Microwave-assisted base-free oxidation of glucose on gold nanoparticle catalysts

Base-free oxidation of glucose to gluconic acid with supported gold catalysts was studied using microwave heating. High conversion and selectivity were obtained in a remarkably shortened reaction time; in 10min gluconic acid was obtained with up to 76% yields with 0.09mol% Au/Al2O3 and hydrogen pero...

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Bibliographic Details
Published in:Catalysis communications 2016-01, Vol.74, p.115-118
Main Authors: Rautiainen, Sari, Lehtinen, Petra, Vehkamäki, Marko, Niemelä, Klaus, Kemell, Marianna, Heikkilä, Mikko, Repo, Timo
Format: Article
Language:English
Subjects:
Carbohydrates
Gold
Heterogeneous catalysis
Microwave chemistry
Oxidation
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Summary:Base-free oxidation of glucose to gluconic acid with supported gold catalysts was studied using microwave heating. High conversion and selectivity were obtained in a remarkably shortened reaction time; in 10min gluconic acid was obtained with up to 76% yields with 0.09mol% Au/Al2O3 and hydrogen peroxide as oxidant. Very high turn-over frequencies over 10,000h−1 were measured for the microwave assisted oxidation. Moreover, the catalyst activity remained constant in four consecutive runs, even though minor particle growth was observed. [Display omitted] •Base-free glucose oxidation with gold catalysts was promoted by microwave heating.•76% gluconic acid in 10min with hydrogen peroxide as oxidant•Very high turn-over frequencies over 10,000h−1•Activity of Au/Al2O3 catalyst remained unchanged during four consecutive runs
ISSN:1566-7367
1873-3905
DOI:10.1016/j.catcom.2015.11.014