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Synfacts 2017; 13(03): 0319
DOI: 10.1055/s-0036-1589979
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart · New York

Hydrogenations with Hydrotalcite-Supported Gold–Ceria Nanocomposites

Rezensent(en):
Yasuhiro Uozumi
,
Go Hamasaka
Urayama T. Mitsudome T. Maeno Z. Mizugaki T. Jitsukawa K. Kaneda K. * Osaka University, Japan
Green, Multi-Gram One-Step Synthesis of Core–Shell Nanocomposites in Water and Their Catalytic Application to Chemoselective Hydrogenations.

Chem. Eur. J. 2016;
22: 17962-17966
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Publikationsverlauf

Publikationsdatum:
15. Februar 2017 (online)

 
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Key words

gold - cerium oxide - hydrotalcite - hydrogenation - heterogeneous catalysis

Significance

Cerium oxide coated gold nanoparticles supported on hydrotalcite (Au@CeO/HT) were prepared by mixing HAuCl4·nH2O, Ce(NO3)3, and hydrotalcite in water (eq. 1). Au@CeO/HT catalyzed the hydrogenation of aldehydes or alkynes under hydrogen to give the corresponding alcohols and alkenes, respectively (eqs. 2 and 3). Au@CeO/HT also promoted the deoxygenation of epoxides to afford the corresponding alkenes (eq. 4).


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Comment

Au@CeO/HT were characterized by means of TEM, HAADF-STEM, and EDX analyses. In the hydrogenation of citral, the catalyst was recovered by simple filtration and reused without loss of its catalytic activity (reuse: >99% yield). ICP-AES analysis showed no leaching of gold from the catalyst during the reaction. TEM analysis of the recovered catalyst revealed that the structure of the catalyst was unchanged after the reaction.


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