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A modified CuO/CeO_2 catalyst was prepared by surfactant-assisted impregnation method and showed better catalytic activity for low temperature CO oxidation than that from conventional impregnation method.The physicochemical properties of different CuO/CeO_2 catalysts were characterized by thermogravimetric and differential scanning calorimetric measurements(TG-DSC),X-ray diffraction(XRD),N_2 adsorption-desorption,Raman spectroscopy,H_2 temperature-programmed reduction(H_2-TPR),temperature-programmed desorption of O_2(O_2-TPD),and diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS).The results suggested that the addition of hexadecyl trimethyl ammonium bromide(CTAB) into the impregnation solution could improve the dispersion of CuO species,which could facilitate Cu~(2+) incorporating into CeO_2 lattice and strengthened the synergistic effects between CuO and CeO_2,making the lattice oxygen more active,and eventually resulting in enhanced activity for CO oxidation.
A modified CuO / CeO 2 catalyst was prepared by surfactant-assisted impregnation method and showed better catalytic activity for low temperature CO oxidation than that from conventional impregnation method. Physicochemical properties of different CuO / CeO 2 catalysts were characterized by thermogravimetric and differential scanning calorimetric measurements ( TG-DSC, X-ray diffraction (XRD), N_2 adsorption-desorption, Raman spectroscopy, H_2 temperature-programmed reduction (H_2-TPR), temperature-programmed desorption of O_2 spectroscopy (DRIFTS). The results suggested that the addition of hexadecyl trimethyl ammonium bromide (CTAB) into the impregnation solution could improve the dispersion of CuO species, which could facilitate Cu 2+ (2+) into into CeO 2 lattice and strengthened the synergistic effects between CuO and CeO_2, making the lattice oxygen more active, and eventually resulting in enhanced activity for CO oxidation.