Journal
CHEMISTRYSELECT
Volume 8, Issue 27, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.202301823
Keywords
bio-based feedstock; cellobiose valorization; electrocatalysis; electrochemical hydrogenation; organic electrosynthesis
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This study elucidates key parameters allowing the electrochemical valorization of cellobiose, by creating value-added products by both, anodic oxidation, and cathodic reduction. The first electrochemical reduction of cellobiose to cellobitol was achieved in a divided cell using Pb as cathode, with a conversion rate of up to 49% but with long reaction times (over 26 h) and low coulombic efficiency (4%). The successful synthesis of cellobionic acid was demonstrated by mediated oxidation in an undivided electrochemical cell, with cellobiose oxidation highly selective, achieving up to 92% conversion at 48% coulombic efficiency when using a charge of 2 FE.
This study elucidates key parameters allowing the electrochemical valorization of cellobiose, by creating value-added products by both, anodic oxidation, and cathodic reduction. We demonstrate the first electrochemical reduction of cellobiose to cellobitol in a divided cell using Pb as cathode, leading up to 49 % conversion, though with long reaction times (over 26 h) and low coulombic efficiency ( CE ${CE}$ ) of 4 %. The successful synthesis of cellobionic acid was demonstrated by mediated oxidation in an undivided electrochemical cell, using a graphite anode and CaBr2 as electrocatalytic mediator. Cellobiose oxidation was highly selective, allowing for up to 92 % conversion to cellobionic acid at 48 % CE ${CE}$ when using a charge of 2 FE.
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