Insight into catalytic performance and reaction mechanism for toluene total oxidation over Cu-Ce supported catalyst

被引：5
|
作者：
Liang, Xuan [1 ]
Zhang, Jin [1 ]
Tian, Juntai [1 ]
Xie, Zenghua [1 ]
Liu, Yue [1 ]
Liu, Peng [1 ,2 ,3 ,4 ]
Ye, Daiqi [1 ,2 ,3 ,4 ]
机构：
[1] South China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Peoples R China
[2] Natl Engn Lab VOCs Pollut Control Technol & Equipm, Guangzhou 510006, Peoples R China
[3] South China Univ Technol, Guangdong Prov Key Lab Atmospher Environm & Pollut, Guangzhou 510006, Peoples R China
[4] South China Univ Technol, Ctr Environm Risk Prevent & Emergency Disposal, Guangdong Prov Engn & Technol Res, Guangzhou 510006, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL SCIENCES | 2025年 / 149卷
关键词：
Cu-Ce supported catalyst; Copper -cerium interaction; Oxygen vacancies; Toluene oxidation; Reaction mechanism; CO OXIDATION; NO REDUCTION; ACTIVE-SITES; ALUMINA; VOCS;
D O I：
10.1016/j.jes.2024.01.001
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Herein, three supported catalysts, CuO/Al 2 O 3 , CeO 2 /Al 2 O 3 , and CuO-CeO 2 /Al 2 O 3 , were synthesized by the convenient impregnation method to reveal the effect of CeO 2 addition on catalytic performance and reaction mechanism for toluene oxidation. Compared with CuO/Al 2 O 3 , the T 50 and T 90 (the temperatures at 50% and 90% toluene conversion, respectively) of CuO-CeO 2 /Al 2 O 3 were reduced by 33 and 39 degrees C, respectively. N 2 adsorptiondesorption experiment, XRD, SEM, EDS mapping, Raman, EPR, H 2 -TPR, O 2 -TPD, XPS, NH 3 - TPD, Toluene-TPD, and in -situ DRIFTS were conducted to characterize these catalysts. The excellent catalytic performance of CuO-CeO 2 /Al 2 O 3 could be attributed to its strong coppercerium interaction and high oxygen vacancies concentration. Moreover, in -situ DRIFTS proved that CuO-CeO 2 /Al 2 O 3 promoted the conversion of toluene to benzoate and accelerated the deep degradation path of toluene. This work provided valuable insights into the development of efficient and economical catalysts for volatile organic compounds. (c) 2024 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
引用
收藏
页码：476 / 487
页数：12
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