The adsorption site and orientation of CH3S on Ni(111)

被引:40
作者
Mullins, DR
Huntley, DR
Tang, T
Saldin, DK
Tysoe, WT
机构
[1] UNIV WISCONSIN,DEPT CHEM,MILWAUKEE,WI 53211
[2] UNIV WISCONSIN,SURFACE STUDIES LAB,MILWAUKEE,WI 53211
[3] UNIV WISCONSIN,DEPT PHYS,MILWAUKEE,WI 53211
基金
美国国家科学基金会;
关键词
chemisorption; nickel; photoelectron diffraction; soft X-ray photoelectron spectroscopy; sulfur;
D O I
10.1016/S0039-6028(97)00044-7
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The angle-resolved X-ray photoelectron spectra for 0.15 monolayers (ML) of sulfur, and 0.25 ML methyl thiolate formed at 100 K and annealed to 150 and 250 K, on Ni(lll) are analyzed to determine the structures of these species. It is found that sulfur adsorbs on the face-centered cubic hollow site on Ni(111) with a S-Ni bond length of 2.20 +/- 0.02 Angstrom. The thiolate species formed at 150 K has the C-S bond tilted at similar to 35 degrees to the surface normal with a C-S bond length of 1.85 +/- 0.02. Angstrom and a S-Ni bond length similar to that for adsorbed sulfur (2.2 Angstrom). The methyl group is tilted toward the bridge site and the thiolate appears to be adsorbed on the face-centered cubic site although there may also be adsorption in the hexagonal close packed site. The species formed at 250 K adsorbs on a reconstructed surface where the chemical shift of the S 2p core level indicates that it adsorbs at a four-fold site and the angle-resolved XPS data indicate that the C-S bond is oriented normal to the surface. The calculated angular variations in intensity are consistent with this interpretation but cannot distinguish between the various models proposed for the reconstructed surface. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:468 / 480
页数:13
相关论文
共 33 条
[1]   THE MECHANISM OF THE DECOMPOSITION OF METHANETHIOL ON FE(100) [J].
ALBERT, MR ;
LU, JP ;
BERNASEK, SL ;
CAMERON, SD ;
GLAND, JL .
SURFACE SCIENCE, 1988, 206 (03) :348-364
[2]   ORGANOSULFUR CHEMISTRY ON W(211) SURFACES .1. A COMPARISON OF METHANETHIOL AND METHANOL [J].
BENZIGER, JB ;
PRESTON, RE .
JOURNAL OF PHYSICAL CHEMISTRY, 1985, 89 (23) :5002-5010
[3]   DECOMPOSITION OF METHANETHIOL ON NI(111) - A TPD AND SSIMS STUDY [J].
CASTRO, ME ;
WHITE, JM .
SURFACE SCIENCE, 1991, 257 (1-3) :22-32
[4]  
CASTRO ME, 1991, LANGMUIR, V7, P216
[5]   CRYSTALLOGRAPHIC DEPENDENCE OF CHEMISORPTION BONDING FOR SULFUR ON (001), (110), AND (111) NICKEL [J].
DEMUTH, JE ;
JEPSEN, DW ;
MARCUS, PM .
PHYSICAL REVIEW LETTERS, 1974, 32 (21) :1182-1185
[6]   SURFACE STRUCTURES FORMED DURING INTERACTION OF SULPHUR COMPOUNDS WITH (111) FACE OF NICKEL [J].
EDMONDS, T ;
MCCARROLL, JJ ;
PITKETHLY, RC .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY, 1971, 8 (01) :68-+
[7]   DETERMINATION OF THE GEOMETRY OF SULFUR ON NICKEL SURFACES BY LOW-ENERGY ION-SCATTERING [J].
FAUSTER, T ;
DURR, H ;
HARTWIG, D .
SURFACE SCIENCE, 1986, 178 (1-3) :657-666
[8]  
FERNANDEZ A, 1995, J PHYS CONDENS MATT, V40, P7781
[9]   SULFUR CHEMISORPTION ON NI(111) - THE CLOCK STRUCTURE OF THE (5-ROOT-3X2)S PHASE [J].
FOSS, M ;
FEIDENHANSL, R ;
NIELSEN, M ;
FINDEISEN, E ;
JOHNSON, RL ;
BUSLAPS, T ;
STENSGAARD, I ;
BESENBACHER, F .
PHYSICAL REVIEW B, 1994, 50 (12) :8950-8953
[10]   ADSORBATE-INDUCED SURFACE STRESS AND SURFACE RECONSTRUCTION - OXYGEN, SULFUR AND CARBON ON NI(111) [J].
GROSSMANN, A ;
ERLEY, W ;
IBACH, H .
SURFACE SCIENCE, 1995, 337 (03) :183-189