Citation: Fei Li, Hua Li, Yong Zhu, Jian Du, Yong Wang, Licheng Sun. Electrocatalytic water oxidation by a nickel oxide film derived from a molecular precursor[J]. Chinese Journal of Catalysis, ;2017, 38(11): 1812-1817. doi: 10.1016/S1872-2067(17)62921-8 shu

Electrocatalytic water oxidation by a nickel oxide film derived from a molecular precursor

Fei Li ^a, ,
Hua Li ^a ,
Yong Zhu ^a ,
Jian Du ^a ,
Yong Wang ^a ,
Licheng Sun ^a,b

a State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology(DUT), Dalian 116024, Liaoning, China;
b Department of Chemistry, School of Chemical Science and Engineering, KTH Royal Institute of Technology, Stockholm 10044, Sweden

Received Date: 30 August 2017
Revised Date: 25 September 2017

Fund Project: This work was supported by the National Basic Research Program of China (973 program, 2014CB239402), the National Natural Science Foundation of China (21476043), and the Swedish Energy Agency and K&A Wallenberg Foundation

In this study, we fabricated a NiO_x film by electrodeposition of an ethanediamine nickel complex precursor (pH=11) on a fluorine-doped tin oxide substrate. The resulting film is robust and exhib-its high catalytic activity for electrochemical water oxidation. Water oxidation is initiated with an overpotential of 375 mV (1 mA/cm²) and a steady current density of 8.5 mA/cm² is maintained for at least 10 h at 1.3 V versus the normal hydrogen electrode. Kinetic analysis reveals that there is a 2e^-/3H⁺ pre-equilibrium process before the chemical rate-determining step. The low-cost preparation, robustness, and longevity make this catalyst competitive for applications in solar energy conversion and storage.
- Electrolysis,
- Nickel oxide,
- Water oxidation,
- Molecular precursor,
- Water splitting
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