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  • Title: Preparation and characterization of copper-doped cobalt oxide electrodes.
    Author: Rosa-Toro AL, Berenguer R, Quijada C, Montilla F, Morallón E, Vazquez JL.
    Journal: J Phys Chem B; 2006 Nov 30; 110(47):24021-9. PubMed ID: 17125373.
    Abstract:
    Cobalt oxide (Co3O4) and copper-doped cobalt oxide (CuxCo(3-x)O4) films have been prepared onto titanium support by the thermal decomposition method. The electrodes have been characterized by different techniques such as cyclic voltammetry, scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy (XPS). The effect on the electrochemical and crystallographic properties and surface morphology of the amount of copper in the oxide layer has been analyzed. 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 CuO phase segregates at the surface. The analysis of the surface cation distribution indicates that Cu(II) has preference for octahedral sites.
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