Inactivation of PbO2 anodes during oxygen evolution in sulfuric acid solution
文献类型：期刊论文
| 作者 | J. L. Cao ; Z. C. Wu ; H. Y. Li ; J. Q. Mang |
| 刊名 | Acta Physico-Chimica Sinica
 |
| 出版日期 | 2007 |
| 卷号 | 23期号:10页码:1515-1519 |
| 关键词 | inactivation PbO2 anode intrinsic stress electrode beta-pbo2 stresses |
| ISSN号 | 1000-6818 |
| 中文摘要 | 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. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/33435]  |
| 专题 | 金属研究所_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. |
入库方式： OAI收割
来源：金属研究所
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