High dimensionally structured W-V oxides as highly effective catalysts for selective oxidation of toluene
[Display omitted] •High dimensionally structured W-V oxide (HDS-WVO) was synthesized by hydrothermal method.•Local catalyst structure in HDS-WVO was analyzed in atomic level by HAADF-STEM analysis.•HDS-WVO showed outstanding catalytic performance for selective oxidation of toluene. High dimensionall...
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| Published in: | Catalysis today Vol. 363; pp. 60 - 66 |
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| Main Authors: | , , , , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier B.V
01-03-2021
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | [Display omitted]
•High dimensionally structured W-V oxide (HDS-WVO) was synthesized by hydrothermal method.•Local catalyst structure in HDS-WVO was analyzed in atomic level by HAADF-STEM analysis.•HDS-WVO showed outstanding catalytic performance for selective oxidation of toluene.
High dimensionally structured W-V-O catalysts (HDS-WVO) were synthesized by hydrothermal method and catalyst structures were investigated by HAADF-STEM analysis. HDS-WVO were rod-shaped crystals and the cross-sections were constituted by W6O21 pentagonal units and MO6 octahedra (M = V, W), forming heptagonal and hexagonal channels. HDS-WVO catalysts showed excellent catalytic performance for selective oxidation of toluene to benzoic acid, and the activity and the selectivity to benzoic acid were superior to those of state-of-the-art catalysts. After the ion exchange using Cs+, the catalytic activity over HDS-WVO was significantly decreased. Since HAADF-STEM analysis and N2 adsorption revealed that Cs+ was located mainly at the heptagonal channel of HDS-WVO, it can be concluded that toluene oxidation takes place at the heptagonal channel site of HDS-WVO. |
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| ISSN: | 0920-5861 1873-4308 |
| DOI: | 10.1016/j.cattod.2019.08.023 |