Extending surface Raman spectroscopic studies to transition metals for practical applications II. Hydrogen adsorption at platinum electrodes

被引：51

作者：

Ren, B ^{[1
]}

Xu, X ^{[1
]}

Li, XQ ^{[1
]}

Cai, WB ^{[1
]}

Tian, ZQ ^{[1
]}

机构：

[1] Xiamen Univ, Dept Chem, Inst Phys Chem, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China

来源：

SURFACE SCIENCE | 1999年 / 427-28卷

基金：

中国国家自然科学基金;

关键词：

chemisorption; electrochemical methods; hydrogen; metal-electrolyte interfaces; platinum; polycrystalline surfaces; Raman scattering spectroscopy;

D O I：

10.1016/S0039-6028(99)00257-5

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：

Hydrogen adsorption at platinum electrodes in acidic solution is investigated by confocal microprobe Raman spectroscopy. Vibrations for on-top adsorbed hydrogen against platinum surface at c. 2088 cm(-1) are observed in the overpotential deposition (OPD) region of hydrogen evolution. With the negative change in potential, there is a red shift of Pt-H vibrational frequency. In the underpotential deposition (UPD) region, only a very weak and broad band is discernible when the surface hydrogens are saturated. This indicates that the nature and the bonding configuration of the surface hydrogen are remarkably different in the UPD and OPD regions. Several factors, including the applied potential, hydrogen surface coverage, interactions with electrolyte ions and water molecules, are briefly discussed in terms of their influence on the observed spectroscopic properties. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：157 / 161

页数：5

共 22 条

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