Visible-Light-Driven Selective Photocatalytic Hydrogenation of Cinnamaldehyde over Au/SiC Catalysts
| Autor: | Cai Hong Hao, Xiang-Yun Guo, Shuai Chen, Hong Yang, Yung Tin Pan, Zhi Feng Jiao, Xiao Ning Guo |
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| Rok vydání: | 2016 |
| Předmět: |
Cinnamyl alcohol
Nanoparticle 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Biochemistry Catalysis Cinnamaldehyde 0104 chemical sciences chemistry.chemical_compound Colloid and Surface Chemistry chemistry Photocatalysis Surface plasmon resonance 0210 nano-technology Selectivity Visible spectrum |
| Zdroj: | Journal of the American Chemical Society. 138:9361-9364 |
| ISSN: | 1520-5126 0002-7863 |
| Popis: | Highly selective hydrogenation of cinnamaldehyde to cinnamyl alcohol with 2-propanol was achieved using SiC-supported Au nanoparticles as photocatalyst. The hydrogenation reached a turnover frequency as high as 487 h(-1) with 100% selectivity for the production of alcohol under visible light irradiation at 20 °C. This high performance is attributed to a synergistic effect of localized surface plasmon resonance of Au NPs and charge transfer across the SiC/Au interface. The charged metal surface facilitates the oxidation of 2-propanol to form acetone, while the electron and steric effects at the interface favor the preferred end-adsorption of α,β-unsaturated aldehydes for their selective conversion to unsaturated alcohols. We show that this Au/SiC photocatalyst is capable of hydrogenating a large variety of α,β-unsaturated aldehydes to their corresponding unsaturated alcohols with high conversion and selectivity. |
| Databáze: | OpenAIRE |
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