Study of the electrochemical passive-active transition of chalcopyrite in acidic solution
文献类型：期刊论文
| 作者 | Liu, Qingyou1; Zheng, Kai1,2; Wen, Xiaoying1; Li, Heping1 |
| 刊名 | International journal of electrochemical science
 |
| 出版日期 | 2016-08-01 |
| 卷号 | 11期号:8页码:7089-7098 |
| 关键词 | Chalcopyrite Potentiodynamic curve Eis Electrochemical dissolution |
| ISSN号 | 1452-3981 |
| DOI | 10.20964/2016.08.05 |
| 通讯作者 | Li, heping(liheping123@yahoo.com) |
| 英文摘要 | The electrochemical behaviors of chalcopyrite in 1.0 m h2so4 were studied by potentiodynamic polarization. the experimental results revealed that chalcopyrite has four different potential ranges: passive for ocp up to 500 mv; trans-passive dissolution/passive from 500 mv to 780 mv; active from 780 mv to 900 mv; and pseudo-passive above 900 mv. when the electrolyte contained 3.0 g/l fe3+, the passive phenomenon weakened markedly, the trans-passive dissolution/passive range became narrower, the active potential sharply decreased, and the electrochemical promoting efficiency increased 34.86-fold. electrochemical impedance spectroscopy (eis) confirmed the potentiodynamic results, namely, that chalcopyrite is in a passive state at ocp and its charge transfer resistance r-sc and passive film resistance r-p are 816.5 and 18,722 omega.cm(2), respectively. at a potential of 800 mv, the chalcopyrite rsc decreased to 42.9 omega.cm(2), and an equivalent inductance occurred. passive film did not observed, which was also consistent with the electrode's active characterization. these results have direct implications for chalcopyrite hydrometallurgy. |
| WOS关键词 | SULFURIC-ACID ; MILD-STEEL ; DISSOLUTION ; KINETICS ; SURFACE ; MEDIA ; BEHAVIOR ; SYSTEMS |
| WOS研究方向 | Electrochemistry |
| WOS类目 | Electrochemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000384906500055 |
| 出版者 | ESG |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2374835 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Li, Heping |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Qingyou,Zheng, Kai,Wen, Xiaoying,et al. Study of the electrochemical passive-active transition of chalcopyrite in acidic solution[J]. International journal of electrochemical science,2016,11(8):7089-7098. |
| APA | Liu, Qingyou,Zheng, Kai,Wen, Xiaoying,&Li, Heping.(2016).Study of the electrochemical passive-active transition of chalcopyrite in acidic solution.International journal of electrochemical science,11(8),7089-7098. |
| MLA | Liu, Qingyou,et al."Study of the electrochemical passive-active transition of chalcopyrite in acidic solution".International journal of electrochemical science 11.8(2016):7089-7098. |
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来源：中国科学院大学
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