SERS investigation of interfacial water at a silver electrode in acetonitrile solutions

被引:18
作者
Cao, PG
Gu, RA [1 ]
Qiu, LQ
Sun, R
Ren, B
Tian, ZQ
机构
[1] Suzhou Univ, Dept Chem, Suzhou 215006, Peoples R China
[2] Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
[3] Xiamen Univ, Inst Phys Chem, Xiamen 361005, Peoples R China
基金
中国国家自然科学基金;
关键词
Raman scattering spectroscopy; silver; water; chemisorption; ENHANCED RAMAN-SCATTERING; AG ELECTRODES; PLATINUM SURFACES; CARBON-MONOXIDE; DOUBLE-LAYER; SPECTROSCOPY; MOLECULES; IONS; H2O; REGION;
D O I
10.1016/S0039-6028(03)00543-0
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
Surface-enhanced Raman scattering from a silver electrode in solution of 0.1 M LiClO4 in acetonitrile has been analyzed as a function of applied potential. Three v(O-H) bands associated with the interfacial water and two v(O-H) bands associated with the OH- ion species were observed depending on the electrode potential. The band at 3487 cm(-1) is favored at relatively positive potentials and assigned to H2O molecules interacting with the electrode surface via the oxygen atoms. Another band at 3586 cm-1 appears in a wider potential region and is assigned to the H2O molecules with one or both of the hydrogen atoms facing the electrode surface. Additionally, evidence for the possible surface ion pair, (LiOH-)-O-divided by, which is closely associated with H2O molecules and the quasi-crystalline form of LiOH are also presented in this paper. (C) 2003 Published by Elsevier Science B.V.
引用
收藏
页码:217 / 225
页数:9
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