Spectroelectrochemical study of the oxidation of diaminophenols on platinum electrodes in acidic medium

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Title: Spectroelectrochemical study of the oxidation of diaminophenols on platinum electrodes in acidic medium
Authors: Salavagione, Horacio Javier | Arias Pardilla, Joaquín | Vázquez Picó, José Luis | Miras, María Cristina | Morallon, Emilia | Barbero, César Alfredo
Research Group/s: Electrocatálisis y Electroquímica de Polímeros
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad Nacional de Río Cuarto (Argentina). Departamento de Química
Keywords: Diaminophenol | In situ FTIR spectroscopy | Cyclic voltammetry | Platinum electrode | Oxidation
Knowledge Area: Química Física | Ciencia de Materiales
Date Created: 10-Dec-2004
Issue Date: 20-Sep-2005
Publisher: Elsevier
Citation: SALAVAGIONE, Horacio Javier, et al. "Spectroelectrochemical study of the oxidation of diaminophenols on platinum electrodes in acidic medium". Electrochimica Acta. Vol. 50, Issue 27 (20 Sept. 2005). ISSN 0013-4686, pp. 5414-5422
Abstract: The electrochemical oxidation of 2,3- 2,4- and 2,5-diaminophenol, on platinum electrode, in acid medium was studied using cyclic voltammetry, in situ UV–vis and in situ FTIR spectroscopies. The spectroscopic data indicates that 2,4-diaminophenol suffers hydrolysis giving the formation of 2-amino-hydroquinone/2-amino-p-benzoquinone in solution. The oxidation mechanism of 2,5-diaminophenol is similar to the p-phenylenediamine giving 2-hydroxy-p-benzoquinoneimine and its hydrolysis product, 2-hydroxy-p-benzoquinone. The electrochemical results suggest that 2,3-diaminophenol generates a non-electroactive polymeric material on the electrode surface.
Sponsor: Ministerio de Educación y Ciencia (MAT2004-1479); CONICET, FONCYT, Agencia Córdoba Ciencia y SECyT-UNRC.
URI: http://hdl.handle.net/10045/7824
ISSN: 0013-4686
DOI: 10.1016/j.electacta.2005.03.022
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.electacta.2005.03.022
Appears in Collections:INV - GEPE - Artículos de Revistas

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