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Pt or Pd-doped Au/SnO2 Catalysts: High Activity for Low-temperature CO Oxidation

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Abstract

yAu/SnO2 (y = 1–5 wt%) and 1 wt% Pt- or Pd-doped 3Au/SnO2 catalysts were prepared by the co-precipitation method. It is observed that the 3Au/SnO2 catalyst showed the best performance (T100% = 166 °C). The pretreatment of 3Au/SnO2 in CO obviously decreased the catalytic activity due to the reduction of oxidized gold species to metallic Au0. Pd- or Pt-doping to 3Au/SnO2 brought about a significant enhancement in performance, with the T100% value being 74 and 93 °C, respectively. It is concluded that the oxidized gold species were more active than metallic Au0 and the remarkable improvement in catalytic activity due to Pd or Pt doping was associated with the presence of strong interaction of Pd or Pt with Au.

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Acknowledgements

The work was supported by the National Natural Science Foundation of China (Grant No. 20777005), Natural Science Foundation of Beijing Municipality (Grant No. 8082008) and Beijing Municipal Foundation for Excellent Person of Ability (Grant No. 20071D0501500210).

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Correspondence to Qing Ye or Hongxing Dai.

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Ye, Q., Wang, J., Zhao, J. et al. Pt or Pd-doped Au/SnO2 Catalysts: High Activity for Low-temperature CO Oxidation. Catal Lett 138, 56–61 (2010). https://doi.org/10.1007/s10562-010-0360-x

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  • DOI: https://doi.org/10.1007/s10562-010-0360-x

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