Vibrational dynamics of CO at single-crystal platinum electrodes in aqueous and non-aqueous electrolytes

被引：25

作者：

Peremans, A

Tadjeddine, A

Zheng, WQ

LeRille, A

GuyotSionnest, P

Thiry, PA

机构：

[1] FAC UNIV NOTRE DAME PAIX,INST STUDIES INTERFACE SCI,B-5000 NAMUR,BELGIUM

[2] UNIV CHICAGO,JAMES FRANCK INST,CHICAGO,IL 60637

来源：

SURFACE SCIENCE | 1996年 / 368卷

基金：

美国国家科学基金会;

关键词：

carbon monoxide; electrochemical methods; platinum; single crystal surfaces; sum frequency generation; vibrations of adsorbed molecules;

D O I：

10.1016/S0039-6028(96)01080-1

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：

The vibrational dynamics of CO at two electrochemical interfaces is studied as a function of the electrode potential, for CO/Pt(100) in 0.1M aqueous H2SO4 and CO/Pt(110) in 0.05M C16H36ClNO4 acetonitrile electrolyte. The measured lifetime of similar to 1.7 ps is in line with those previously determined for dry CO-metal interfaces. The lifetime appears to be independent of the electrolyte composition, and unaffected by an electrode-potential variation as large as 2 V achieved for the non-aqueous electrolyte experiment. These measurements suggest that the 2 pi* CO acceptor orbital involved in the substrate/adsorbate charge transfer process is much broader than 0.8 eV.

引用

页码：384 / 388

页数：5

共 15 条

[11] Vibrational dynamics of CO at the (100) platinum electrochemical interface [J].