Solvent-free oxidation of primary alcohols to aldehydes using Au-Pd/TiO2 catalysts

被引:1941
作者
Enache, DI
Edwards, JK
Landon, P
Solsona-Espriu, B
Carley, AF
Herzing, AA
Watanabe, M
Kiely, CJ
Knight, DW
Hutchings, GJ
机构
[1] Cardiff Univ, Sch Chem, Cardiff CF10 3AT, Wales
[2] Lehigh Univ, Ctr Adv Mat & Nanotechnol, Bethlehem, PA 18015 USA
基金
英国工程与自然科学研究理事会;
关键词
D O I
10.1126/science.1120560
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The oxidation of alcohols to aldehydes with O-2 in place of stoichiometric oxygen donors is a crucial process for the synthesis of fine chemicals. However, the catalysts that have been identified so far are relatively inactive with primary alkyl alcohols. We showed that Au/Pd-TiO2 catalysts give very high turnover frequencies (up to 270,000 turnovers per hour) for the oxidation of alcohols, including primary alkyl alcohols. The addition of Au to Pd nanocrystals improved the overall selectivity and, using scanning transmission electron microscopy combined with x-ray photoelectron spectroscopy, we showed that the Au-Pd nanocrystals were made up of a Au-rich core with a Pd-rich shell, indicating that the Au electronically influences the catalytic properties of Pd.
引用
收藏
页码:362 / 365
页数:4
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