Sensitivity of catalysis to surface structure: The example of CO oxidation on Rh under realistic conditions

J. Gustafson; R. Westerstroem; A. Mikkelsen; X. Torrelles; O. Balmes; N. Bovet; J. N. Andersen; C. J. Baddeley; E. Lundgren

doi:10.1103/PhysRevB.78.045423

Sensitivity of catalysis to surface structure: The example of CO oxidation on Rh under realistic conditions

J. Gustafson, R. Westerstroem, A. Mikkelsen, X. Torrelles, O. Balmes, N. Bovet, J. N. Andersen, C. J. Baddeley, E. Lundgren

Research output: Contribution to journal › Article › peer-review

Abstract

Using a combination of surface x-ray diffraction and mass spectrometry at realistic pressures, the CO oxidation reactivity of Rh(111) and Rh(100) model catalysts has been studied in conjunction with the surface structure. The measurements show that the presence of a specific thin surface oxide is crucial for the high activity of the Rh based CO oxidation. As this oxide is readily formed on all Rh facets, we conclude that the specific Rh crystal planes exposed during catalysis will not directly influence the reactivity. This is fortified by the very close similarity between the Rh(111) and the Rh(100) results.

Original language	English
Article number	045423
Number of pages	6
Journal	Physical Review. B, Condensed matter and materials physics
Volume	78
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.78.045423
Publication status	Published - Jul 2008

Keywords

MICROSCOPY
RHODIUM
PHASES

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10.1103/PhysRevB.78.045423

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Gustafson, J., Westerstroem, R., Mikkelsen, A., Torrelles, X., Balmes, O., Bovet, N., Andersen, J. N., Baddeley, C. J., & Lundgren, E. (2008). Sensitivity of catalysis to surface structure: The example of CO oxidation on Rh under realistic conditions. Physical Review. B, Condensed matter and materials physics, 78(4), Article 045423. https://doi.org/10.1103/PhysRevB.78.045423

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AU - Gustafson, J.

AU - Westerstroem, R.

AU - Mikkelsen, A.

AU - Torrelles, X.

AU - Balmes, O.

AU - Bovet, N.

AU - Andersen, J. N.

AU - Baddeley, C. J.

AU - Lundgren, E.

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N2 - Using a combination of surface x-ray diffraction and mass spectrometry at realistic pressures, the CO oxidation reactivity of Rh(111) and Rh(100) model catalysts has been studied in conjunction with the surface structure. The measurements show that the presence of a specific thin surface oxide is crucial for the high activity of the Rh based CO oxidation. As this oxide is readily formed on all Rh facets, we conclude that the specific Rh crystal planes exposed during catalysis will not directly influence the reactivity. This is fortified by the very close similarity between the Rh(111) and the Rh(100) results.

AB - Using a combination of surface x-ray diffraction and mass spectrometry at realistic pressures, the CO oxidation reactivity of Rh(111) and Rh(100) model catalysts has been studied in conjunction with the surface structure. The measurements show that the presence of a specific thin surface oxide is crucial for the high activity of the Rh based CO oxidation. As this oxide is readily formed on all Rh facets, we conclude that the specific Rh crystal planes exposed during catalysis will not directly influence the reactivity. This is fortified by the very close similarity between the Rh(111) and the Rh(100) results.

KW - MICROSCOPY

KW - RHODIUM

KW - PHASES

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JF - Physical Review. B, Condensed matter and materials physics

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Sensitivity of catalysis to surface structure: The example of CO oxidation on Rh under realistic conditions

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