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Synfacts 2014; 10(3): 0331
DOI: 10.1055/s-0033-1340727
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart · New York

The Crystal Plane Effect in the Au/CeO2-Catalyzed Alcohol Oxidation

Contributor(s):
Yasuhiro Uozumi
,
Yoichi M. A. Yamada
,
Takuma Sato
Wang M, Wang F, * Ma J, Li M, Zhang Z, Wang Y, Zhang X, Xu J. * Dalian Institute of Chemical Physics, P. R. of China
Investigations on the Crystal Plane Effect of Ceria on Gold Catalysis in the Oxidative Dehydrogenation of Alcohols and Amines in the Liquid Phase.

Chem. Commun. 2014;
50: 292-294
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Publication History

Publication Date:
17 February 2014 (online)

 
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Key words

ceria - gold - crystal plane - oxidation - alcohols

Significance

The oxidation of primary and secondary alcohols proceeds in the presence of Au/CeO2-R (CeO2-R = CeO2-nanorod; 0.1 mol% Au), O2 and Cs2CO3 to give aldehydes and ketones with up to quantitative conversion. The oxidation of primary amines (RCH2NH2), affording dimerized imines RCH2N=CHR, was also investigated under O2-oxidative conditions.


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Comment

The catalytic ability of gold nanoparticles supported on ceria{100}, {110}, and {111} crystal planes was examined for the oxidation of alcohols. Thus, the aerobic oxidation of benzyl alcohol was carried out with Au/CeO2-R (nanorod), Au/CeO2-C (nanocube), Au-CeO2-O (nano-octahedra), or Au/CeO2-P (nanoparticle) to give benzaldehyde with 96%, 5%, 42%, and 79% conversion. The exposed crystal planes of ceria were as follows: CeO2-R: {110} and {100}, CeO2-C: {100}, CeO2-O: {111}.


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