Highly active titania supported ceria catalysts for ammoxidation of picolines

摘要: TiO2 supported ceria catalysts with 20 wt% CeO2 were prepared by impregnating rutile and anatase polymorphs in aqueous solution of ammonium ceric nitrate [(NH4)2Ce(NO3)6], characterized BET surface area measurement low temperature oxygen chemisorption (LTOC) at −78°C evaluated for ammoxidation β- γ-picolines. Anatase catalyst has exhibited higher activities than one pure ceria. Turnover frequencies calculated from rates irreversible O2 uptakes respect to a particular picoline isomer almost equal supports on hand the other. The two structural isomers, γ-picolines seem have marked steric effect their reactivity catalysis catalysts.