1. Catalytic Degradation of Toluene over MnO 2 /LaMnO 3 : Effect of Phase Type of MnO 2 on Activity.
- Author
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Li, Lu, Liu, Yuwei, Liu, Jingyin, Zhou, Bing, Guo, Mingming, and Liu, Lizhong
- Subjects
TOLUENE ,CATALYTIC oxidation ,SURFACE area ,PEROVSKITE - Abstract
Series of α, β, γ, δ type MnO
2 supported on LaMnO3 perovskite was developed by a one-pot synthesis route. Compared with α-MnO2 , β-MnO2 , γ-MnO2 , δ-MnO2 and LaMnO3 oxides, all MnO2 /LaMnO3 showed promotional catalytic performance for toluene degradation. Among them, α-MnO2 /LaMnO3 holds the best active and mineralization efficiency. By the analysis of N2 adsorption-desorption, XPS and H2 -TPR, it can be inferred that the improved activity should be ascribed to the higher proportion of lattice oxygen, better low-temperature reducibility and larger specific surface area. Besides, the byproducts from the low-temperature reaction of toluene oxidation were detected by a TD/GC-MS, confirming the presence of the intermediates. Combined with the in-situ DRIFTS, the catalytic degradation path of toluene oxidation has also been discussed in depth. [ABSTRACT FROM AUTHOR]- Published
- 2022
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