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Ceria Nanocatalysts: Shape Dependent Reactivity and Formation of OH

Authors

  • Shilpa Agarwal,

    1. Catalytic Processes and Materials, MESA+ Institute of Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede (The Netherlands), Fax: (+31) (0)53-489-4683
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  • Prof. Dr. Leon Lefferts,

    1. Catalytic Processes and Materials, MESA+ Institute of Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede (The Netherlands), Fax: (+31) (0)53-489-4683
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  • Dr. Barbara L. Mojet

    Corresponding author
    1. Catalytic Processes and Materials, MESA+ Institute of Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede (The Netherlands), Fax: (+31) (0)53-489-4683
    • Catalytic Processes and Materials, MESA+ Institute of Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede (The Netherlands), Fax: (+31) (0)53-489-4683
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Abstract

Ceria nanoshapes (octahedra, wires, and cubes) were investigated for CO adsorption and subsequent reaction with water. Surprisingly, the reactivity of specific [BOND]OH groups was explicitly determined by the ceria nanoshape. The nanoshapes showed different levels of carbonates and formates after exposure to CO, the amount of carbonates increasing from octahedral≪wires<cubes. Subsequent reaction with water at 200 °C was also found to be shape dependent, resulting in different amounts of recovered [BOND]OH groups and removed carbonates and formates on the different ceria nanoshapes.

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