The g-Al2O3 was previously degassed in nitrogen and the metal precursors were dissolved in water. The solid was then impregnated with this solution according to the method described by Narasimhan et al., Narasimhan, 1990.
Los precursores metálicos se disolvieron en agua y la γ-Al2O3, previamente desgasificada en nitrógeno, se impregnó con esta solución de acuerdo al método descrito por Narasimhan et al. Narasimhan, 1990.