Coadsorption of CO and C6H6 on Co(0001)

被引：4
|
作者：
Habermehl-Cwirzen, K
Lahtinen, J
Hautojärvi, P
机构：
[1] Aalto Univ, Phys Lab, FIN-02150 Espoo, Finland
[2] Tech Univ Darmstadt, Dept Mat Sci, D-64287 Darmstadt, Germany
来源：
SURFACE SCIENCE | 2005年 / 584卷 / 01期
关键词：
aromatics; carbon monoxide; catalysis; cobaft; low energy electron diffraction (LEED); low index single crystal surfaces; thermal desorption spectroscopy; X-ray photoelectron spectroscopy;
D O I：
10.1016/j.susc.2004.12.035
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：
We have studied the influence of CO on the adsorption of benzene on the Co(0001) surface using LEED, XPS, TDS and work function measurements. CO was found to reduce the benzene adsorption, but even at saturation CO exposure no complete blocking was observed. Thermal desorption of the coadsorbed layer featured CO and II2 peaks indicating partial dehydrogenation of benzene and retaining of the CO bond. Ordered LEED structures were found with all coverages: Pre-adsorption of CO led to patterns already seen for pure carbon monoxide adsorption, Pre-adsorption of benzene showed the known (root 7 x root 7) R19 structure of pure benzene also with small CO exposures, but higher CO exposures yielded a mixture of (root 7 x root 7) R19 and (root 3 x root 3)R30 patterns. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：70 / 76
页数：7
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