On the adsorption sites for CO on the Rh(111) single crystal surface

Surface Science

Volumn 371, Issue 2-3, 1997, Pages 381-389

  Beutler, A ^a   Lundgren, E ^a   Nyholm, R ^a   Andersen, J N ^a   Setlik, B ^b   Heskett, D ^b  

^a LUND UNIVERSITY   (Sweden)

^b NONE

Author keywords

Carbon monoxide; Chemisorption; Photoelectron diffraction; Rhodium; Single crystal surfaces; Soft X ray photoelectron spectroscopy; Surface structure, morphology, roughness and topography

Indexed keywords

BINDING ENERGY; CARBON MONOXIDE; CHEMISORPTION; ELECTRON DIFFRACTION; GAS ADSORPTION; MOLECULES; MONOLAYERS; MORPHOLOGY; PHOTOEMISSION; RHODIUM; SURFACE ROUGHNESS; X RAY PHOTOELECTRON SPECTROSCOPY;

PHOTOELECTRON DIFFRACTION; PHOTON ENERGY; SURFACE TOPOGRAPHY;

SINGLE CRYSTALS;

EID: 0031078070     PISSN: 00396028     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0039-6028(96)01014-X     Document Type: Article

References (19)

1. H. Antonsson, A. Nilsson, N. Mårtensson, I. Panas and P.E.M. Siegbahn, J. Electron Spectrosc. Relat. Phenom. 54/55 (1990) 601.
2. J.N. Andersen, M. Qvarford, R. Nyholm, S.L. Sorensen and C. Wigren, Phys. Rev. Lett. 67 (1991) 2822.
3. J.N. Andersen, M. Qvarford, R. Nyholm and J.F. van Acker, Phys. Rev. Lett. 68 (1992) 94; J.N. Andersen, E. Lundgren, R. Nyholm and M. Qvarford, Surf. Sci. 289 (1993) 307.
4. J.N. Andersen, M. Qvarford, R. Nyholm and J.F. van Acker, Phys. Rev. Lett. 68 (1992) 94; J.N. Andersen, E. Lundgren, R. Nyholm and M. Qvarford, Surf. Sci. 289 (1993) 307.
5. O. Björneholm, A. Nilsson, H. Tillborg, P. Bennich, A. Sandell, B. Hernnäs, C. Puglia and N. Mårtensson, Surf. Sci. 315 (1994) L983.
6. P.A. Thiel, E.D. Williams, J.T. Yates and W.H. Weinberg, Surf. Sci. 84 (1979) 54.
7. A. Beutler, E. Lundgren, R. Nyholm, B. Setlik, D. Heskett and J.N. Andersen, unpublished.
8. L.H. Dubois and G.A. Somorjai, Surf. Sci. 91 (1980) 514.
9. R.J. Koestner, M.A. Van Hove and G.A. Somorjai, Surf. Sci. 107 (1981) 439.
10. M.A. Van Hove, R.J. Koestner, J.C. Frost and G.A. Somorjai, Surf. Sci. 129 (1983) 482.
11. L.A. DeLouise, E.J. White and N. Winograd, Surf. Sci. 147 (1984) 252.
12. In Ref. [7] it is concluded that bridge sites start to become populated at coverages above 0.33 ML, whereas this according to Ref. [10] does not happen before the coverage is increased to above 0.5 ML.
13. R. Nyholm, S. Svensson, J. Nordgren and S.A. Flodström, Nucl. Instrum. Methods A 246 (1986) 267.
14. J.N. Andersen, O. Björneholm, A. Sandell, R. Nyholm, J. Forsell, L. Thånell, A. Nilsson and N. Mårtensson, Sychrotron Radiat. News 4 (4) (1991) 15.
15. J.J. Yeh and I. Lindau, At. Data Nucl. Data Tables 32 (1985) 1.
16. See for example, W.F. Egelhoff, Jr., Surf. Sci. Rep. 6 (1986) 253, and references therein.
17. O. Björneholm, A. Nilsson, E.O.F. Zdansky, A. Saadell, B. Hernnäs, H. Tillborg, J.N. Andersen and N. Mårtensson, Phys. Rev. B 46 (1992) 10353.
18. J.N. Andersen, D. Hennig, E. Lundgren, M. Methfessel, R. Nyholm and M. Schemer, Phys. Rev. B 50 (1994) 17525.
19. Similar intensity ratios between the two surface related components are found at other photon energies (360eV, 370 eV, 390 eV) excluding the possibility that the intensity ratio at 380 eV should be heavily influenced by diffraction. It should also be realized that, as in the present case we only have to distinguish between bridge and on-top adsorption, it is only necessary to establish whether the intensity ratio between the CO-induced and the non-perturbed peaks is 1:2 (on-top) or 2:1 (bridge). This greatly decreases the demands on the accuracy of the decomposition.