Aging performances of Ti based IrO2+Ta2O5 anodes in sulfuric acid during electrolysis

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	Aging performances of Ti based IrO2+Ta2O5 anodes in sulfuric acid during electrolysis
	J. M. Hu; H. M. Meng; J. Q. Zhang; C. N. Cao
	2002
发表期刊	Acta Physico-Chimica Sinica
ISSN	1000-6818
卷号	18 期号:1 页码:14-20
摘要	Physico-chemical and electrochemical performances of long service life Ti/70% IrO2-30% Ta2O5 (mole fraction) anodes prepared at 450 degreesC have been investigated over the whole electrolysis time in H2SO4 solution. The results showed that the whole electrolysis process of this anode could be divided into three Stages consisting of 'active', 'stable' and 'de-active' ones. In the first two stages, the dissolution of coated oxides was dominated (with preferential loss of IrO2 component). It was found that, in these two stages, the preferential orientations of (110) and (101) planes in IrO2 rutile decreased with the electrolysis time, and that of (002) plane increased, while the preferential orientations remained to be stabilized in the 'de-active' region. This indicated that the loss mechanism of the catalyst coatings was changed. Electrochemical impedance spectroscopy (EIS) measurements showed a slight increase in oxygen evolution reaction resistance of the oxide catalysts while a sharp rise in totally physical impedance of the whole anode in the 'de-active' region. X-ray diffraction analysis (XRD) showed that the intensity of TiO2 rutile reflections increased with the electrolysis time, with a sharp increasing in 4 de-active' region. According to the experimental results the degradation mechanism for long service life Ti based coating anodes has been proposed.
部门归属	zhejiang univ, dept chem, hangzhou 310027, peoples r china. univ sci & technol beijing, ctr corros & protect, beijing 100083, peoples r china. chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;cao, cn (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china
关键词	Degradation Mechanism Titanium Anodes Iro2 Ta2o5 Oxygen-evolving Electrodes Long Service Life Surface Choice Films
URL	查看原文
WOS记录号	WOS:000173367900004
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36292
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. M. Hu,H. M. Meng,J. Q. Zhang,et al. Aging performances of Ti based IrO2+Ta2O5 anodes in sulfuric acid during electrolysis[J]. Acta Physico-Chimica Sinica,2002,18(1):14-20.
APA	J. M. Hu,H. M. Meng,J. Q. Zhang,&C. N. Cao.(2002).Aging performances of Ti based IrO2+Ta2O5 anodes in sulfuric acid during electrolysis.Acta Physico-Chimica Sinica,18(1),14-20.
MLA	J. M. Hu,et al."Aging performances of Ti based IrO2+Ta2O5 anodes in sulfuric acid during electrolysis".Acta Physico-Chimica Sinica 18.1(2002):14-20.