The Mechanism of Activity Loss of RuO_2-TiO_2 Anode in Saturated NaCl Solution

Shen Manli; Chen Yanxi; Ke Li and Hong Rong(Tianjin University; Tianjin)

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The Mechanism of Activity Loss of RuO_2-TiO_2 Anode in Saturated NaCl Solution

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- The Mechanism of Activity Loss of RuO_2-TiO_2 Anode in Saturated NaCl Solution
- CIESC Journal Issue 3, (1990)
- 作者机构：
  
  天津大学,天津大学,天津大学,天津大学 ,天津,天津,天津,天津
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 June 1990，
  
  Published：25 June 1990
- 稿件说明：
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Shen Manli, Chen Yanxi, Ke Li and Hong Rong(Tianjin University, et al. The Mechanism of Activity Loss of RuO_2-TiO_2 Anode in Saturated NaCl Solution[J]. CIESC Journal, 1990, (3).
DOI：

Shen Manli, Chen Yanxi, Ke Li and Hong Rong(Tianjin University, et al. The Mechanism of Activity Loss of RuO_2-TiO_2 Anode in Saturated NaCl Solution[J]. CIESC Journal, 1990, (3). DOI：

摘要

采用电化学方法和表面物理方法研究了饱和NaCl溶液中RuO_2-TiO_2阳极(DSA)失去活性的机理.在不同的电解阶段所进行的研究表明:DSA电极的失活是一渐变过程.在此过程中

电极的RuO_2-TiO_2涂层的组成与结构不断变化.而组分Ru的溶解则是导致电极失效的主要原因.研究还表明:Ti组份溶解产生的水化物覆盖在阳极表面以及涂层的裂纹腐蚀也加速了电极的失效.研究中未发现明显的结果足以证实DSA电极发生了钝化.

Abstract

The mechanism of activity loss oi RuO2-TiO2 anode (DSA) in saturated NaCl solution was studied in terms of electrochemistry and surface physics. The information obtained in different periods of electrolysis showed that the loss of the activity of the DSA took place gradually. The contents and the structure of the RuO2-TiO2 containing layer changed continuously and the dissolution of the Ru component was main reason for the degradation of the DSA. The titanium hydroxide precipitated on the electrode surface also accelerates the loss of activity oi the DSA. The cracking corrosion in the coating layer was another reason for the activity loss. No obvious evidence was found to prove the happening of passivation of the DSA.

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