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.
|Titolo:||Mechanism of glucose electrochemical oxidation on gold surface|
PASTA, MAURO (Primo)
|Parole Chiave:||Electrochemical impedance spectroscopy; Glucose electrochemical oxidation; Glucose sensing; Gold electrochemical oxidation; Reaction mechanism|
|Settore Scientifico Disciplinare:||Settore CHIM/02 - Chimica Fisica|
|Data di pubblicazione:||ago-2010|
|Digital Object Identifier (DOI):||10.1016/j.electacta.2010.04.069|
|Appare nelle tipologie:||01 - Articolo su periodico|