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CuO/Ce x Sn1−x O2 catalysts: synthesis, characterization, and catalytic performance for low-temperature CO oxidation

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Abstract

Ce x Sn1−x O2 metal oxides were prepared by a citrate method and used as supports for CuO/Ce x Sn1−x O2 catalysts. The as-prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscopy, high-resolution TEM, and temperature-programmed reduction techniques. XRD analysis indicated that the Ce x Sn1−x O2 samples maintain the fluorite structure and form a solid solution when x = 0.9 or 0.8. TPR analysis revealed that two kinds of copper species are present on the surface of the Ce x Sn1−x O2 support. The catalytic properties of the CuO/Ce x Sn1−x O2 catalysts were evaluated for low-temperature CO oxidation using a microreactor-GC system. The effects of Ce/Sn ratio and CuO loading on the catalytic performance were investigated. The results showed that these CuO/Ce x Sn1−x O2 catalysts are very active for low-temperature CO oxidation. The 650 °C calcined 7 wt%-CuO/Ce x Sn1−x O2 catalyst exhibited the highest catalytic activity.

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Acknowledgments

The authors gratefully acknowledge the financial support of the Doctoral Foundation of Henan Polytechnic University (Nos. B2010-2 and B2010-67), the Science and Technology Supervise Project of China National Coal Association (MTKJ 2010-373 and 2010-378) and the Education Department Natural Science Foundation of Henan Province (2010B430013).

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Correspondence to Jian-Liang Cao or Zhan-Ying Zhang.

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Cao, J., Wang, Y., Sun, G. et al. CuO/Ce x Sn1−x O2 catalysts: synthesis, characterization, and catalytic performance for low-temperature CO oxidation. Transition Met Chem 36, 107–112 (2011). https://doi.org/10.1007/s11243-010-9441-3

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Keywords

  • SnO2
  • CeO2
  • Mixed Oxide
  • Fluorite Structure
  • Copper Species