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

Abstract

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/IrRuSnSbO x 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/cm 2 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.

Preparation of Ti/SnO2–Sb–Ir–Mn Electrodes with Low Iridium Content for a Highly Efficient and Stable Oxygen Evolution Reaction

“…Recently, the metal oxide semiconductor, SnO 2 , has drawn great attention for its excellent stability in electrolytes. − Doping a little Sb in SnO 2 can significantly reduce the band gap of SnO 2 and improve its conductivity; therefore, SnO 2 –Sb becomes an excellent candidate for reducing the amount of novel metal used. In many studies, − the SnO 2 –Sb–Ir catalyst with low iridium content is fabricated and studied in-depth. Wu et al fabricated a series of Ti/SnO 2 –Sb–Ir electrodes with 0.7 mg/cm 2 of total oxide loading, which is nearly the lowest among the current electrodes.…”