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Citation: HUANG Hai-feng, WANG Lu-yun, QI Zhong-hua, LU Han-feng. Activity and sulfur resistance of Pt-Pd/CeO2 catalysts for the oxidation of diesel exhaust[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(11): 1401-1408. shu

Activity and sulfur resistance of Pt-Pd/CeO2 catalysts for the oxidation of diesel exhaust

  • 1.

    1. College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China;

  • Corresponding author: LU Han-feng, 
  • Received Date: 6 February 2013
    Available Online: 22 April 2013

  • A series of Pt-Pd/CeO2 catalysts with different Pt/Pd ratios were synthesized by impregnation method; their catalytic activity and sulfur resistance in the oxidation of diesel exhaust were investigated. The results showed that Pt-Pd synergy is able to reduce the ignition temperature and broaden the active window of Pt-Pd/CeO2 catalysts for the oxidation of diesel exhaust. The ratio of Pt/Pd has a great effect on catalytic performance; The Pt0.2Pd0.8/CeO2 catalyst shows the highest activity in the oxidation of simulated diesel exhaust containing C3H6, CO and NO. H2-TPR results suggest that the amount of surface active oxygen increases with the Pt/Pd ratio, which is also well related to the sulfur resistance of the Pt-Pd/CeO2 catalysts; higher Pt/Pd ratio is of benefit to the oxidation of diesel exhaust in the presence of SO2, as the active sites of PtO2 and PdO are easily covered by sulfate.
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