S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Journal Papers (저널논문_화학생물공학부)
Doping effect of precious metal on the activity of CuO-CeO2 catalyst for selective oxidation of CO
- Jung, Chang Ryul; Kundu, Arunabha; Nam, Suk-Woo; Lee, Ho-In
- Issue Date
- Applied Catalysis A: General 331 (2007) 112–120
- Selective oxidation of carbon monoxide; CuO-CeO2 catalyst; Cu-Ce-O solid solution; Doping effect; Precious metal
- Precious metals (Pt, Pd and Ru)-doped copper oxide-ceria (CuO-CeO2) catalysts were prepared by a combination of conventional coprecipitation
and impregnation methods and evaluated for the selective oxidation of carbon monoxide in a hydrogen-rich gas stream. It was found
that the doping with the precious metal did not change the crystal structure of the catalyst. The binding energy of copper in the precious metaldoped
CuO-CeO2 catalyst shifted to a higher value. This indicates that a part of the copper in the CuO-CeO2 catalyst is phase-separated and there is
some possibility of the formation of copper chloride on the surface of the catalyst. The added precious metal inhibited the phase separation of
copper. The degree of phase separation depended on the type of precious metal and the amount of precious metal loading. The catalytic activity for
selective oxidation of carbon monoxide (CO) was the highest in the case of Pt-doped catalyst due to the strong interaction between doped Pt and
CuO-CeO2 catalyst. However, the activity of Pd- or Ru-doped catalyst for selective oxidation of CO was much less because doped Pd and Ru have
good activity for hydrogen oxidation.
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