文献类型：期刊文献

英文题名：Mechanism and Performance of Electrocatalytic Oxidation on RuO2-IrO2@Ti Anode in Alkaline Phenol Wastewater

作者：Song, Xinyi[1];Yuan, Peiqing[2];Xu, Xinru[1];Yang, Jingyi[1]

机构：[1]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：10

期号：31

起止页码：34471

外文期刊名：ACS OMEGA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001539184900001)】；

基金：We thank the anonymous reviewers for their constructive comments and suggestions. This work was supported by the National Natural Science Foundation of China (grant number 22178113).

语种：英文

摘要：Phenol, a highly biotoxic organic pollutant, is widely present in alkaline wastewater from industries such as petrochemical and coking plants. However, its efficient degradation remains challenging with existing technologies. In this study, a RuO2-IrO2@Ti electrode was fabricated by a coating method, achieving an oxygen evolution potential of 2.0 V vs RHE (Reversible Hydrogen Electrode). Under alkaline conditions (pH = 10) with optimized operating parameters (38 mA/cm2 current density and 0.25 M NaCl electrolyte), the degradation efficiency of 125 mg/L phenol reached 92.33% within 180 min. Mechanistic investigations, including radical quenching experiments, GC-MS analysis of intermediates, and Fukui function-based reactive site analysis, confirmed that indirect oxidation dominated the degradation process. The primary degradation pathway involved electrophilic substitution by ClO-, synergistically enhanced by oxidation via superoxide radicals (center dot O2 -). The electrode exhibited outstanding stability, maintaining a degradation efficiency of 90% after 30 consecutive cycles, while the electrochemically active surface area (ECSA) increased from 0.17 cm2 to 0.44 cm2, demonstrating its potential for industrial applications.