ADSORPTION OF THIOCYANATE ON POLYCRYSTALLINE SILVER AND GOLD ELECTRODES STUDIED IN-SITU BY SUM-FREQUENCY SPECTROSCOPY

被引：40

作者：

ONG, TH

DAVIES, PB

BAIN, CD

机构：

[1] UNIV CAMBRIDGE,CHEM LABS,CAMBRIDGE CB2 1EW,ENGLAND

[2] PHYS CHEM LAB,OXFORD OX1 3QZ,ENGLAND

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 46期

关键词：

D O I：

10.1021/j100148a034

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：

In situ vibrational spectra of thiocyanate ions adsorbed on smooth silver and gold electrodes have been obtained by infrared-visible sum-frequency spectroscopy (SFS). SCN- was detected on silver in the potential range 0.0 to -0.3 V vs SCE and on gold in the potential range +0.4 to -0.4 V vs SCE. In both cases, a peak due to the C-N stretching mode of S-bound thiocyanate was observed. This peak moved to lower frequencies as the potential was made more negative. There was no evidence for N-bound species. The absence of peaks at large negative potentials is consistent with SCN- ions lying parallel to the surface.

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页码：12047 / 12050

页数：4

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