ELECTROCHEMICAL STUDY OF IRON(II) AND IRON(III) COMPOUND MIXTURES IN THE SOLID-STATE - APPLICATION TO MAGNETITE CHARACTERIZATION

The electrochemical behaviour of mixtures of several iron(II) and iron (III) compounds was studied in acidic media at a carbon paste electrod e. Voltammetric techniques were used to obtain electrochemical spectra of these mixtures which were interpreted in order to elucidate the na ture of their electrochemical transformations. Appropriate limited pot ential scans were used to verify the identity of the different chemica l species involved in the electrochemical reactions. Finally, the elec trochemical behaviour of magnetite was investigated and a theoretical explanation of the different processes was proposed based on its cryst allographic structure.