A series of ceria and ceria-zirconia supported Pd model automotive catalysts were prepared and aged under air or redox conditions at 1050°C for 12 h. The supports were manufactured by different methods and represent a range of compositions. The samples were characterized before and after aging by BET, X-ray diffraction, mercury porosimetry, XPS, H2 temperature-programmed reduction, and oxygen storage capacity measurements. Oxygen storage measurements revealed that the behavior of the catalysts varied according to aging conditions and temperature of measurement. Pd/ceria-zirconia catalysts showed higher oxygen storage characteristics after 1050°C aging than Pd/ceria catalysts, and the phase purity of the ceria-zirconia was shown to positively affect the amount of oxygen storage. The initial rates of oxygen release from the model catalysts at 350°C were shown to depend on the preparation conditions of the supports. Sweep tests were carried out on Pd/ceria-zirconia, and showed that high oxygen storage and conversion efficiencies remain after redox aging at 1050°C.


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    Titel :

    High Temperature Stability of Ceria-Zirconia Supported Pd Model Catalysts


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Graham, George W. (Autor:in) / Jen, Hung-Wen (Autor:in) / Cuif, Jean-Pierre (Autor:in) / Marczi, Mike (Autor:in) / McCabe, Robert W. (Autor:in) / Deutsch, Steve (Autor:in) / Chung, Woosang (Autor:in)

    Kongress:

    International Congress & Exposition ; 1998



    Erscheinungsdatum :

    23.02.1998




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    Cuif,J.P. / Deutsch,S. / Marczi,M. et al. | Kraftfahrwesen | 1998


    High Temperature Stability of Ceria-Zirconia Supported Pd Model Catalysts

    Cuif, J.-P. / Deutsch, S. / Marczi, M. et al. | British Library Conference Proceedings | 1998


    Reactor Evaluation of Ceria-Zirconia as an Oxygen Storage Material for Automotive Catalysts

    Brenner, Alan / Hori, Carla E. / Belton, David N. et al. | SAE Technical Papers | 1997


    Reactor Evaluation of Ceria-Zirconia as an Oxygen Storage Material for Automotive Catalysts

    Permana, H. / Belton, D. N. / Rahmoeller, K. M. et al. | British Library Conference Proceedings | 1997