Two-step facile synthesis of Co₃O₄@C reinforced PbO₂ coated electrode to promote efficient oxygen evolution reaction for zinc electrowinning

Abstract

We synthesized a PbO2-coated electrode consisting of three layers, with Pb–0.6%Sb alloy as the substrate, α-PbO2 as the intermediate layer, and the outermost β-PbO2-Co3O4@C as the active layer for boosting OER activity.

Mn-doped Co3O4 for acid, neutral and alkaline electrocatalytic oxygen evolution reaction

“…12 Cobalt oxides (CoO x ) present high catalytic activity for OER in alkaline solution, especially the Co 3 O 4 spinel that has been widely investigated as an attractive anode material with high activity, corrosion resistance in alkaline electrolytes, excellent redox property originating from its Co 2+ /Co 3+ mixed valence nature. 1,3,5,6,[13][14][15] Furthermore, the development of acid-stable OER electrocatalysts is still a challenge. 5 The electrolyte pH has a signicant impact on the choice of the electrocatalyst, for instance, for the application of proton exchange membrane (PEM) electrolyzer for hydrogen production at acid pH, active and resistant catalysts are necessary.…”