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）
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 energydispersive 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.
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, 2014,31(5): 8-12
2014, Vol. 31 
