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Direct Oxidation of Glucose to Glucaric Acid Using Bimetallic AuPt/ZrO2 Nanocatalysts
Joanna Elzbieta Olszowka1, Abdul Selim1, Žan Lavrič2,3
1Department of Nanocatalysis, J. Heyrovský Institute of Physical Chemistry of the CAS, Dolejškova 2155/3, 182 23 Prague, Czech Republic.
Abstract:
Transforming biobased resources, such as glucose, into value-added chemicals is a crucial step in utilizing biomass. Herein, we report on the one-pot conversion of glucose to glucaric acid, by selectively steering the oxidation of glucose from the typical production of gluconic acid toward the production of glucaric acid, using monometallic Au and Pt and bimetallic AuPt nanocatalysts supported on zirconia. While the monometallic catalysts promote the production of gluconic acid, bimetallic catalysts favor the direct formation of glucaric acid from glucose, with efficacy depending on the Au/Pt ratio, reaching up to 44% selectivity with the Au67%Pt33%@ZrO2 catalyst. Theoretical calculations confirm the formation of alloys, as experimentally evidenced by EDX-mapping and HR-TEM imaging.
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