Unraveling Sequential Oxidation Kinetics and Determining Roles of Multi-Cobalt Active Sites on Co 3 O 4 Catalyst for Water Oxidation
Dalian Institute of Chemical Physics · Chinese Academy of Sciences · +3 more institutions
Abstract
The multi-redox mechanism involving multi-sites has great implications to dictate the catalytic water oxidation. Understanding the sequential dynamics of multi-steps in oxygen evolution reaction (OER) cycles on working catalysts is a highly important but challenging issue. Here, using quasi-operando transient absorption (TA) spectroscopy and a typical photosensitization strategy, we succeeded in resolving the sequential oxidation kinetics involving multi-active sites for water oxidation in OER catalytic cycle, with Co3O4 nanoparticles as model catalysts. When OER initiates from fast oxidation of surface Co2+ ions, both surface Co2+ and Co3+ ions are active sites of the multi-cobalt centers for water oxidation.…
Citation impact
- FWCI
- 11.91
- Percentile
- 100%
- References
- 55
Authors
10- WKWanchao Kang
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Lanzhou University
- RWRuifang Wei
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy
- HYHeng Yin
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy
- DLDongfeng Li
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, University of Chinese Academy of Sciences
- ZCZheng Chen
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy
Topics & keywords
- Chemistry
- Catalysis
- Oxygen evolution
- Cobalt
- Kinetics
- Redox
- Chemical kinetics
- Catalytic cycle
- Clean water and sanitation