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Pd(111) versus Pd–Au(111) in carbon monoxide oxidation under elevated pressures

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Abstract

The oxidation of CO on Pd(111) and Pd70Au30(111) has been studied under pressures upto 100 Torr. Gold is found to decrease the surface activity by inhibiting oxygen dissociation. For a sufficient conversion time depending on the CO coverage and the surface identity, a dramatic boost of activity occurs. This is ascribed to a switch from CO-induced inhibition of O2 adsorption to a regime determined by CO adsorption. The other kinetic features are explained by oxidation of palladium and adsorption-induced restructuring of the surfaces.

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Author notes

  1. A. Piednoir

    Present address: LPMCN, UMR CNRS 5586, 43 Boulevard du 11 novembre 1918, 69622, Villeurbanne, France

  2. M. A. Languille

    Present address: UCCS, UMR CNRS 8181, 59655, Villeneuve d’Ascq, France

Authors and Affiliations

  1. IRCELYON, UMR 5256 CNRS et Université Claude Bernard – Lyon 1, 2 Avenue Albert Einstein, 69626, Villeurbanne Cedex, France

    A. Piednoir, M. A. Languille, L. Piccolo, A. Valcarcel, F. J. Cadete Santos. Aires & J. C. Bertolini

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  1. A. Piednoir
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  2. M. A. Languille
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  3. L. Piccolo
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  4. A. Valcarcel
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  5. F. J. Cadete Santos. Aires
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  6. J. C. Bertolini
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Correspondence to L. Piccolo.

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Piednoir, A., Languille, M.A., Piccolo, L. et al. Pd(111) versus Pd–Au(111) in carbon monoxide oxidation under elevated pressures. Catal Lett 114, 110–114 (2007). https://doi.org/10.1007/s10562-007-9047-3

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  • DOI: https://doi.org/10.1007/s10562-007-9047-3

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