PHOTODESORPTION OF CO AND CO+ FROM PT(111) - MECHANISM AND SITE-SPECIFICITY

被引：35
|
作者：
FUKUTANI, K
SONG, MB
MURATA, Y
机构：
[1] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN
[2] RES DEV CORP JAPAN,PRESTO,TOKYO,JAPAN
来源：
JOURNAL OF CHEMICAL PHYSICS | 1995年 / 103卷 / 06期
关键词：
D O I：
10.1063/1.469697
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：
Ultraviolet photodesorption of CO and CO+ from Pt(111) at 80 K is investigated by (2+1) resonance-enhanced multiphoton ionization and reflection absorption infrared spectroscopy. Desorption of CO and CO+ occurs at the on-top site as single-photon and three-photon processes, respectively. The rotational, vibrational, and translational temperatures of desorbed CO are approximately 130, 3700, and 2000 K, which are considerably higher than the sample temperature. The threshold energy of neutral CO desorption lies between 2.3 and 3.5 eV suggesting that an unoccupied 2 pi state is responsible for the desorption. (C) 1995 American Institute of Physics.
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页码：2221 / 2228
页数：8
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