Abstract
The physicochemical, surface and catalytic properties of pure and La2O3-doped CuO-NiO solids prepared by sol-gel method were investigated. The dopant concentrations Of La2O3 were 2.0, 4.0 and 6.0 mol%. The solids investigated were calcined at 400 and 600 degrees C. The techniques employed were XRD, EDX, TEM, surface excess oxygen, nitrogen adsorption at -196 degrees C and catalytic oxidation of CO by O-2 at 150-400 degrees C using both static and flow methods. The results revealed that La2O3 doping of the system investigated followed by calcination at 400 and 600 degrees C led to a considerable increase in its catalytic activity in CO oxidation by O-2 carried out using static and flow methods. The doping process was not accompanied by any change in the activation energy of the catalyzed reaction. (C) 2009 Elsevier B.V. All rights reserved.