Preparación y caracterización superficial de electrodos de espinela de cobalto dopados con cobre, Cux Co3-x O4, 0≤x≤1.5

  1. La Rosa Toro, A. 1
  2. Berenguer, R. 2
  3. Quijada, C. 3
  4. Montilla, F. 4
  5. Morallón, E. 2
  6. Vázquez, L. 2
  1. 1 Facultad de Ciencias, Universidad Nacional de Ingeniería. Lima, Perú.
  2. 2 Departamento de Química Física e Instituto Universitario de Materiales, Universidad de Alicante
  3. 3 Departamento de Ingeniería Textil y Papelera, Universidad Politécnica de Valencia
  4. 4 Instituto de Biología Molecular y Celular, Universidad Miguel Hernández
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Journal:
TECNIA

ISSN: 0375-7765

Year of publication: 2006

Volume: 16

Issue: 2

Pages: 33-42

Type: Article

DOI: 10.21754/TECNIA.V16I2.390 DIALNET GOOGLE SCHOLAR lock_openOpen access editor

More publications in: TECNIA

Abstract

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.

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