Efecto de los tratamientos térmicos sobre la reducibilidad y actividad de catalizadores de Pd soportado en un óxido mixto

Catalysts supported on SiO 2 , CeO 2 /SiO 2 ,C e 0,6 Zr 0,4 O x /SiO 2 and Ce 0,7 Tb 0,3 O x /SiO 2 were prepared by incipient wetness impregnation, using a Pd content of 0,5% w/w. The catalysts were characterized by X-ray Fluorescence (XRF), X-ray Diffraction (XRD), Temperatureprogrammed Reduction (TPR) and CO Chemisorption. The catalytic behavior was studied using CH4 oxidation reaction in stoichiometric conditions. XRD patterns indicated that the crystallinity of the samples was not affected after two catalytic reaction cycles. The TPR results showed