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Chen Y, Zeng Z, Liu D, Zhang J, Guo Y, Zou J, Guan J, Xu X, Li L. Insights into non-crystalline structure of solid solution Ce-Mn co-oxide nanofibers for efficient low-temperature toluene oxidation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:99830-99841. [PMID: 37615912 DOI: 10.1007/s11356-023-29299-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 08/08/2023] [Indexed: 08/25/2023]
Abstract
The controllable preparation of efficient non-crystalline solid solution catalysts is a great challenge in the catalytic oxidation of volatile organic compounds. In this work, series non-crystalline solid solution structured Ce-Mn co-oxide nanofibers were creatively prepared by adjusting Ce/Mn molar ratios using electrospinning. 0.20CeMnOx (the ratio of Ce to Mn was 0.2) displayed an outstanding low-temperature toluene oxidation activity (T90 = 233 °C). The formation of the amorphous solid solution and the unique nanofiber structure both contributed to a large specific surface area (S = 173 m2 g-1) and high adsorbed oxygen content (Oads/O = 41.3%), which enhanced the number of active oxygen vacancies. The synergies between non-crystalline structure and active oxygen species markedly improved oxygen migration rate as well as redox ability of the catalysts. Additionally, in situ diffuse reflectance infrared Fourier transform spectra showed that the absorbed toluene could be completely oxidized to CO2 and H2O with benzyl alcohol, benzaldehyde, benzoic acid, and maleic anhydride as intermediates. In summary, this study provided an alternative route for the synthesis of non-crystalline metal co-oxide nanofibers.
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Affiliation(s)
- Yanzhu Chen
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, China
| | - Zheng Zeng
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, China
| | - Dongyang Liu
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, China
| | - Jing Zhang
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, China
| | - Yang Guo
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, China
| | - Jianwu Zou
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, China
| | - Juan Guan
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, China
| | - Xiang Xu
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, China
| | - Liqing Li
- School of Energy Science and Engineering, Central South University, Changsha, 410083, Hunan, China.
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Buzanov GA, Nipan GD. Phase Equilibria in the Eu–Mn–O System. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622070051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zagaynov IV, Shelepin IV, Naumkin AV, Konovalov AA. Impact of iso/aliovalent dopants in ceria solid solutions for improved CO oxidation. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2021.112016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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