文献类型：期刊文献

英文题名：ZIF-67-Derived Co-Based DSA Electrodes with Oxygen Vacancies for Degradation of 4-Nitrophenol in a 3D Electrocatalytic System

作者：Song, Xinyi[1];Wang, Lin[2];Zhao, Yibo[1];Shi, Minqin[1];Yuan, Peiqing[3];Xu, Xinru[1];Yang, Jingyi[1]

机构：[1]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Meilong Rd 130, Shanghai 200237, Peoples R China;[2]Shanghai Baosteel New Bldg Mat Technol Co LTD, Mohe Rd 301, Shanghai 201900, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, Meilong Rd 130, Shanghai 200237, Peoples R China

年份：2025

卷号：10

期号：23

外文期刊名：CHEMISTRYSELECT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001508013400001)】；

基金：The authors are grateful to the National Natural Science Foundation of China (22178113).

语种：英文

外文关键词：p-nitrophenol; Degradation mechanism; Electrocatalytic oxidation; ZIF-67

摘要：p-Nitrophenol (4-NP) is a highly toxic and poorly biodegradable phenolic pollutant. In this study, a novel dimensionally stable anode (DSA), ZIF-67 derivative/Ti-x, was synthesized via a coating-calcination method using ZIF-67 as the precursor, and combined with steel slag particles to construct a 3D electrocatalytic system. Among the prepared electrodes, ZIF-67 derivative/Ti-450 exhibited the best performance, featuring uniform cobalt distribution, high Co(II) content, abundant oxygen vacancies, and chemisorbed oxygen. Electrochemical characterization revealed that Ti-450 had the highest oxygen evolution potential (1.71 V vs. SCE), the lowest charge transfer resistance (29.08 Omega), and the smallest Tafel slope (521 mVdec(-)(1)), indicating excellent catalytic activity. Under optimized operating conditions, the degradation efficiency of 4-NP reached 94.72% within 60 min. Mechanistic analysis showed that indirect oxidation was the dominant pathway, contributing 49.80% to the total degradation, followed by direct oxidation (33.35%) and adsorption on steel slag (11.57%). These results demonstrate the great potential of ZIF-67-derived electrodes coupled with steel slag in efficient 3D electrocatalytic systems for the removal of refractory organic pollutants from wastewater.