CHARACTERIZATION OF DSA-TYPE OXYGEN EVOLVING ELECTRODES - CHOICE OF BASE-METAL

被引：127

作者：

VERCESI, GP

ROLEWICZ, J

COMNINELLIS, C

HINDEN, J

机构：

[1] SWISS FED INST TECHNOL,INST CHEM ENGN,CH-1015 LAUSANNE,SWITZERLAND

[2] ELTECH SYST CORP,GENEVA BRANCH,CH-1228 PLAN LES OUATES,SWITZERLAND

来源：

THERMOCHIMICA ACTA | 1991年 / 176卷

关键词：

D O I：

10.1016/0040-6031(91)80257-J

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In the search for a good DSA-type O2-evolving electrode, the influence of the base metal (titanium, tantalum, zirconium, niobium and some of their alloys) on the performance of IrO2-Ta2O5 coated electrodes, was investigated. The thermal behaviour and oxygen affinity sequence of the metals, in relation to the electrode preparation procedure, were determined thermogravimetrically. The chemical and electrochemical stability of the base metal was found to be directly related, through the wear mechanism, to the service life of the electrode, measured in 30%H2SO4 at 80-degrees-C and 750 mA cm-2. Tantalum-based electrodes were shown to have the highest service life; 1700 h, compared with the 120 h for titanium-based electrodes.

引用

页码：31 / 47

页数：17

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