A structural study of a C3H3 species coadsorbed with CO on Pd(111)

SURFACE SCIENCE

卷:602

Article

Knight, M. J.¹  Allegretti, F.¹  Kroeger, E. A.²  Polcik, M.²  Lamont, C. L. A.³  Woodruff, D. P.¹ 

[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[2] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

[3] Univ Huddersfield, Dept Chem & Biol Sci, Huddersfield HD1 3DH, W Yorkshire, England

关键词: surface structure;    photoelectron diffraction;    palladium;    furan;    hydrocarbons;   

DOI  :  10.1016/j.susc.2008.06.038

来源: Elsevier

【 摘 要 】

The combination of chemical-state-specific C 1s scanned-energy mode photoelectron diffraction (PhD) and O K-edge near-edge X-ray absorption fine structure (NEXAFS) has been used to determine the local adsorption geometry of the coadsorbed C3H3 and CO species formed on Pd(111) by dissociation of molecular furan. CO is found to adopt the same geometry as in the Pd(111)c(4 x 2)-CO phase, occupying the two inequivalent three-fold coordinated hollow sites with the C-O axis perpendicular to the surface. C3H3 is found to lie with its molecular plane almost parallel to the surface, most probably with the two 'outer' C atoms in equivalent off-atop sites, although the PhD analysis formally fails to distinguish between two distinct local adsorption sites. (C) 2008 Elsevier B.V. All rights reserved.

【 授权许可】

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