期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 45, 页码 38663-38668出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b12478
关键词
electrocatalyst; oxygen evolution; hydrogen energy; electrolysis; anion-exchange membrane water electrolysis; nanowall arrays
资金
- Fundamental Research Program of the Korean Institute of Materials Science [PNK5630]
We prepare three-dimensional honeycomb-like Cu0.81Co2.19O4 nano sheet arrays supported by Ni foam via electrochemical codeposition of cobalt and copper hydroxides on Ni foam followed by thermal oxidation. The codeposition with Cu changes the morphology of the cobalt hydroxide deposit to form honeycomb-like nanostructures, significantly decreasing the onset potential for oxygen evolution. The Cu0.81Co2.19O4 anode displays an exceptionally low overpotential of 290 mV at a current density of 10 mA cm(-2) in 1 M KOH, and an anion-exchange membrane water electrolysis cell employing the above anode achieves a current density of 100 mA cm(-2) at 1.68 V in 0.1 M KOH.
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