Activated Lead Electrode for Electrowinning of Metals

Rising costs of power forecast the need for effective energy-saving measures in electrolytic extraction of metals, leading to the investigation of a new type of catalytic anode known as activated lead electrode for its application in the electrolytic recovery of metals from aqueous solutions. This study focuses on the development and evaluation of this anode, which is composed of a lead substrate integrated with an electrocatalyst such as IrO2 supported on titanium sponge particles. The methodology includes testing for voltage savings, anodic stability, and tolerance to chloride impurities in the electrolyte, as well as assessing the effects of catalyst poisoning. Results indicate that the activated lead electrode exhibits superior corrosion resistance, lower working potential, and enhanced compatibility with chloride-containing solutions compared to conventional lead anodes. The findings suggest that the implemented technological advancements may significantly improve the efficiency of metal electrowinning processes and provide a commercial advantage by reducing energy consumption. Further explorations into the catalyst's durability and cost-effectiveness are essential for practical applications.