IN-SITU AND EX-SITU IRAS, LEED AND EC-STM STUDIES OF UNDERPOTENTIALLY DEPOSITED COPPER ON A PT(111) ELECTRODE IN SULFURIC-ACID-SOLUTION - COADSORPTION OF SULFATE ION WITH COPPER

被引：54

作者：

SHINGAYA, Y ^{[1
]}

MATSUMOTO, H ^{[1
]}

OGASAWARA, H ^{[1
]}

ITO, M ^{[1
]}

机构：

[1] KEIO UNIV,FAC SCI & TECHNOL,DEPT CHEM,KOHOKU KU,YOKOHAMA,KANAGAWA 223,JAPAN

来源：

SURFACE SCIENCE | 1995年 / 335卷 / 1-3期

关键词：

LOW INDEX SINGLE CRYSTAL SURFACES; METAL-ELECTROLYTE INTERFACES; REFLECTION SPECTROSCOPY; SCANNING TUNNELING MICROSCOPY; SOLID-LIQUID INTERFACES; VIBRATIONS OF ADSORBED MOLECULES;

D O I：

10.1016/0039-6028(95)00406-8

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：

The electrodeposition of copper on a Pt(111) electrode in sulfuric acid solution was studied by means of voltammetry, in situ and ex situ infrared reflection absorption spectroscopy, in situ electrochemical scanning tunneling microscopy and low energy electron diffraction. At potentials more positive than 0.75 V, LEED and in situ scanning tunneling microscope images showed a (root 3 X root 3)-R30 degrees structure of bisulfate anions on Pt(111). At the wide potential regions more negative than 0.5 V, images of the (2/1 (1)(2)) structure were observed from in situ STM and ascribed to a top-layer structure of sulfate anions on UPD copper on Pt(111). Between these potentials where underpotential deposition of copper or copper stripping occurred, the sulfate anion was coadsorbed with a copper ion on a Pt(111) electrode in the (root 3 X root 3)-R30 degrees structure.

引用

页码：23 / 31

页数：9

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