Electrochemical measurement of the oxygen diffusivity and solubility in concentrated alkaline media on rotating ring-disk and disk electrodes - application to industrial chlorine-soda electrolyte

被引：29

作者：

Chatenet, M ^{[1
]}

Aurousseau, M ^{[1
]}

Durand, R ^{[1
]}

机构：

[1] Ecole Natl Super Electrochim & Electrome Grenoble, Inst Natl Polytech Grenoble, Lab Electrochim & Physico Chim & Interfaces, F-38402 St Martin Dheres, France

来源：

ELECTROCHIMICA ACTA | 2000年 / 45卷 / 17期

关键词：

oxygen diffusivity; oxygen solubility; concentrated NaOH; RRDE; temperature and concentration effect;

D O I：

10.1016/S0013-4686(00)00325-X

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The measurement of oxygen transit time from the disk to the ring of a rotating ring-disk electrode has been used for the oxygen diffusivity determination. The oxygen solubility has then been deduced from the limiting current measure in quasi-steady state oxygen reduction voltammetry. The method validation has been done for a 1 M NaOH solution at 25 degrees C. Its use in the case of industrial electrolytes, 11.1 M (33 wt.%) NaOH at 25 and 80 degrees C for which no literature data are available, has then been undertaken; the oxygen solubility is 72 times smaller than in 1 hi soda at 25 degrees C. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：2823 / 2827

页数：5

共 10 条

[1] RADIAL TRANSPORT TIMES AT ROTATING RING-DISK ELECTRODES . LIMITATIONS ON DETECTION OF ELECTRODE INTERMEDIATES UNDERGOING HOMOGENEOUS CHEMICAL REACTIONS [J].