| Title: | Engineering of oxygen vacancy defect in CeO(2) through Mn doping for toluene catalytic oxidation at low temperature |
| Author(s): | Ismail A; Zahid M; Ali S; Bakhtiar SUH; Ali N; Khan A; Zhu Y; |
| Address: | "Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, China. School of Physics, University of Electronic Science and Technology of China, Chengdu, 610054, PR China. School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Engineering Research Center for Functional Ceramics of the Ministry of Education, Huazhong University of Science and Technology, Wuhan, 430074, PR China. Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan. Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan. Electronic address: adnankhan@uop.edu.pk. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, China. Electronic address: yujunzhu@hlju.edu.cn" |
| DOI: | 10.1016/j.envres.2023.115680 |
| ISSN/ISBN: | 1096-0953 (Electronic) 0013-9351 (Linking) |
| Abstract: | "Catalytic oxidation is considered a highly effective method for the elimination of volatile organic compounds. Oxygen vacancy defect engineering in a catalyst is considered an effective approach for high-performance catalysts. Herein, a series of doped Mn(x)Ce(1-x)O(2) catalysts (x = 0.05-0.2) with oxygen vacancy defects were synthesized by doping low-valent Mn in a CeO(2) lattice. Different characterization techniques were utilized to inspect the effect of doping on oxygen vacancy defect generation. The characterization results revealed that the Mn(0.15)Ce(0.85)O(2) catalyst has the maximum oxygen vacancy concentration, leading to increased active oxygen species and enhanced oxygen mobility. Thus, Mn(0.15)Ce(0.85)O(2) catalyst showed an excellent toluene oxidation activity with 90% toluene conversion temperature (T(90)) of 197 degrees C at a weight hourly space velocity of 40,000 mL g(-1) h(-1) as compared to undoped CeO(2) (T(90) = 225 degrees C) and Ce based oxides in previous reports. In addition, the Mn(0.15)Ce(0.85)O(2) catalyst displayed strong recyclability, water resistant ability and long-time stability. The in situ DRIFT results showed that the Mn(0.15)Ce(0.85)O(2) catalyst has a robust oxidation capability as toluene is quickly adsorbed and actuated as compared to CeO(2). Thus, the present work lays the foundation for designing a highly active catalyst for toluene elimination from the environment" |
| Keywords: | Temperature *Oxygen *Oxides Oxidation-Reduction Catalysis Toluene Catalytic oxidation Engineering Mn(x)Ce(1-x)O(2) catalyst Oxidation mechanism Oxygen vacancy defect; |
| Notes: | "MedlineIsmail, Ahmed Zahid, Muhammad Ali, Sharafat Bakhtiar, Syed Ul Hasnain Ali, Nauman Khan, Adnan Zhu, Yujun eng Netherlands 2023/03/17 Environ Res. 2023 Jun 1; 226:115680. doi: 10.1016/j.envres.2023.115680. Epub 2023 Mar 14" |
