Catalysis Letters

, Volume 82, Issue 1–2, pp 19–27 | Cite as

Redox Properties and Catalytic Behavior of Praseodymium-Modified (Ce-Zr)O2 Solid Solutions in Three-Way Catalysts

  • Wendong Wang
  • Peiyan Lin
  • Yilu Fu
  • Gengyu Cao
Article

Abstract

The three-way catalyst promoters (Ce-Zr)O2, (Pr-Ce-Zr)O2 and (Pr-Zr)O2 were prepared by the sol-gel method. The reduction/oxidation behavior of these mixed oxides was compared. It is shown that the formation of (Pr-Zr)O2 cubic solid solution at high temperature up to 800 °C makes it more reducible, and that the ternary solid solution that formed in (Pr-Ce-Zr)O2 mixed oxides plays an important role in the reduction process. The catalytic performance tests reveal that the introduction of a small amount of praseodymium into (Ce-Zr)O2 favors the light-off temperature of C3H6 and NO and the effectiveness for NO conversion at the lean region.

three-way catalyst praseodymium (Ce-Zr)O2 solid solution redox properties sol-gel method 

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Copyright information

© Plenum Publishing Corporation 2002

Authors and Affiliations

  • Wendong Wang
    • 1
  • Peiyan Lin
    • 1
  • Yilu Fu
    • 1
  • Gengyu Cao
    • 1
  1. 1.Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefeiPR China

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