Use of hydrogen diffusion anodes during lead electrowinning in a chloride medium

The results of an investigation on the use of a hydrogen diffusion anode (HDE) for electrowinning of lead in chloride medium are reported. Given that lead ions may poison the platinum electrocatalyst of the HDE, the H2 oxidation reaction in the presence of lead ions on a platinum rotating disk electrode (RDE) was studied. Finally, the influence on the lead electric cost of the substitution of the traditionally used O2-dimensionally stable anode (DSA-O2) by an HDE was studied.