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

摘要

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 H_2 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 O_2-dimensionally stable anode (DSA-O_2) by an HDE was studied.