STRUCTURAL-ANALYSES OF CS+CO COADSORBED ON RU(0001)

被引：40

作者：

OVER, H

BLUDAU, H

KOSE, R

ERTL, G

机构：

[1] Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-14195 Berlin

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.51.4661

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Adsorption of CO onto a Ru(0001) surface precovered with Cs (coverage 0.25) leads to the formation of two distinct (2×2)-Cs-CO phases with one and two CO molecules in the unit cell. Structural analysis by means of low-energy electron diffraction reveals that the Cs atoms remain in on-top positions, while the CO molecules are located in threefold sites, contrary to the occupation of on-top sites if adsorbed alone. This effect of site switching is attributed to the enhanced electron density of the Ru substrate leading to more pronounced back donation in bonding the CO molecules. © 1995 The American Physical Society.

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页码：4661 / 4664

页数：4

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