Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 21, Pages 10669-10677Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta02754k
Keywords
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Funding
- Natural Science Foundation of Zhejiang Province [LQ15B030003]
- National Natural Science Foundation of China [51501163]
- Natural Science Foundation of Zhejiang University of Technology [2014XZ008]
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A nanostructured nickel-cobalt alloy with an oxide layer was fabricated and its superior catalytic activity towards the electrochemical oxygen evolution reaction in alkaline media was investigated. Firstly, a NiCo-SiO2 composite film was prepared via a potentiostatic electro-codeposition method. Then the SiO2 template was etched and the NiCo component was activated leading to the generation of a (N)iCoOx layer during consecutive CV scans in concentrated alkaline solution. The results show that this nanostructured NiCo alloy with the oxide layer can provide a current density of 100 mA cm(-2) in 1.0 M KOH at a low overpotential of 326 mV and exhibits good stability towards water oxidation. The excellent OER performance is enabled with the unique metal-oxide structure, which allows high electrical conductivity in the metal and high catalytic activity on the oxide.
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