Elucidating the Reaction Pathway of Glucose Electrooxidation to Its Valuable Products: The Influence of Mass Transport and Electrode Potential on the Product Distribution
Research output: Contribution to journal › Journal article › Research › peer-review
Converting glucose electrochemically to its valuable derivatives, gluconic and glucaric acids, is a promising process for the utilization of renewable carbon sources. Understanding the reaction pathway to form glucaric acid from glucose is key to performing the process efficiently. In this study, we investigate the influence of mass transport as well as electrode potential on the product distribution in glucose, gluconic acid, and glucuronic acid oxidation on a gold disk in an RDE setup. We find glucose and glucuronic acid to be easily oxidized, while the oxidation of gluconic acid is kinetically limited. Combining DFT calculations and the experimental results, we show that on gold, the oxidation of aldehyde groups proceeds readily, while the oxidation of hydroxyl groups is challenging and occurs indiscriminately on C atoms in glucose and its derivatives. Additionally, the DFT calculations present a reaction pathway that can explain the absence of glucuronic acid in the conducted experiments.
Original language | English |
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Journal | Journal of Physical Chemistry C |
Volume | 127 |
Issue number | 37 |
Pages (from-to) | 18609-18618 |
Number of pages | 10 |
ISSN | 1932-7447 |
DOIs | |
Publication status | Published - 2023 |
Bibliographical note
Funding Information:
We acknowledge support from the Swiss National Science Foundation (SNSF) project No. 200021_184742 and the Danish National Research Foundation Center for High Entropy Alloy Catalysis (DNRF 149). A.B. acknowledges support from the Carlsberg Foundation (CF21-0144).
Publisher Copyright:
© 2023 American Chemical Society.
ID: 373874138