Sulfate adsorption on Cu(111) studied by in-situ IRRAS and STM: revealing the adsorption site and desorption behavior

被引：45

作者：

Lennartz, M ^{[1
]}

Broekmann, P ^{[1
]}

Arenz, M ^{[1
]}

Stuhlmann, C ^{[1
]}

Wandelt, K ^{[1
]}

机构：

[1] Univ Bonn, Inst Phys & Theoret Chem, D-53115 Bonn, Germany

来源：

SURFACE SCIENCE | 1999年 / 442卷 / 02期

关键词：

copper; infrared absorption spectroscopy; scanning tunneling microscopy; spectroelectrochemistry; sulfate;

D O I：

10.1016/S0039-6028(99)00918-8

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：

Sulfate adlayers on a copper(111) electrode were investigated by in-situ infrared reflection absorption spectroscopy (IRRAS) combined with in-situ scanning tunneling microscopy (STM). The latter data show clear evidence for a bridging bidendate coordination of sulfate to the copper surface. The IR spectra exhibit one single absorption band in the frequency range of 1205-1225 cm(-1). Further analysis of the band frequency and intensity with respect to the electrode potential leads to sulfate desorption with sulfate remaining in islands at the surface during the desorption process. This model is supported by additional STM measurements of the desorption behavior. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：215 / 222

页数：8

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