ADSORPTION OF CARBON-MONOXIDE ON IR(110) INVESTIGATED BY INFRARED REFLECTION-ABSORPTION SPECTROSCOPY

被引：30

作者：

LYONS, KJ ^{[1
]}

XIE, J ^{[1
]}

MITCHELL, WJ ^{[1
]}

WEINBERG, WH ^{[1
]}

机构：

[1] UNIV CALIF SANTA BARBARA,DEPT CHEM ENGN,SANTA BARBARA,CA 93106

来源：

SURFACE SCIENCE | 1995年 / 325卷 / 1-2期

关键词：

CARBON MONOXIDE; INFRARED ABSORPTION SPECTROSCOPY; IRIDIUM; LOW INDEX SINGLE CRYSTAL SURFACES; THERMAL DESORPTION SPECTROSCOPY; VIBRATIONS OF ADSORBED MOLECULES;

D O I：

10.1016/0039-6028(94)00729-2

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 of carbon monoxide on the Ir(110) surface at 300 K has been investigated with Fourier transform infrared reflection-absorption spectroscopy. A single band was observed that shifted up from a low-coverage value of 2001 cm(-1) to a saturation-coverage limit of 2086 cm(-1). This band is attributed to the carbon-oxygen stretching mode of a molecule adsorbed on top of a surface iridium atom. This frequency shift was separated into a contribution due to dipole-dipole interactions and a smaller contribution from chemical effects (d-electron competition) by using isotopic substitution. Employing knowledge of the structure of the reconstructed Ir(110) surface and temperature-programmed desorption spectra measured at various coverages, an adlayer model is proposed to reconcile a single adsorption site with the temperature-programmed desorption data.

引用

页码：85 / 92

页数：8

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