
Nanostructured Nickel cobalt oxide Ni0.5Co2.5O4 powders were prepared by co-precipitation of hydroxides technique from mixed stoichiometric amounts ofhexahydrated nickel nitrate Ni(NO3)2.6H2O and of hexahydrated cobalt nitrate Co(NO3)2.6H2O (Aldrich) as sources of nickel and cobalt, respectively. X-ray diffraction (XRD) patterns showed that the oxides crystallize in a cubic spinel phase. Inductively coupled plasma-optical emission spectrometry (ICP-OES) confirms the stoichiometric proportions of metals in the cobaltites of nickel. The scanning electron microscopy (SEM) images reveal a porous structure. Cyclic and steady state voltammetries (CV and CSV) indicated high electrochemical properties.