Study on Catalytic Oxidation of Dimethylformamide by Sol-Gel Method

The CeCuO_x composite catalysts for the catalytic conversion of dimethyl formamide were prepared and catalyzed by the sol-gel method with a controlled amount of Cu. The physical and chemical properties and catalytic performance of the CeCuO_x composite catalysts were characterized by X-ray diffraction analysis, N₂ adsorption-desorption, scanning electron microscopy, X-ray photoelectron spectroscopy, and H₂-programmed step-up reduction. The results indicate that the doping of Cu increases the particle size of the CeO_x support and enhances the relative content of Ce³⁺ species on the CeO_x surface. The Cu/Ce ratio significantly influences the activity, product selectivity, and stability of the composite catalyst. Among them, Cu₈₀Ce₂₀ exhibits the best overall performance in the catalytic reaction of dimethylformamide.