ELECTROOXIDATION MECHANISM OF GLYOXYLIC-ACID ON AU POLYCRYSTALLINE ELECTRODES IN ACIDIC MEDIUM

Authors
OCON P VELASCO JG
Citation
P. Ocon et Jg. Velasco, ELECTROOXIDATION MECHANISM OF GLYOXYLIC-ACID ON AU POLYCRYSTALLINE ELECTRODES IN ACIDIC MEDIUM, Berichte der Bunsengesellschaft fur Physikalische Chemie, 102(8), 1998, pp. 1039-1044
Citations number
23
Categorie Soggetti
Chemistry Physical
Journal title
Berichte der Bunsengesellschaft fur Physikalische Chemie
ISSN journal
00059021 → ACNP
Volume
102
Issue
8
Year of publication
1998
Pages
1039 - 1044
Database
ISI
SICI code
0005-9021(1998)102:8<1039:EMOGOA>2.0.ZU;2-O
Abstract
The electrooxidation mechanism of glyoxylic acid has been investigated on an Au polycrystalline electrode in acidic medium. The kinetic para meters deduced: Tafel slope, reaction order with respect to glyoxylic acid concentration, reaction order with respect to the pH, apparent ac tivation enthalpy, entropy and Gibbs energy, and the final products de tected after oxidation are in agreement with an electrooxidation mecha nism beginning with an adsorption and a rate determining step in which the adsorbate becomes oxidized in a monoelectronic transfer reaction.