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A nanostructured NiCo@NiCoOx core-shell layer for oxygen evolution reaction in alkaline solution was prepared. Firstly, a NiCo-SiO2 composite film was electro-codeposited from a solution containing (NH4)2SiF6, NiSO4, and CoSO4. Then the as-prepared composite layer was underwent consecutive CV scans in concentrated alkaline solution. During this process, the SiO2 template was etched and the NiCo component...
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