Low temperature infrared spectra of CO adsorbed on the surface of MgO(001) thin films

被引：27

作者：

Sterrer, M ^{[1
]}

Risse, T ^{[1
]}

Freund, HJ ^{[1
]}

机构：

[1] Max Planck Gesell, Fritz Haber Inst, Dept Phys Chem, D-14195 Berlin, Germany

来源：

SURFACE SCIENCE | 2005年 / 596卷 / 1-3期

基金：

奥地利科学基金会;

关键词：

magnesium oxide; thin films; CO adsorption; IR spectroscopy; TPD;

D O I：

10.1016/j.susc.2005.09.019

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：

Reflection-absorption infrared spectra of CO adsorbed on the surface of thin MgO(0 0 1) films are reported in the temperature range 30-90 K. The observed bands are identical with those reported earlier for MgO single crystals and powder samples. By selective population of low-coordinated (LC) sites and from the analysis of respective TPD spectra a desorption energy for LC sites of similar to 25 kJ mol(-1) was derived, in perfect agreement with recent findings on MgO powders. Experiments with (CO)-C-12/(CO)-C-13 give evidence for substantial infrared intensity transfer between neighboring CO oscillators and the formation of adsorbate complexes containing more than one CO molecule on low-coordinated sites. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：222 / 228

页数：7

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