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.

引用

页码：151 / 161

页数：11

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