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Comparison Between Turnover Rates of CO Oxidation over Rh0 or Rhx+ Supported on Model Three-Way Catalysts

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Abstract

The kinetics of CO oxidation over two catalytic sites, either 100% zero-valent or 100% oxidised rhodium atoms, were studied. It was shown that an oxidised rhodium species exhibits a significant higher turnover rate in CO oxidation (factor 25) than the corresponding zero-valent one. This noticeable difference, interpreted with respect to mechanistic considerations, led us to conclude that one of the promoting effects of ceria–zirconia is to stabilise rhodium atoms as oxidised species.

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Authors and Affiliations

  1. Laboratoire de Réactivité de Surface, Université Pierre et Marie Curie, CNRS UMR 7609, Case 178, 4 Place Jussieu, 75252, Paris Cedex 05, France

    Isabelle Manuel, Cyril Thomas & Gérald Djéga-Mariadassou

  2. PSA Peugeot Citroën, 18 rue des Fauvelles, 92250, La Garenne-Colombes, France

    Isabelle Manuel, Christelle Bourgeois, Hervé Colas & Nils Matthess

Authors
  1. Isabelle Manuel
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  2. Cyril Thomas
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  3. Christelle Bourgeois
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  4. Hervé Colas
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  5. Nils Matthess
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  6. Gérald Djéga-Mariadassou
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Manuel, I., Thomas, C., Bourgeois, C. et al. Comparison Between Turnover Rates of CO Oxidation over Rh0 or Rhx+ Supported on Model Three-Way Catalysts. Catalysis Letters 77, 193–195 (2001). https://doi.org/10.1023/A:1013228132710

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  • DOI: https://doi.org/10.1023/A:1013228132710

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