title: Preparation of IrO2-Ta2O5|Ti electrodes by immersion, painting and electrophoretic deposition for the electrochemical removal of hydrocarbons from water.
abstract: After intense years of great development, the electrochemical technologies have become very suitable alternatives in niche markets like industrial wastewater reclamation and soil remediation. A key role to achieve a high efficiency in such treatments is played by the characteristics of the coating of the electrodes employed. This paper compares three techniques, namely immersion, painting and electrophoresis, for the preparation of IrO2-Ta2O5ǀTi, so-called dimensionally stable anodes (DSA(®)). The quality of the coatings has been investigated by means of surface and electrochemical analysis. Their ability to generate hydroxyl radicals and degrade aqueous solutions of hydrocarbons like phenanthrene, naphthalene and fluoranthene has been thoroughly assessed. Among the synthesis techniques, electrophoretic deposition yielded the best results, with DSA(®) electrodes exhibiting a homogeneous surface coverage that led to a good distribution of active sites, thus producing hydroxyl radicals that were able to accelerate the degradation of hydrocarbons.
authors.affiliation: Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C. Parque Tecnológico Querétaro, Sanfandila, Pedro Escobedo, 76703 Querétaro, Mexico; Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
authors.forename: Rosa Alhelí
authors.initials: RA
authors.lastname: Herrada
authors.affiliation: Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C. Parque Tecnológico Querétaro, Sanfandila, Pedro Escobedo, 76703 Querétaro, Mexico; Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Medel
authors.affiliation: Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C. Parque Tecnológico Querétaro, Sanfandila, Pedro Escobedo, 76703 Querétaro, Mexico.
authors.forename: Federico
authors.initials: F
authors.lastname: Manríquez
authors.affiliation: Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain. Electronic address: i.sires@ub.edu.
authors.forename: Ignasi
authors.initials: I
authors.lastname: Sirés
authors.affiliation: Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C. Parque Tecnológico Querétaro, Sanfandila, Pedro Escobedo, 76703 Querétaro, Mexico. Electronic address: ebustos@cideteq.mx.
authors.forename: Erika
authors.initials: E
authors.lastname: Bustos
keywords: Dimensionally stable anode; Electro-oxidation; Hydrocarbon; Hydroxyl radical; Water treatment