Incorporation of Cu/Ni in Ordered Mesoporous Co-Based Spinels to Facilitate Oxygen Evolution and Reduction Reactions in Alkaline Media and Aprotic Li-O₂ Batteries.

On the other hand, the activity of the Ni‐rich catalysts (NiCo, CuNiCo‐2‐8, CuNiCo‐5‐5) increased remarkably after 200 CV due to the iron uptake from non‐purified KOH solution by the nickel hydr(oxy)oxides formed on the surface of the catalysts during OER and the ensuing formation of highly active Ni−(Fe)−OOH species on the catalyst surface.[ 24 , 50 , 51 ] There is a clear trend in the change of the LSV curves after 200 CVs: the reaction starts at lower potentials for Ni‐rich oxides, whereas high amounts of Cu seem to delay the reaction.

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