Catalysis Letters

, Volume 82, Issue 1, pp 19–27

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

Authors

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

DOI: 10.1023/A:1020575604843

Cite this article as:
Wang, W., Lin, P., Fu, Y. et al. Catalysis Letters (2002) 82: 19. doi:10.1023/A:1020575604843

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 catalystpraseodymium(Ce-Zr)O2 solid solutionredox propertiessol-gel method

Copyright information

© Plenum Publishing Corporation 2002