Infrared reflection absorption spectroscopy study of CO adsorption and reaction on oxidized Pd(100)

被引：14
|
作者：
Gao, Feng [1 ]
Lundwall, Matthew [1 ]
Goodman, D. Wayne [1 ]
机构：
[1] Texas A&M Univ, Dept Chem, College Stn, TX 77842 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 15期
关键词：
D O I：
10.1021/jp710713r
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, desorption, and reaction of CO on the (root 5x root 5)R27 degrees surface oxide on Pd(100) grown by two methods was investigated with infrared reflection absorption spectroscopy. CO multilayer desorbs at similar to 40 K, whereas monolayer desorption is complete at similar to 210 K. The surface oxide formed at 575 K with a 600 Langmuir (L) exposure of O-2 exhibits a stronger interaction with CO compared with a surface oxide formed at 575 K with a 4500 L O-2 exposure, presumably due to defects in the former. The surface oxide formed with a lower exposure of O-2 exhibits enhanced reactivity with CO at 400 K. Below 60 K, O-2 blocks CO adsorption on the monolayer oxide.
引用
收藏
页码：6057 / 6064
页数：8
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