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Chiang Mai Journal of Science, Faculty of Science, Chiang Mai University
 


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Catalytic Oxidation of Glucose with Hydrogen Peroxide and Colloidal Gold as Pseudo-Homogenous Catalyst: A Combined Experimental and Theoretical Investigation


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. 
Start & End Page 
825 - 833
Received Date 
2013-07-10
Revised Date 
Accepted Date 
2014-04-25
Full Text 
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Keyword 
colloidal gold catalyst, glucose oxidation, gold nanoparticle, gluconic acid, DFT
Volume 
Vol.43 No.4 (JULY 2016)
DOI 
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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