AUTHOR=Ginoux Erwann , Rafaïdeen Thibault , Cognet Patrick , Latapie Laure , Coutanceau Christophe 

TITLE=Selective glucose electro-oxidation catalyzed by TEMPO on graphite felt

JOURNAL=Frontiers in Chemistry

VOLUME=Volume 12 - 2024

YEAR=2024

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2024.1393860

DOI=10.3389/fchem.2024.1393860

ISSN=2296-2646

ABSTRACT=Long term electrolyses of glucose in potassium carbonate (K2CO3) aqueous electrolyte have been performed on graphite felt electrodes with TEMPO as a homogeneous catalyst. The influence of operating conditions (initial concentrations of glucose, TEMPO and K2CO3, and applied anode potential) on the conversion, selectivity towards gluconate/glucarate and faradaic efficiency were first assessed. From these previous results, the optimization of conversion, selectivity and faradaic efficiency has been performed using a design of experiments based on the L9(3 4 ) table of Taguchi. This optimization allowed reaching a selectivity into gluconate of 84 % with a 71% faradaic efficiency for a glucose conversion as high as 79 %. Side products such as glucaric acid were also obtained for applied potential higher than 1.5 V vs. RHE.