Structure of disordered ethylene adsorbed on Pt(111) analyzed by diffuse LEED: Asymmetrical di-sigma bonding favored

被引：49
作者：
Doll, R
Gerken, CA
VanHove, MA
Somorjai, GA
机构：
[1] LAWRENCE LIVERMORE NATL LAB, DIV MAT SCI, LIVERMORE, CA 94550 USA
[2] UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA
来源：
SURFACE SCIENCE | 1997年 / 374卷 / 1-3期
关键词：
alkenes; electron-solid diffraction; low energy electron diffraction (LEED); low index single crystal surfaces; platinum; surface structure;
D O I：
10.1016/S0039-6028(96)01227-7
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 adsorption structure of ethylene on Pt(111) at 200 K is studied by means of diffuse low-energy electron diffraction (DLEED), analyzing diffuse intensity versus energy, DI(E), curves. The data favor a mixed occupation of two similar sites with the centers of the C-C bonds above both fee and hcp sites and very similar local structures. In each case, the best-fit adsorption geometry is asymmetrical between the two carbon atoms, the molecular axes likely being tilted with respect to the surface plane by about 22 degrees. Substrate relaxation is undetectable.
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收藏
页码：151 / 161
页数：11
相关论文
共 75 条
[1]   THE LOCAL GEOMETRY OF REACTANT AND PRODUCT IN A SURFACE-REACTION - THE DEHYDROGENATION OF ADSORBED ETHYLENE ON NI(III) [J].
BAO, S ;
HOFMANN, P ;
SCHINDLER, KM ;
FRITZSCHE, V ;
BRADSHAW, AM ;
WOODRUFF, DP ;
CASADO, C ;
ASENSIO, MC .
SURFACE SCIENCE, 1995, 323 (1-2) :19-29
[2]   FOLLOWING THE CHANGES IN LOCAL GEOMETRY ASSOCIATED WITH A SURFACE-REACTION - THE DEHYDROGENATION OF ADSORBED ETHYLENE [J].
BAO, S ;
HOFMANN, P ;
SCHINDLER, KM ;
FRITZSCHE, V ;
BRADSHAW, AM ;
WOODRUFF, DP ;
CASADO, C ;
ASENSIO, MC .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1994, 6 (06) :L93-L98
[3]   A TENSOR LEED STRUCTURAL STUDY OF THE COVERAGE-DEPENDENT BONDING OF IODINE ADSORBED ON RH(111) [J].
BARNES, CJ ;
WANDER, A ;
KING, DA .
SURFACE SCIENCE, 1993, 281 (1-2) :33-41
[4]   TEMPERATURE-PROGRAMMED DESORPTION STUDY OF ETHYLENE ON A CLEAN, A H-COVERED, AND AN O-COVERED PT(111) SURFACE [J].
BERLOWITZ, P ;
MEGIRIS, C ;
BUTT, JB ;
KUNG, HH .
LANGMUIR, 1985, 1 (02) :206-212
[5]   GEOMETRIC AND ELECTRONIC EFFECTS IN CHEMISORPTION AND REACTION OF ACETYLENE, ETHYLENE AND BENZENE ON NORMAL AND RECONSTRUCTED IRIDIUM (100)SURFACE [J].
BRODEN, G ;
RHODIN, T ;
CAPEHART, W .
SURFACE SCIENCE, 1976, 61 (01) :143-176
[6]   A METHOD FOR ESTIMATING SURFACE-REACTION ENERGETICS - APPLICATION TO THE MECHANISM OF ETHYLENE DECOMPOSITION ON PT(111) [J].
CARTER, EA ;
KOEL, BE .
SURFACE SCIENCE, 1990, 226 (03) :339-357
[7]   SEQUENTIAL ADSORPTION OF D2 AND C2H4 ON SINGLE-CRYSTAL PLANES OF TUNGSTEN [J].
CARTIER, PG ;
RYE, RR .
JOURNAL OF CHEMICAL PHYSICS, 1973, 59 (09) :4602-4611
[8]   AMOUNT AND ORIENTATION OF PI-BONDED ETHYLENE FORMED AT 95-K ON K/PT(111) SURFACES (AND O/PT(111) SURFACES) - A TDS, UPS, XPS, AND NEXAFS STUDY [J].
CASSUTO, A ;
MANE, M ;
JUPILLE, J ;
TOURILLON, G ;
PARENT, P .
JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (14) :5987-5993
[9]   THE EFFECT OF K, CS AND O ATOMS ON ETHYLENE ADSORPTION ON THE PT(111) SURFACE [J].
CASSUTO, A ;
MANE, M ;
HUGENSCHMIDT, M ;
DOLLE, P ;
JUPILLE, J .
SURFACE SCIENCE, 1990, 237 (1-3) :63-71
[10]   A SIMS STUDY OF THE DEHYDROGENATION OF ETHYLENE ON PT(111) [J].
CREIGHTON, JR ;
WHITE, JM .
SURFACE SCIENCE, 1983, 129 (2-3) :327-335
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