ChuWei1965分享 http://blog.sciencenet.cn/u/ChuWei1965 1991 PhD degree in France; Prof. in Sichuan Univ.

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Enache Hutchings etal Science 311-362-2006

已有 3412 次阅读 2009-8-7 17:09 |个人分类:推荐专业论文 能源催化和环境等|系统分类:科研笔记|关键词:Oxidation,,catalyst,,Au-Pd-TiO2,| Oxidation, catalyst, Au-Pd-TiO2

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   Solvent-Free Oxidation of Primary Alcohols to Aldehydes Using Au-Pd/ TiO2 Catalysts

  Enache Hutchings et al. Science 311-362-2006

   Abstract:  The oxidation of alcohols to aldehydes with O2 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. 

 



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