OXIDATION OF ACETONITRILE-BASED ELECTROLYTE-SOLUTIONS AT HIGH POTENTIALS - AN IN-SITU FOURIER-TRANSFORM INFRARED-SPECTROSCOPY STUDY

被引：50

作者：

KRTIL, P ^{[1
]}

KAVAN, L ^{[1
]}

NOVAK, P ^{[1
]}

机构：

[1] PAUL SCHERRER INST,CH-5232 VILLIGEN PSI,SWITZERLAND

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1993年 / 140卷 / 12期

关键词：

D O I：

10.1149/1.2221100

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The oxidation of LiAsF6/acetonitrile and LiClO4/acetonitrile solutions containing 0.003-0.05M H2O was studied on platinum and glassy carbon electrodes by in situ Fourier transform infrared spectroscopy. Both the solvent and the solute are unstable at potentials positive to ca. 2.2 V vs. SCE. The main oxidation product is CO2. Other products detected are: acetamide (LiAsF6/acetonitrile), ClO2, and an unspecified ''nitrogen oxide'' (LiClO4/acetonitrile). Carbon dioxide is formed via a reaction of acetonitrile with trace water as substantiated by the occurrence of an isotopic shift of the CO2 stretching vibration when using (H2O)-O-18. The rate of the CO2 formation is increased by the presence of perchlorate anions and the Pt surface.

引用

页码：3390 / 3395

页数：6

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[1] INFRARED SPECTROELECTROCHEMISTRY [J].