Evaluation of the electrocatalytic activity of antimony-doped tin dioxide anodes toward the oxidation of phenol in aqueous solutions

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Title: Evaluation of the electrocatalytic activity of antimony-doped tin dioxide anodes toward the oxidation of phenol in aqueous solutions
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 de Alicante | Universidad Miguel Hernández. Instituto de Biología Molecular y Celular
Keywords: Antimony-doped tin dioxide anode | Phenol oxidation | Electrocatalytic activity
Knowledge Area: Química Física
Date Created: 19-May-2005
Issue Date: 25-Aug-2005
Publisher: The Electrochemical Society
Citation: MONTILLA JIMÉNEZ, Francisco; MORALLÓN NÚÑEZ, Emilia; VÁZQUEZ PICÓ, José Luis. "Evaluation of the electrocatalytic activity of antimony-doped tin dioxide anodes toward the oxidation of phenol in aqueous solutions". Journal of The Electrochemical Society. Vol. 152, Issue 10 (2005). ISSN 0013-4651, pp. B421-B427
Abstract: Antimony-doped tin dioxide electrodes supported on titanium have been used in the electrochemical treatment of aqueous solution containing phenol. Ti/SnO2–Sb anode has high efficiency in the elimination of phenol, but its use is hindered by its short service life. The introduction of platinum in the oxide layer (3 or 13 atom %)increases the electrode service life up to two orders of magnitude. The electrocatalytic activity of the electrodes toward phenol oxidation has been analyzed with respect to the amount of platinum in the electrode composition. Voltammetric studies show that the oxidation potential of phenol decreases with the amount of platinum in the oxide layer. The activity for phenol oxidation per electroactive site is higher with the Sb-doped SnO2 electrode within the zone of electrochemical stability of the solvent. Galvanostatic electrolysis of phenol solutions was performed analyzing several factors that affect the efficiency of the elimination process, such as anode composition, cell design, current density, and phenol concentration. The electrode containing platinum (3 atom %)presents the highest efficiency for phenol removal, even higher than Sb-doped SnO2.
Sponsor: Financial support by the Generalitat Valenciana (GRUPOS04/75 and GV05/136) and Ministerio de Ciencia y Tecnología (MAT2004- 01479) projects are gratefully acknowledged. Universidad de Alicante assisted in meeting the publication costs of this article.
URI: http://hdl.handle.net/10045/3134
ISSN: 0013-4651
DOI: 10.1149/1.2013047
Language: eng
Type: info:eu-repo/semantics/article
Rights: © The Electrochemical Society, Inc. 2005. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in Journal of The Electrochemical Society, 152 (10) B421-B427 (2005). http://ecsdl.org/dbt/dbt.jsp?KEY=JESOAN&Volume=LASTVOL&Issue=LASTISS
Peer Review: si
Publisher version: http://dx.doi.org/10.1149/1.2013047
Appears in Collections:INV - GEPE - Artículos de Revistas

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