org/0000-0002-4624-054X)
- Laura J. Titheridge (ORCID: https://orcid.org/0009-0004-7032-573X)
- Hang Zhang (ORCID: https://orcid.org/0009-0004-5290-5167)
- Jinsong Wang (ORCID: https://orcid.org/0000-0002-2897-665X)
- Jiayang Li (ORCID: https://orcid.org/0000-0002-5551-7424)
- Zhengtao Li (ORCID: https://orcid.org/0009-0002-0142-6006)
- Yameng Fan (ORCID: https://orcid.org/0009-0001-3724-5218)
- Campbell Tiffin (ORCID: https://orcid.org/0009-0006-7702-8361)
- Chang Wu (ORCID: https://orcid.org/0000-0001-6423-8278)
Institutions
- Kunming University of Science and Technology (CN)
- Western University (CA)
- Dalian Institute of Chemical Physics (CN)
- University of Canterbury (NZ)
- Chinese Academy of Sciences (CN)
- University of Wollongong (AU)
- Faculty (United Kingdom) (GB)
- Division of Materials Science and Engineering (AU)
- Hongzhiwei Technology (China) (CN)
Publication Details
- Journal
- ACS Applied Materials & Interfaces
- Published
- 2024-10-17
- DOI
- https://doi.org/10.1021/acsami.4c13199
- Citations
- 14
- Primary Topic
- Copper-based nanomaterials and applications
- Type
- article
- Field-Weighted Citation Impact
- 1.64
Funders
- Ministry of Science and Technology of the People's Republic of China
- Ministry of Business, Innovation and Employment