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Chemcial Industry and Engineering 2014, Vol. 31 Issue (5) :8-12    DOI: doi: 10.13353/j.issn.1004.9533.2014.05.002
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A Study on Deactivation Behavior of IrO2-SiO2 Coated Titanium Anodes
SUN  Meng-Meng, WANG  Qing-Fa, ZOU  Ji-Jun, ZHANG  Xiang-Wen
(Key laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072,China)

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Abstract The deactivation behavior of 60%IrO2-40%SiO2coated titanium anodes prepared at different calcination temperature was studied during an accelerated life test (ALT) at 2 A·cm-2 in 1 mol·L-1 H2SO4 solution using cyclic voltammetry (CV), scanning electron microscopy (SEM) and energydispersive X -ray analysis (EDX). The changes of electrochemical characteristics before and after ALT were monitored. The surface morphology and composition of the oxide anode were analyzed. The main reason for the deactivation of anode is the formation of TiO2 layer between Ti base and the active coating. During an ALT, the dissolution of the active components and the mechanical loss of the low temperature calcinated anodes promote the formation of TiO2. However, some TiO2 have been generated during preparation of anodes at high calcination temperature, which accelerates the deactivation of the anodes. The IrO2-SiO2 coated titanium anodes prepared at 600℃ have the longest accelerated lifetime.
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Articles by authors
SUN Meng-Meng
WANG Qing-Fa
ZOU Ji-Jun
ZHANG Xiang-Wen
Keywordstitanium anodes;   deactivation;   electrolysis;   calcination temperature;   iridium oxide (IrO2);   silicon oxide (SiO2)     
Received 2013-03-27;
Fund:

国家青年科学基金(21203137)。

Corresponding Authors: 王庆法,电话:(022)27892340,E-mail:qfwang@tju.edu.cn。     Email: qfwang@tju.edu.cn
About author: 孙猛猛(1987-),男,硕士研究生。
Cite this article:   
SUN Meng-Meng, WANG Qing-Fa, ZOU Ji-Jun, ZHANG Xiang-Wen. A Study on Deactivation Behavior of IrO2-SiO2 Coated Titanium Anodes[J]  Chemcial Industry and Engineering, 2014,V31(5): 8-12
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