Electrodeposition of MnO2-doped Pb-0.6%Sb/α-PbO2/β-PbO2 novel composite energy-saving anode for zinc electrowinning

Contradictory role of reactive oxygen species in dissolution-dependent activity of Pb-based anodes in acidic electrooxidation

“…12 Pb-based anodes have been commercially used in the eld of electrodeposition of copper, zinc and manganese due to their low preparation costs and high conductivity. 13,14 However, the application of Pb-based anodes in the concentrated acid environment of the hydrometallurgical process is impeded by Pb corrosion and low OER activity during the electrooxidation process. 15 The high OER overpotential of anodes caused high energy consumption in the zinc electrowinning process.…”

Preparation and Electrochemical Properties of the CF-Ti/β-PbO2 Composite Anode for Zinc Electrowinning

“…Therefore, the primary energysaving measures for zinc electrowinning are lowering the overpotential of the OER of anode and the energy required to produce the PbO 2 layer. 6 To the above objectives, different strategies have been proposed: (1) the use of Pb-(0.5-1 wt%) Ag and complementary active elements. Ca can reduce the decomposition potential and corrosion rate of the lead alloy anode.…”