OXIDATION OF THIOSULFATE TO SULFATE AT GLASSY-CARBON ELECTRODES

被引：24

作者：

FENG, JR

JOHNSON, DC

LOWERY, SN

机构：

[1] IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011

[2] EASTMAN KODAK CO,CORP HLTH & ENVIRONM LABS,ENVIRONM SCI SECT,ROCHESTER,NY 14650

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1995年 / 142卷 / 08期

关键词：

D O I：

10.1149/1.2050063

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Thiosulfate (S2O32-) can be quantitatively oxidized to sulfate (SO42-) without production of elemental sulfur (S-o) by a two-step anodic process at glassy carbon electrodes in 1.0M NaOAc/1.0M HOAc buffer (pH 5). The first step, at 1.0 V vs. SCE, converts S2O32- to tetrathionate (S4O62-). The second step, at 1.6 V vs. SCE, converts S4O62- to S4O2-. Addition of bromide (Br-) to S2O32- solutions expedites the desired conversion, presumably because of homogeneous oxidations by bromine (Br-2) generated by anodic oxidation of Br-.

引用

页码：2618 / 2620

页数：3

共 5 条

[1]

BARD AJ, 1985, STANDARD POTENTIALS, P101

[2] ANODIC OXIDATIONS OF SULFITE, THIOSULFATE, AND DITHIONITE AT DOPED PBO2-FILM ELECTRODES [J].