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Roles of Oxygen Vacancies in the Bulk and Surface of CeO2 for Toluene Catalytic Combustion
Abstract
Catalytic combustion technology is one of the effective methods to remove VOCs such as toluene from industrial emissions. The decomposition of an aromatic ring via catalyst oxygen vacancies is usually the rate-determining step of toluene oxidation into CO 2 . Series of CeO 2 probe models were synthesized with different ratios of surface-to-bulk oxygen vacancies. Besides the devotion of the surface vacancies, a part of the bulk vacancies promotes the redox property of CeO 2 in toluene catalytic combustion: surface vacancies tend to adsorb and activate gaseous O 2 to form adsorbed oxygen species, whereas bulk vacancies improve the mobility and activity of lattice oxygen species via their transmission effect. Adsorbed oxygen mainly participates in the chemical adsorption and partial oxidation of toluene (mostly to phenolate). With the elevated temperatures, lattice oxygen of the catalysts facilitates the decomposition of aromatic rings and further improves the oxidation of toluene to CO 2 .
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Cites
Ru/CeO2 Catalyst with Optimized CeO2 Support Morphology and Surface Facets for Propane Combustion
Wang, Z., Huang, Z., Brosnahan, J. T., Zhang, S., Guo, Y., Guo, Y., Wang, L., Wang, Y., & Zhan, W. (2019) · Environmental Science & Technology · doi:10.1021/acs.est.9b01929 · Cited by 377
Cited by
Sun, H., Wang, H., & Qu, Z. (2023) · ACS Catalysis · doi:10.1021/acscatal.2c05168 · Cited by 298
Metadata
- Authors
- Su, Z., Yang, W., Wang, C., Xiong, S., Cao, X., Peng, Y., Si, W., Weng, Y., Xue, M., & Li, J.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2020-08-25
- Volume
- 54
- Issue
- 19
- Pages
- 12684-12692
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W3081322132
- Cited by
- 476
- References
- 1
- FWCI
- 19.02
- Type
- journal article
- Language
- en
- Open access
- closed
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- Su, Z., Yang, W., Wang, C., Xiong, S., Cao, X., Peng, Y., Si, W., Weng, Y., Xue, M., & Li, J. (2020). Roles of Oxygen Vacancies in the Bulk and Surface of CeO2 for Toluene Catalytic Combustion. Environmental Science & Technology. https://doi.org/10.1021/acs.est.0c03981
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