Alkoxylation of α, β-unsaturated aldehydes on gold supported on mesoporous anatase
| Autor: | Hideaki Yoshitake, Shota Kenjo |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Anatase
Materials science 010405 organic chemistry Inorganic chemistry Methacrolein General Chemistry 010402 general chemistry Condensed Matter Physics 01 natural sciences 0104 chemical sciences Catalysis law.invention chemistry.chemical_compound chemistry Mechanics of Materials law General Materials Science Calcination Crystallite Particle size Crotonaldehyde Mesoporous material |
| Zdroj: | Microporous and Mesoporous Materials. 237:12-22 |
| ISSN: | 1387-1811 |
| DOI: | 10.1016/j.micromeso.2016.09.010 |
| Popis: | Mesoporous anatase prepared by calcination of mesoporous amorphous titania from 673 to 923 K was used as supports for gold catalysts for the alkoxylation of α, β-unsaturated aldehydes. The size of anatase crystallites increases with calcination temperature, resulting in enlargement of mesopores. We show a clear positive correlation between the average size of gold particles on the catalyst, prepared by deposition-precipitation method on these mesoporous anatases, with the size of the mesopores. Although the particle size distributions are wide when the average is large, this simple method can be used to roughly control of the particle size of metal catalysts. Alkoxylation of α, β-unsaturated aldehydes was carried out by the conversion of acrolein, methacrolein and crotonaldehyde in methanol. The variations in selectivity and activity are explained mainly on the basis of the size of the crystallites on the support oxide. |
| Databáze: | OpenAIRE |
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