|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||PbZn 2020: The 9th International Symposium on Lead and Zinc Processing
||Evaluation of Anodic Oxygen Evolution Activity and Durability of MnOx Electrodeposited Catalysts for Zinc Electrowinning
||Sheida Arfania, Edouard Asselin
|On-Site Speaker (Planned)
Zinc electrowinning is the last step of zinc extraction in which high purity zinc is deposited on the cathode. The electrowinning stage is very energy-intensive and responsible for approximately 80% of the power requirement of a zinc refinery. Improving the energy efficiency and lowering the operating costs are of primary significance to the zinc refining plants. Oxygen evolution overpotential on conventional lead-silver anodes contributes to 25% of the total electrowinning cell potential. Thus, lowering anodic overpotential provides much scope for reducing the energy consumption of the zinc electrowinning process. The present project aims to evaluate the activity and durability of anodically electrodeposited manganese oxide catalysts for electrowinning process. The performance of the novel catalyst is evaluated by long-term galvanostatic polarization and various surface characterization techniques. During the 72-hour galvanostatic operation, approximately 80 mV decrease in anodic potential was observed for the electrodeposited electrodes as compared to conventional anodes.