Study on the anode stability of polyaniline with its pyrolysis products as electroactive components and the experimental study of cobalt electrowinning in chloride system

Abstract

In the field of nonferrous metal extraction and wastewater treatment, novel electrode materials have been known as the “heart” of the whole electrochemical innovation process. It can be seen that they play a key innovative role in this process. In this study, the catalytic activity of the novel polyaniline composite electrode material prepared in the laboratory will be comprehensively evaluated, its stability and failure mechanism will be appraised, the mechanism of electrode failure will be described, the ways to improve electrode performance will be put forward, and the superior working performance of the Ti/SnO2-Sb2O5-PANI (9%) electrode material different from the traditional precious metal electrode material will be deeply explored. The research results mainly show that Ti/SnO 2-Sb2O5-PANI (9%) electrode has good stability and can run stably for 186 h when used as anode in electrolysis experiment, while Ti/SnO 2-Sb2O5 electrode has stable operation time of only 114 h. Its failure is mainly caused by the dissolution and falling off of surface coating. In addition, it shows high electrocatalytic activity, low cell voltage of 2.258 V and high current efficiency of 85 ∼ 96% during cobalt electrodeposition experiment.

Keywords

• Novel electrode materials
• Polyaniline composite electrode
• Catalytic activity
• Stability
• Failure mechanism