Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (10): 1553-1559.doi: 10.3866/PKU.WHXB20071012

• ARTICLE • Previous Articles     Next Articles

Effect of SbOx+SnO2 Intermediate Layer on the Properties of Ti-based MnO2 Anode

SHI Yan-Hua; MENG Hui-Min; SUN Dong-Bai; NI Yong-Le; CHEN Dong   

  1. Corrosion and Protection Center, Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China; Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, Beijing 100083, P. R. China
  • Received:2007-03-21 Revised:2007-06-05 Published:2007-10-01
  • Contact: MENG Hui-Min E-mail:siyanhua@yahoo.com.cn, menghm16@126.com

Abstract: SbOx+SnO2 were prepared by thermal decomposition as intermediate layer of Ti based MnO2 anode. Service lives of the anodes with or without SbOx +SnO2 intermediate layer in 0.5 mol·L -1 H2SO4 solution were investigated by using accelerated electrolysis. Polarization curves and cyclic voltammetric curves (CVs) were utilized to analyze Cl2 evolution reaction (CER) of the oxide electrodes. Cyclic voltammetric curves and electrochemical impedance spectroscopy (EIS) were utilized with the aim of obtaining detailed information related to the changes of the inner structure during the electrolysis. The results indicated that the main reason for the deactivation of MnO2 anodes was the passivation derived from the increase of the thickness of the insulating TiO2 layer. With the introduction of intermediate layer, the resistance between Ti base and active coating was lowered and the increase of resistance during the electrolysis was postponed dramatically, so the service lives were improved remarkably.

Key words: Intermediate layer, Manganese dioxide, Accelerated life, EIS

MSC2000: 

  • O643