IDEAS home Printed from https://ideas.repec.org/a/wsi/srlxxx/v15y2008i01n02ns0218625x0801110x.html
   My bibliography  Save this article

CO-OXIDATION CATALYZED BY NANOCRYSTALLINECeO2PARTICLES WITH DIFFERENT MORPHOLOGIES

Author

Listed:
  • W. Y. PONG

    (Department of Chemical Engineering, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan)

  • H. Y. CHANG

    (Department of Chemical Engineering, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan)

  • H. I. CHEN

    (Department of Chemical Engineering, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan)

  • J. R. CHANG

    (Department of Chemical Engineering, National Chung Cheng University, 168 University Road, Min-Hsiung Chia-Yi, Taiwan)

Abstract

Nanocrystalline cerium oxide(CeO2)particles prepared by the novel two-stage precipitation method were used for the catalysis ofCOoxidation. Firstly, two shapes, i.e. particulate(P-)and needle-like(N-),CeO2nanoparticles were formed via proposed temperature-arranged routes. The crystalline structure, morphology, particle size, and surface area of samples were characterized by using XRD, TEM, HRTEM, and BET techniques. Furthermore, the morphological effect of theCeO2samples on the catalytic activity ofCOoxidation was investigated. From the experimental results, it indicated that the prepared samples were all nonporous and fcc-structuredCeO2. TheCeO2particles, as precipitating at 90°C for 5 min and then aging at 90°C, were particulate, whereas they were needle-like by aging at 0°C. TheCOoxidation reaction showed that the catalytic activity ofN-CeO2nanoparticles was higher than that ofP-CeO2, attributing from the exposed higher-energy {100} and {110} facets forN-CeO2nanoparticles. Moreover, the calcined samples with higher degree of crystallinity showed further promotion in catalytic activity. It was also worthy to note, that by replacing theCeO2catalyst byPd/CeO2, a large increase in theCOconversion was found, especially catalyzed byPd/N-CeO2.

Suggested Citation

  • W. Y. Pong & H. Y. Chang & H. I. Chen & J. R. Chang, 2008. "CO-OXIDATION CATALYZED BY NANOCRYSTALLINECeO2PARTICLES WITH DIFFERENT MORPHOLOGIES," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 15(01n02), pages 123-131.
    • Handle: RePEc:wsi:srlxxx:v:15:y:2008:i:01n02:n:s0218625x0801110x
    DOI: 10.1142/S0218625X0801110X
    as

    Download full text from publisher

    File URL: http://www.worldscientific.com/doi/abs/10.1142/S0218625X0801110X
    Download Restriction: Access to full text is restricted to subscribers
    File URL: https://libkey.io/10.1142/S0218625X0801110X?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    More about this item

    Keywords

    CeO2; nanoparticles; CO oxidation; needle-like; catalysts;
    All these keywords.

    JEL classification:

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:wsi:srlxxx:v:15:y:2008:i:01n02:n:s0218625x0801110x. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Tai Tone Lim (email available below). General contact details of provider: http://www.worldscinet.com/srl/srl.shtml .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.