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PHOTOEMISSION STUDY OF THE REACTION OF CO WITH SmFILMS ON THE Ru(001) SURFACE

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Listed:
  • G. RANGA RAO

    (Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India;
    Institute for Molecular Science, Myodaiji, Okazaki 444 8585, Japan)

  • H. NOZOYE

    (Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan)

Abstract

Photoemission spectroscopy (Ru 3d/C 1s and O 1s regions) has been used to investigate the formation of carbonate species on the Sm- andSmOx-covered Ru(001) surfaces at small exposures of CO. The results indicate that the reaction of ~ 1 L CO with disordered Sm layers on the Ru surface at 105 K produces surface carbonate and weakly boundCO2via the Boudouard reaction(2COg→CO2,ad+Cad). The latter species desorbs below 250 K, whereas the former is stable up to 500 K. The surface carbonate species is detected by the O 1s features as well as the C 1s feature developed in the Ru 3d region upon CO exposure. The CO reaction with theSmOxlayer also leads to the formation of surface carbonate. The generation of carbonate on Sm andSmOxfilms seems to be related to the ionization of Sm atoms and the defects present in the partly oxidized Sm, respectively.

Suggested Citation

  • G. Ranga Rao & H. Nozoye, 2003. "PHOTOEMISSION STUDY OF THE REACTION OF CO WITH SmFILMS ON THE Ru(001) SURFACE," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 10(06), pages 917-923.
    • Handle: RePEc:wsi:srlxxx:v:10:y:2003:i:06:n:s0218625x03005700
    DOI: 10.1142/S0218625X03005700
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    Keywords

    Sm2O3; Ru(001); surface carbonate; CO;
    All these keywords.

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