α(β)-PbO2 doped with Co3O4 and CNT porous composite materials with enhanced electrocatalytic activity for zinc electrowinning

3D-Ti/PbO₂–Co₃O₄–CNTs composite electrode was fabricated through galvanostatic electrodepositon, which shows outstanding electrocatalytic activity to OER in harsh media (50 g L⁻¹ Zn²⁺ + 150 g L⁻¹ H₂SO₄).