State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences , Taiyuan, Shanxi 030001, P. R. China.
University of the Chinese Academy of Sciences , Beijing 100039, P. R. China.
J Am Chem Soc. 2016 Aug 3;138(30):9361-4. doi: 10.1021/jacs.6b04175. Epub 2016 Jul 21.
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.
使用碳化硅负载的金纳米粒子作为光催化剂，实现了肉桂醛到肉桂醇的高选择性 2-丙醇加氢。在 20°C 可见光照射下，加氢反应达到了高达 487 h-1 的转化率和 100%的醇选择性。这种高性能归因于 Au NPs 的局域表面等离激元共振和 SiC/Au 界面间电荷转移的协同效应。带电金属表面有利于 2-丙醇氧化生成丙酮，而界面处的电子和空间位阻效应有利于α,β-不饱和醛的末端优先吸附，从而实现其选择性转化为不饱和醇。我们表明，这种 Au/SiC 光催化剂能够将各种α,β-不饱和醛高效、高选择性地加氢转化为相应的不饱和醇。
