Recent progress on bimetallic NiCo and CoFe based electrocatalysts for alkaline oxygen evolution reaction: A review

The deployment of hydrogen as an energy carrier is found to be a vital alternative fuel for the future. It expected that water electrolysis, powered by renewable sources, able scale‐up production. However, reaction kinetic oxygen evolution (OER) sluggish process, which predominantly limits efficiency electrolysis. This review recapitulates recent progress and efforts made in design development two selected earth-abundant bimetallic electrocatalysts (NiCo CoFe) alkaline OER. Each bimetal electrocatalyst thoroughly outlined discussed five sub-sections, including (oxy) hydroxides, Layered double hydroxides (LDHs) structures, oxides, composites, alloy nanostructured electrocatalysts, assembled with heteroatoms. Furthermore, brief introduction situ/operando characterization techniques advantages monitoring structure provided. Finally, summary outlining challenges conceivable approaches advance OER performance highlighted discussed.