Oxygen‐Containing Amorphous Cobalt Sulfide Porous Nanocubes as High‐Activity Electrocatalysts for the Oxygen Evolution Reaction in an Alkaline/Neutral Medium

Abstract A novel OER electrocatalyst, namely oxygen‐incorporated amorphous cobalt sulfide porous nanocubes (A‐CoS 4.6 O 0.6 PNCs), show advantages over the benchmark RuO 2 catalyst in alkaline/neutral medium. Experiments combining with calculation demonstrate that the desirable O* adsorption energy, associated with the distorted CoS 4.6 O 0.6 octahedron structure and the oxygen doping, contribute synergistically to the outstanding electrocatalytic activity.