Inactivation of PbO2 anodes during oxygen evolution in sulfuric acid solution

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	Inactivation of PbO2 anodes during oxygen evolution in sulfuric acid solution
	J. L. Cao; Z. C. Wu; H. Y. Li; J. Q. Mang
	2007
发表期刊	Acta Physico-Chimica Sinica
ISSN	1000-6818
卷号	23 期号:10 页码:1515-1519
摘要	Ti-substrate PbO2 (Ti/PbO2) anodes with Sb-doped SnO2 interlayer were prepared by thermal decomposition-electroplating technique. The behavior and mechanism of the inactivation of Ti/PbO2 anodes were studied by the accelerated life test, electrochemical impedance spectrum, XRD and SEM-EDX. The results showed that the inactivation of Ti/PbO2 anodes was a developing process. During oxygen evolution, partial active oxygen atoms produced as intermediate product diffuse toward Ti substrate, and they oxidize Pb3+ to Pb4+ in the PbO2 coating to occupy gradually the oxygen vacancies as free electron donors. This resulted in not only the decrease of conductivity but also a change of intrinsic stresses from tensile stresses to compressive stresses. When the process was finished on the whole, large numbers of active oxygen atoms began to diffuse to Ti substrate. The oxidation of Ti substrate led to the production of an interfacial stresses. Under the effects of compressive intrinsic stresses and interfacial stresses, PbO2 coating knobs out, subsequently flakes off and Ti/PbO2 anodes become inactive rapidly.
部门归属	zhejiang univ, dept environm engn, hangzhou 310027, peoples r china. tianjin univ, sch environm sci & engn, tianjin 300072, peoples r china. zhejiang univ, dept chem, hangzhou 310027, peoples r china. chinese acad sci, inst mat res, state key lab corros & protect met, shenyang 110016, peoples r china.;cao, jl (reprint author), zhejiang univ, dept environm engn, hangzhou 310027, peoples r china;shjzhcaojl@163.com wuzc@zju.edu.cn
关键词	Inactivation Pbo2 Anode Intrinsic Stress Electrode Beta-pbo2 Stresses
URL	查看原文
WOS记录号	WOS:000250412100006
引用统计	被引频次：11[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/321006/33435
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. L. Cao,Z. C. Wu,H. Y. Li,et al. Inactivation of PbO2 anodes during oxygen evolution in sulfuric acid solution[J]. Acta Physico-Chimica Sinica,2007,23(10):1515-1519.
APA	J. L. Cao,Z. C. Wu,H. Y. Li,&J. Q. Mang.(2007).Inactivation of PbO2 anodes during oxygen evolution in sulfuric acid solution.Acta Physico-Chimica Sinica,23(10),1515-1519.
MLA	J. L. Cao,et al."Inactivation of PbO2 anodes during oxygen evolution in sulfuric acid solution".Acta Physico-Chimica Sinica 23.10(2007):1515-1519.