Mechanism of glucose electrochemical oxidation on gold surface

Mauro Pasta, Fabio La Mantia, Yi Cui

Research output: Contribution to journalArticlepeer-review

193 Scopus citations

Abstract

The complex oxidation of glucose at the surface of gold electrodes was studied in detail in different conditions of pH, buffer and halide concentration. As observed in previous studies, an oxidative current peak occurs during the cathodic sweep showing a highly linear dependence on glucose concentration, when other electrolyte conditions are unchanged. The effect of the different conditions on the intensity of this peak has stressed the limitations of the previously proposed mechanisms. A mechanism able to explain the presence of this oxidative peak was proposed. The mechanism takes into account ion-sorption and electrochemical adsorption of OH-, buffer species (K2HPO4/KH2PO4) and halides. © 2010 Elsevier Ltd. All rights reserved.
Original languageEnglish (US)
Pages (from-to)5561-5568
Number of pages8
JournalElectrochimica Acta
Volume55
Issue number20
DOIs
StatePublished - Aug 2010
Externally publishedYes

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