High dimensionally structured W-V oxides as highly effective catalysts for selective oxidation of toluene
| Autor: | Wataru Ueda, Norihito Hiyoshi, Ken-ichi Shimizu, Yoshinori Goto, Zhenxin Zhang, Toru Murayama, Takashi Toyao, Shutoku Lee, Satoshi Ishikawa |
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| Rok vydání: | 2021 |
| Předmět: |
Ion exchange
Inorganic chemistry 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Toluene Catalysis Toluene oxidation 0104 chemical sciences chemistry.chemical_compound Adsorption Octahedron chemistry 0210 nano-technology Selectivity Benzoic acid |
| Zdroj: | Catalysis Today. 363:60-66 |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2019.08.023 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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