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Promotional Effect of Zirconium Doping on the NH
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‐SCR Activity of CeO
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and CeO
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‐TA Modified by Thiourea: A Comparative Study. ChemCatChem 2023. [DOI: 10.1002/cctc.202201578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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Jiang J, Zhu Z, He Y, Sarkodie B, Wang W, Jiang H, Hu Y, Li C. Close-Contact Oxygen Vacancies Synthesized by FSP Promote the Supplement of Active Oxygen Species To Improve the Catalytic Combustion Performance of Toluene. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1093-1102. [PMID: 36630661 DOI: 10.1021/acs.langmuir.2c02836] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Catalytic combustion is an important means to reduce toluene pollution, and improving the performance of catalytic combustion catalysts is of great significance for practical applications. The study of oxygen vacancies is one of the key steps to improve catalyst performance. Here, two different oxygen vacancy structures were well-defined and controllably synthesized by flame spray pyrolysis (FSP) to evaluate their effect on the catalytic combustion performance of toluene. The closely contacted oxygen vacancies (c-Vo) enhance the oxygen activation capacity of the catalyst, and the temperature of the first oxygen desorption peak and hydrogen reduction peak is 56 and 37 °C lower than the separated oxygen vacancy (s-Vo) sample, respectively. The oxygen activation energy barrier on the c-Vo is calculated to be negligible of only 0.04 eV. Both in situ DRIFT and DFT calculations indicate that the c-Vo structure accelerates the catalytic oxidation of p-toluene molecules. Moreover, due to the unique characteristics of high-temperature synthesis and rapid quenching, FSP brings excellent water resistance and high-temperature stability to the catalyst. In conclusion, utilizing the FSP in situ reduction strategy can create more c-Vo to improve the catalytic combustion performance of toluene.
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Affiliation(s)
- Jiechao Jiang
- Shanghai Environmental Friendly Materials Technical Service Platform, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai200237, China
| | - Zhengju Zhu
- Shanghai Environmental Friendly Materials Technical Service Platform, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai200237, China
| | - Ying He
- Shanghai Environmental Friendly Materials Technical Service Platform, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai200237, China
| | - Bismark Sarkodie
- Shanghai Environmental Friendly Materials Technical Service Platform, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai200237, China
| | - Wenyi Wang
- Shanghai Environmental Friendly Materials Technical Service Platform, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai200237, China
| | - Hao Jiang
- Shanghai Environmental Friendly Materials Technical Service Platform, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai200237, China
| | - Yanjie Hu
- Shanghai Environmental Friendly Materials Technical Service Platform, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai200237, China
| | - Chunzhong Li
- Shanghai Environmental Friendly Materials Technical Service Platform, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai200237, China
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