FT-IRAS STUDIES OF CO ADSORBED ON AG/PT(111) - ANOMALOUS BEHAVIOR OF VIBRATIONAL CROSS-SECTIONS

被引：40

作者：

RODRIGUEZ, JA ^{[1
]}

TRUONG, CM ^{[1
]}

GOODMAN, DW ^{[1
]}

机构：

[1] TEXAS A&M UNIV SYST,DEPT CHEM,COLLEGE STN,TX 77843

来源：

SURFACE SCIENCE | 1992年 / 271卷 / 1-2期

关键词：

D O I：

10.1016/0039-6028(92)90854-Y

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：

In CO/Ag/Pt(111) surfaces the interaction between Ag and Pt enhances the strength of the Ag-CO bond. The CO desorption temperature of one monolayer of silver supported on Pt(111) is approximately 70 K higher than that of Ag(111). Our results indicate that the infrared intensities of adsorbed CO are not representative of the relative composition of Pt(111) surfaces containing submonolayer coverages of silver. The Ag-bonded CO molecules screen CO molecules bonded to Pt, making them invisible in the infrared spectrum. The "screening" effect depends on the morphology and polarizability of the silver overlayer.

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页码：L331 / L337

页数：7

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