Preparation and characterisation of spinel oxide ferrites suitable for oxygen evolution anodes

摘要

The effect of the partial substitution of iron by Ni and also by Mn on the properties of the CoFe_2O_4 spinel type oxide has been studied. The oxide powders CoFe_(2-x)M_xO_4 were prepared by the standard ceramic method, and the respective structural characterisation performed by X-ray powder diffraction. In particular, the electric, magnetic and electrochemical behaviour of the monophasic mixed oxides have been analysed. From the synthesised oxide samples, iron coated electrodes were fabricated and tested as anode for the oxygen evolution reaction in alkaline medium.