Comparative vibrational study on alkali coadsorption with CO and O on Ni(111) and Cu(111)

被引：7
|
作者：
Politano, A. [1 ]
Formoso, V. [1 ,2 ,3 ]
Chiarello, G. [1 ,4 ]
机构：
[1] Univ Calabria, Dipartimento Fis Rende Cs, I-87030 Commenda Di Rende, Italy
[2] Laboratorio Regionale LICRYL, I-87036 Arcavacata Di Rende, Cs, Italy
[3] CNR Corso Perrone, INFM, I-16152 Genoa, Italy
[4] Consorzio Interuniv Sci Fis Mat, CNISM, I-00146 Rome, Italy
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 26期
关键词：
DENSITY-FUNCTIONAL THEORY; ETHYLENE EPOXIDATION; SUBSURFACE OXYGEN; ADSORBATE INTERACTIONS; ADSORPTION DYNAMICS; CATALYTIC PROMOTION; CARBON-MONOXIDE; LONG-RANGE; POTASSIUM; SURFACE;
D O I：
10.1088/0953-8984/21/26/264006
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
High-resolution electron energy loss spectroscopy was used to investigate alkali (Na, K) coadsorption with CO and O on Cu(111) and Ni(111). Measurements provided new insights in these systems. A CO-induced weakening of the alkali-substrate bond was revealed on both substrates. The effect is more pronounced for the Na + CO/Ni(111) system. Submonolayers of alkalis were found to promote the preferential population of the subsurface site for O/Cu(111) but not for O/Ni(111).
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页数：7
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