Please use this identifier to cite or link to this item:
|Title: ||Studies on Fe-Co spinel electrodes|
|Authors: ||Cartaxo, Marco|
|Keywords: ||Co-Fe spinel oxides|
|Issue Date: ||Aug-2007|
|Abstract: ||FeCo2O4 spinel oxide pelleted electrodes were prepared from the respective powders, obtained by low-temperature coprecipitation method. X-ray diffraction studies suggest the coexistence of two spinel phases, with different a-cell parameters. The samples show semiconductor-type behaviour, in the range 530-340 K. The estimated activation energy for conduction is about 0.7 eV. These phases are stable, after being used as electrode materials, as the XRD and SEM/EDS results show. Cyclic voltammetry has been used to investigate the electrochemical behaviour of the FeCo2O4 electrodes in 1 mol dm-3 KOH aqueous solutions. The voltammetric data allowed finding out the redox reactions occurring at the electrode surface, namely Fe3O4.4H2O/Fe(OH)2 or Fe3O4/Fe2O3 and CoO2/CoOOH by comparing the experimental results with those referred in the literature.|
|Appears in Collections:||QUI - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.