REDOX REACTIONS OF HYDROSULFIDE IONS ON THE PLATINUM-ELECTRODE .1. THE PRESENCE OF INTERMEDIATE POLYSULFIDE IONS AND SULFUR LAYERS

被引：33

作者：

SZYNKARCZUK, J ^{[1
]}

KOMOROWSKI, PG ^{[1
]}

DONINI, JC ^{[1
]}

机构：

[1] CANADA CTR MINERAL & ENERGY TECHNOL,WESTERN RES CTR,DEVON T0C 1E0,AB,CANADA

来源：

ELECTROCHIMICA ACTA | 1994年 / 39卷 / 15期

关键词：

HYDROSULFIDE IONS; SULFUR LAYER; POLYSULFIDE IONS; PLATINUM ELECTRODE;

D O I：

10.1016/0013-4686(94)EC075-I

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical and chemical reactions occurring at a platinum electrode immersed in an Na2S solution were investigated by cyclic voltammetry and controlled-potential electrolysis. It was found that the HS- ions were oxidized in two stages; the first one was the process of oxidizing the hydrosulphide ions into intermediate polysulphite ions, and the second was the further oxidization to elemental sulphur. The formation of a sulphur film significantly reduced the rate of electrolysis. The chemical dissolution of this film was found to mitigate the electrode blocking effect.

引用

页码：2285 / 2289

页数：5

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