Adsorption of CO on bimetallic RhN/Ru(0001) layers

被引：4
|
作者：
Thussing, Sebastian
Gazdzicki, Pawel
Jakob, Peter [1 ]
机构：
[1] Univ Marburg, Fachbereich Phys, D-35032 Marburg, Germany
来源：
SURFACE SCIENCE | 2014年 / 623卷
关键词：
Carbon monoxide; Infrared absorption spectroscopy; Ruthenium; Rhodium; Vibrations of adsorbed molecules; Low energy electron diffraction; PTXRU1-X/RU(0001) SURFACE ALLOYS; HIGH-RESOLUTION; LATERAL INTERACTIONS; THERMAL-DESORPTION; CARBON-MONOXIDE; METAL-SURFACES; VIBRATIONAL SPECTROSCOPY; PT/RU(0001) SURFACES; RU(0001) SURFACE; FUEL-CELLS;
D O I：
10.1016/j.susc.2014.01.002
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 of CO on bimetallic Rh-N/Ru(0001) layers with N = 0-5 Rh layers has been investigated using Fourier transform infrared spectroscopy, thermal desorption, and low energy electron diffraction. It is found that the morphology as well as the thickness of these ultra thin Rh films lead to characteristic frequency shifts of the internal CO stretch modes as well as variations of the CO desorption energies. For N >= 3 ML differences with respect to CO adsorption on Rh(111) single crystal substrates are only very minor. Our findings confirm similar observations and conclusions associated with CO on bimetallic Pt-N/Ru(0001) layers. Dependent on the coverage of CO adsorbed on Rh/Ru(0001) monolayer films we identify a series of ordered overlayer structures which have been correlated with characteristic CO vibrational spectra. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：29 / 40
页数：12
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