e-Journal
Paper Type ![]() |
Contributed Paper |
Title ![]() |
Catalytic Oxidation of Glucose with Hydrogen Peroxide and Colloidal Gold as Pseudo-Homogenous Catalyst: A Combined Experimental and Theoretical Investigation |
Author ![]() |
Jitrayut Jitonnom [a] and Christoph Sontag *[a] |
Email ![]() |
c.sontag@web.de |
Abstract: Gold nanoparticles have been proved to act as oxidation catalyst for glucose oxidation, offering a “chemical” synthetic route to gluconic acid and gluconates - nowadays commercially produced by an enzyme catalyzed oxidation. Our investigations of the gold catalyzed oxidation route showed that gold nanoparticles produced by a modified Turkevich method have a high activity for this pseudo-homogenous catalytic reaction. Under mild reaction conditions, glucose could be oxidized in good yields (~70%) and the resulting gluconate could be isolated by column chromatography and precipitation as calcium salt. The catalytic oxidation reaction was found to follow the first-order kinetic with a rate constant of 4.95 h-1, in good agreement with previous finding. The underlying reaction mechanism is discussed, assuming that the formation of a gold-glucose cluster intermediate is a key catalytic step. Several structures of the gold-glucose intermediates were examined using density functional theory methods. The molecular behavior of glucose adsorption in gold colloid solution is present.
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Start & End Page ![]() |
825 - 833 |
Received Date ![]() |
2013-07-10 |
Revised Date ![]() |
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Accepted Date ![]() |
2014-04-25 |
Full Text ![]() |
Download |
Keyword ![]() |
colloidal gold catalyst, glucose oxidation, gold nanoparticle, gluconic acid, DFT |
Volume ![]() |
Vol.43 No.4 (JULY 2016) |
DOI |
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Citation |
[a] J.J. and *[a] C.S., Catalytic Oxidation of Glucose with Hydrogen Peroxide and Colloidal Gold as Pseudo-Homogenous Catalyst: A Combined Experimental and Theoretical Investigation, Chiang Mai Journal of Science, 2016; 43(4): 825-833. |
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