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

被引：26
|
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
收藏
页码：222 / 228
页数：7
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