Electrochemical behaviour of benzoic acid on platinum and gold electrodes

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/15299
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Title: Electrochemical behaviour of benzoic acid on platinum and gold electrodes
Authors: Montilla, Francisco | Morallon, Emilia | Vázquez Picó, José Luis
Research Group/s: Electrocatálisis y Electroquímica de Polímeros
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Benzoic acid | Spectroelectrochemistry | Platinum electrode | Gold electrode
Knowledge Area: Química Física
Issue Date: 29-Oct-2003
Publisher: American Chemical Society
Citation: MONTILLA JIMÉNEZ, Francisco; MORALLÓN NÚÑEZ, Emilia; VÁZQUEZ PICÓ, José Luis. “Electrochemical behaviour of benzoic acid on platinum and gold electrodes”. Langmuir. Vol. 19, No. 24 (2003). ISSN 0743-7463, pp. 10241-10246
Abstract: A voltammetric and spectroscopic study of the adsorption and oxidation of benzoic acid on platinum and gold electrodes has been carried out in acid medium. The oxidation of benzoic acid depends on the surface structure of the platinum electrode. Benzoic acid is adsorbed through the carboxylate group in a twofold coordination at potentials above 0.4V/RHE on platinum electrodes and above 0.5V/RHEon a gold electrode. However, at lower potential it is adsorbed through the aromatic ring. The analysis of the potential dependent band center frequencies and integrated band intensities indicates that lateral interactions between adsorbed benzoate anions are responsible for the frequency shift observed with increasing potential. On platinum electrodes benzoic acid is reduced to cyclohexanecarboxylic acid at low potentials and is oxidized to CO2, quinones, and lactones, similarly to other aromatic compounds such as benzene. On gold electrodes, it is oxidized mainly to CO2.
Sponsor: Ministerio de Ciencia y Tecnología (MAT2001-1007) and Generalitat Valenciana (GV01-313).
URI: http://hdl.handle.net/10045/15299
ISSN: 0743-7463 (Print) | 1520-5827 (Online)
DOI: 10.1021/la0346705
Language: eng
Type: info:eu-repo/semantics/article
Rights: This document is the unedited author's version of a Submitted Work that was subsequently accepted for publication in Langmuir, copyright © American Chemical Society after peer review. To access the final edited and published work, see http://dx.doi.org/10.1021/la0346705
Peer Review: si
Publisher version: http://dx.doi.org/10.1021/la0346705
Appears in Collections:INV - GEPE - Artículos de Revistas

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