Chlorobenzene oxidation by electrochemical catalysis with La modified Ti/ IrO2-Ta2O5

被引：0
作者：
Yuan, Shicheng [1 ]
Chen, Zhongming [1 ,2 ]
Mi, Jinxing [3 ]
Wang, Pan [1 ,4 ]
Zheng, Jiaren [1 ]
Li, Kunpeng [1 ]
Zhang, Mi [1 ]
Zeng, Fan [1 ,5 ]
Hu, Hui [1 ]
Huang, Hao [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Environm Sci & Engn, Hubei Key Lab Multimedia Pollut Cooperat Control Y, Wuhan 430074, Peoples R China
[2] Yancheng City Urban South New Dist Dev & Construct, Fdn Dept, Yancheng 224000, Peoples R China
[3] Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Cont, Beijing 100084, Peoples R China
[4] Hubei Prov Acad Ecoenvironm Sci, Wuhan 430074, Peoples R China
[5] Nanjing Inst Technol, Sch Environm Engn, Nanjing 211167, Peoples R China
来源：
APPLIED CATALYSIS A-GENERAL | 2024年 / 685卷
关键词：
Chlorobenzene oxidation; Electrochemical catalysis; Degradation pathway; Modified electrodes; ELECTRODE; SYSTEM;
D O I：
10.1016/j.apcata.2024.119865
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
As a typical VOCs emitted from petrochemical industry, chlorobenzene was selected to study its removal by wet oxidation with electrochemical catalysis. Ti based IrO2-Ta2O5 electrode was used in the advanced oxidation of chlorobenzene, and Sn, Sb, Pt and La were used to modify Ti/IrO2-Ta2O5. Ti/IrO2-Ta2O5-La showed the highest removal rate of chlorobenzene and it reached 99.2 % for the chlorobenzene oxidation, which was 20 % higher than those of the other 3 additions. Oxygen evolution overpotential of Ti/IrO2-Ta2O5-La increased to 1.17 V when compared with Ti/IrO2-Ta2O5 of 1.08 V. EPR tests for free radicals and GC-MS tests for intermediates showed that the main active substance was center dot OH, and the element Cl in chlorobenzene dissociated from the benzene ring under the action with center dot OH to form center dot Cl and ClO center dot radicals. Degradation pathway of chlorobenzene was figured out as chlorobenzene-* phenols-* organic acids-* CO2+H2O.
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页数：10
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