Citation: Hao WANG, Kun TANG, Jiangyang SHAO, Kezhi WANG, Yuwu ZHONG. Electro-copolymerized film of ruthenium catalyst and redox mediator for electrocatalytic water oxidation[J]. Chinese Journal of Inorganic Chemistry, ;2024, 40(11): 2193-2202. doi: 10.11862/CJIC.20240176 shu

Electro-copolymerized film of ruthenium catalyst and redox mediator for electrocatalytic water oxidation

Hao WANG ^{1, 2, #} ,
Kun TANG ^{1, 3, #} ,
Jiangyang SHAO ¹ ,
Kezhi WANG ^2,, ,
Yuwu ZHONG ^{1, 3,,}

1.
Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2.
Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China
3.
School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: Kezhi WANG, kzwang@bnu.edu.cn Yuwu ZHONG, zhongyuwu@iccas.ac.cn
Received Date: 11 April 2024
Revised Date: 20 September 2024

Figures(8)

Electro-copolymerized film containing ruthenium complexes as electron-transfer (or redox) mediators and water-oxidation catalysts by an oxidative copolymerization method is presented. The addition of the redox mediator significantly improved the electrocatalytic water-oxidation activity and reduced the overpotential to 220 mV. The prepared electrode showed a water-oxidation catalytic rate constant k_obs of 31.7 s^-1 and an initial turnover frequency of 1.01 s^-1 in 1 000 s by potential electrolysis at 1.7 V applied bias vs NHE (normal hydrogen electrode). The kinetic isotope effect study suggests that the catalytic water oxidation reaction on the electrode surface occurs via a bimolecular coupling mechanism.
- water oxidation,
- water splitting,
- ruthenium complexes,
- electropolymerization,
- electrocatalysis
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