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INFLUENCE OF PRETREATMENT ON THE STRUCTURAL AND CATALYTIC PROPERTIES OF SUPPORTEDPdCATALYSTS FOR CO OXIDATION

Author

Listed:
  • CUN WEN

    (Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, P. R. China)

  • YI LIU

    (Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, P. R. China)

  • YUN GUO

    (Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, P. R. China)

  • YANQIN WANG

    (Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, P. R. China)

  • GUANZHONG LU

    (Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, P. R. China;
    Research Institute of Applied Catalysis, School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 200235, P. R. China)

Abstract

The effects of pretreating atmospheres (H2,O2andAr) on the activity forCOoxidation andPddispersion ofPd/Pr6O11catalyst were investigated. The result shows after thePd/Pr6O11catalyst was pretreated by hydrogen or oxygen at 550°C, its catalytic activity forCOoxidation can obviously increase, and the activity ofH2-pretreated catalyst is superior to that ofO2-pretreated catalyst, which is attributed to an increase ofPddispersion. The catalyst pretreated byArbehaves the worst catalytic activity forCOoxidation. The results ofCOpulse,COchemisorption andin situDRIFT testing indicate that the surface species (hydroxyl species or active oxygen species) generated during pretreating processes can preventPdparticles from immigrating and sintering, resulting in an increase of thePddispersion on the surface of support.

Suggested Citation

  • Cun Wen & Yi Liu & Yun Guo & Yanqin Wang & Guanzhong Lu, 2013. "INFLUENCE OF PRETREATMENT ON THE STRUCTURAL AND CATALYTIC PROPERTIES OF SUPPORTEDPdCATALYSTS FOR CO OXIDATION," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 20(02), pages 1-6.
    • Handle: RePEc:wsi:srlxxx:v:20:y:2013:i:02:n:s0218625x13500133
    DOI: 10.1142/S0218625X13500133
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