肉桂醇
肉桂醛
催化作用
醛
化学
酒
纳米团簇
选择性
水滑石
基质(水族馆)
有机化学
化学选择性
海洋学
地质学
作者
Yuan Tan,Xiaoyan Liu,Leilei Zhang,Fei Liu,Aiqin Wang,Tao Zhang
出处
期刊:Chinese Journal of Catalysis
[China Science Publishing & Media Ltd.]
日期:2021-03-01
卷期号:42 (3): 470-481
被引量:23
标识
DOI:10.1016/s1872-2067(20)63678-6
摘要
Chemoselective hydrogenation of unsaturated aldehyde to unsaturated alcohol has attracted growing interests in recent years due to its widespread applications in fine chemicals. However, the hydrogenation of the C=O bond was thermodynamically and kinetically unfavorable over the hydrogenation of the C=C bond. Thus, to obtain the unsaturated alcohol from the unsaturated aldehyde is very difficult in most of the catalytic systems. In this work, ZnAl-hydrotalcite-supported cysteine-capped Au25 nanoclusters were used as the precatalysts for chemoselective hydrogenation of cinnamaldehyde to cinnamyl alcohol. The catalyst showed stable high selectivity (~ 95%) at prolonged reaction time and complete conversion of the substrate. According to the results of the control experiments, the in-situ DRIFTS of the substrate under high pressure of hydrogen and the 27Al MAS-NMR spectroscopy, we proposed that the difference of the preferential adsorption of the C=O bond to that of the C=C bond was derived from the nature of the support of the gold catalysts.
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