Preparation of Ti/IrRuSnSbOx Electrodes by a Hydrosol Process for Efficient and Stable Chlorine Evolution Reaction

Chlorine evolution anodes are widely used in industrial electrolysis, whose electrocatalytic activity and stability need to be improved urgently in order to improve energy efficiency. In this study, Ti/IrRuSnSbOx electrodes were fabricated by thermal decomposition of hydrosol precursor solution. The microstructure and electrochemical behavior of the electrodes were investigated by material characterization and electrochemical tests. The results showed that the electrode with a total oxide loading of 1.1 ± 0.5 mg/cm2 had the lowest chlorine evolution potential (1.068 V vs SCE), the lowest Tafel slope (41.08 mV dec–1), and a long accelerating lifetime (405 h). The hydrosol process effectively improved the performance of the electrode by promoting the formation of oxygen vacancies and strengthening the stability of the solid solution structure. This study provided a facile method for preparing chlorine evolution electrodes with low cost, high activity, and high stability.