ADSORPTION OF PYRAZINE ON AU(111) AND AG(111) - ON THE ROLE OF THE ELECTRONIC FACTOR

被引：11
|
作者：
LAZARESCU, V [1 ]
机构：
[1] UNIV ULM,DEPT ELECTROCHEM,D-89069 ULM,GERMANY
来源：
SURFACE SCIENCE | 1995年 / 335卷 / 1-3期
关键词：
AUGER ELECTRON SPECTROSCOPY; CHEMISORPTION; GOLD; LOW INDEX SINGLE CRYSTAL SURFACES; MODELS OF SURFACE CHEMICAL REACTIONS; PYRAZINE; SILVER; SOLID-LIQUID INTERFACES X-RAY PHOTOELECTRON SPECTROSCOPY;
D O I：
10.1016/0039-6028(95)00421-1
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：
XPS and AES investigations of the emersed Au(111) and Ag(111) electrodes have revealed that pyrazine is more weakly adsorbed on Ag than on Au. Whereas on Au, pyrazine is firmly bound on the surface and the increase in the positive charge of the electrode brings about the increase in the organic surface excess by changing the molecule orientation from a flat to a Vertical position being then involved in the subsequent anodic oxidation processes, its bond with silver is so weak that anions remove it easily from the surface. The different behavior of the two electrodes to the pyrazine adsorption has been explained in terms of electronic interactions.
引用
收藏
页码：227 / 234
页数：8
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