Preparation and superficial characterization of drugged cobalt spinel electrodes with copper, Cux Co3-x O4, 0≤x≤1.5

• Autores: La Rosa Toro, A., Berenguer, R., Quijada, C., Montilla, F., Morallón, E., Vázquez, L.
• Formato: artículo
• Fecha de Publicación: 2006
• Institución: Universidad Nacional de Ingeniería
• Repositorio: Revistas - Universidad Nacional de Ingeniería
• Lenguaje: español
• OAI Identifier: oai:oai:revistas.uni.edu.pe:article/390
• Enlace del recurso: https://revistas.uni.edu.pe/index.php/tecnia/article/view/390
• Nivel de acceso: acceso abierto
• Materia: espinela de cobalto; electrodo de Co3O4; caracterizacion superficial; cobalt spinel; Co3O4 electrode; XPS surface characterization

Cobalt oxide (Co3O4) and copper-doped cobalt oxide (CuxCo3-xO4) films supported on titanium have been prepared by the thermal decomposition method. The electrodes have been characterized by different techniques like scanning Electron Microscopy (SEM), cyclic voltammetry (CV), and X-Ray photoelectron spectroscopy (XPS). The XPS spectra correspond to a characteristic monophasic Cu-Co spinel oxides when x is below 1. However, when the copper content exceeds that for the stoichiometric CuCo2O4 spinel, a new CuOphase segregates at the surface. The analysis of the surface cation distribution in spinel structure indicates that Cu(II) cation are preferently located in octahedral sites of higher electrochemical activity.