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<b>SYNTHESIS AND CHARACTERIZATION OF Ni<sub>0.4</sub>Co<sub>2.6</sub>O<sub>4</sub> SPINEL MIXED OXIDES POWDER: STUDY OF ITS SURFACE PROPERTIES BY VOLTAMMETRY, X-RAY, FTIR, UV-VIS-NIR SPECTROSCOPY AND SCANNING ELECTRON MICROSCOPY</b>
Abstract
Electrochemical studies were carried out on Ni0.4Co2.6O4 powders prepared by sol-gel via propionic acid method using cyclic and steady state voltammetries. The oxide surface was characterized by scanning electron microscopy (SEM), X-ray diffraction, UV-vis-NIR and FTIR spectroscopies. The results showed that the formation of homogeneous oxide with a single spinel phase occurred at 350°C. The surface redox couple NiOOH/Ni(OH)2 is confined on the surface material l.
KEY WORDS: Ni0.4Co2.6O4 spinel mixed oxides powder, Sol-gel process, Surface properties
Bull. Chem. Soc. Ethiop. 2005, 19(2), 213-220.
KEY WORDS: Ni0.4Co2.6O4 spinel mixed oxides powder, Sol-gel process, Surface properties
Bull. Chem. Soc. Ethiop. 2005, 19(2), 213-220.