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Citation: HE Chong-Heng, ZHU Ming, JIN Guo-Lin, XU Pei-Ruo, WANG Ren. Effects of Cerium Oxide on the Oxidation Activity and Thermal Stability of Pd/Al₂O₃ Catalysts[J]. Chinese Journal of Applied Chemistry, ;2004, 21(2): 154-158. shu

Effects of Cerium Oxide on the Oxidation Activity and Thermal Stability of Pd/Al₂O₃ Catalysts

1.
a College of Chemical Engineering, East China University of Science & Technology, Shanghai 200237;
2.
b Center of Analysis, Shanghai Research Institute of Petrochemical Technology, Shanghai

Corresponding author: HE Chong-Heng,
Received Date: 25 April 2003
Available Online: 30 September 2003
Fund Project: 国家教委行动计划华东理工大学基金资助项目(XD20A01301) (XD20A01301)

The effects of cerium oxide on the catalytic activity and the thermal stability of Pd/Al₂O₃ were investigated. It was found that the cerium oxide improved the performance of Pd/Al₂O₃ catalysts in removal of CO and C₃H₆ from simulated exhaust gas. The cerium oxide could widen the operation-window of oxidation reaction under reduction conditions (λ>1) due to its high oxygen storage-release capacity. Moreover, a great advantage of cerium oxide as a promoter is that it stabilizes the dispersion of Pd particles on the surface of Al₂O₃ during the sintering process. It may be due to the interaction of Pd with cerium oxide to form a Pd^δ+ species which are more stable than Pd⁰ at high temperature.
- palladium catalyst,
- cerium oxide,
- catalytic oxidation,
- thermal stability
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Effects of Cerium Oxide on the Oxidation Activity and Thermal Stability of Pd/Al₂O₃ Catalysts