Synthesis and Characterization of Nitrogen-Doped Carbon Nanospheres Decorated with Au Nanoparticles for the Liquid-Phase Oxidation of Glycerol

Carbon and nitrogen-doped carbon nanospheres (CNS) were prepared by thermal pyrolysis of benzene (CNSB), aniline (CNSAN), and nitrobenzene (CNSNB) and used as supports for gold nanoparticles. Gold-based catalysts were prepared by the gold-sol method. The catalysts were checked in liquid-phase glycer...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2014-10, Vol.53 (43), p.16696-16706
Main Authors: Gil, Sonia, Lucas, Pedro Joaquín, Nieto-Márquez, Antonio, Sánchez-Silva, Luz, Giroir-Fendler, Anne, Romero, Amaya, Valverde, José Luís
Format: Article
Language:English
Subjects:
Aniline
Carbon
Catalysis
Catalysts
Chemical Sciences
Environment and Society
Environmental Sciences
Glycerols
Gold
Nanoparticles
Nanospheres
Oxidation
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Summary:Carbon and nitrogen-doped carbon nanospheres (CNS) were prepared by thermal pyrolysis of benzene (CNSB), aniline (CNSAN), and nitrobenzene (CNSNB) and used as supports for gold nanoparticles. Gold-based catalysts were prepared by the gold-sol method. The catalysts were checked in liquid-phase glycerol oxidation. The nature of the N-containing groups influenced both the acid–base properties of the supports and the Au particle deposition. As a consequence, an enhanced metal sintering by enriching the surface electron density of the support, essentially in the quaternary form, was observed. Both the glycerol conversion and glyceric acid selectivity increased with decreasing gold particle size. Moreover, catalyst Au/CNSB promoted the formation of glyceric acid, whereas Au/CNSAN and Au/CNSNB catalysts favored the oxidation of the secondary hydroxyl group of glycerol. Results clearly confirmed the influence of the support properties on the catalytic performance of gold in selective glycerol oxidation.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie502873x