The electro-oxidation of glucose on microcolumnar gold electrodes in different neutral solutions
1992; Elsevier BV; Volume: 323; Issue: 1-2 Linguagem: Inglês
10.1016/0022-0728(92)80008-r
ISSN1873-2569
AutoresA.M. Castro Luna, M. Fernández Lorenzo de Mele, A.J. Arvía,
Tópico(s)Analytical Chemistry and Sensors
ResumoThe influence of the electrolyte composition on the kinetics and mechanism of glucose electro-oxidation has been investigated on microcolumnar Au electrodes. Neutral electrolyte solutions containing either sulphate, phosphate, borate or perchlorate anions were employed. The results show that the glucose electro-oxidation reaction on this type of Au electrode is favoured in those electrolytes with a high buffer capacity and is inhibited by anion adsorption. The electro-oxidation process involves the formation of weakly and strongly bound adsorbates acting as poisons. Bulk glucose electro-oxidation apparently takes place without the formation of a detectable amount of adsorbed intermediates.
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