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

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 RuO₂ 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.