Effect of pyrite on the electrochemical behavior of chalcopyrite at different potentials in pH 1.8 H2SO4 | |
Qingyou Liu; Shuai Wang; Miao Chen; Yi Yang | |
刊名 | Journal of Chemical Research
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2019 | |
卷号 | 43期号:11-12页码:493-502 |
关键词 | Chalcopyrite Electrochemical Electrochemical Impedance Spectroscopy Potentiodynamic Pyrite |
英文摘要 | Chalcopyrite is the most abundant, but also one of the most refractory, copper sources. One way to enhance chalcopyrite’s electrochemical dissolution is by mixing it with pyrite. To understand how and to what extent pyrite affects chalcopyrite’s electrochemical dissolution at different potentials, the electrochemical behaviors of chalcopyrite, pyrite, and chalcopyrite–pyrite couples in pH 1.8 H2SO4 were studied by potentiodynamic and electrochemical impedance spectroscopy. Potentiodynamic curves showed their different electrochemical reaction states and electrode surface characteristics. From open-circuit potential to 470 mV (vs saturated calomel electrode), chalcopyrite–pyrite was passivated with Cu1−xFe1−yS2 [Math Processing Error](y≫x); from 470 to 580 mV, trans-passive dissolution occurred, and in the passive region, Cu1−xFe1−yS2 transformed into Cu1−x−zS2; from 580 to 700 mV was an active region; and a pseudo-passive region was formed with CuS when the potential was above 700 mV. The smaller charge transfer resistance and passive resistance, as well as the smaller inductive relaxation, revealed how and to what extent the coupled pyrite accelerated the electrochemical dissolution of chalcopyrite. |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.gyig.ac.cn/handle/42920512-1/10816] ![]() |
专题 | 地球化学研究所_地球内部物质高温高压实验室 |
作者单位 | 1.CSIRO Mineral Resources Flagship, Clayton, VIC, Australia 2.University of Chinese Academy of Sciences, Beijing, China 3.Key Laboratory of High-Temperature and High-Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China |
推荐引用方式 GB/T 7714 | Qingyou Liu;Shuai Wang;Miao Chen;Yi Yang. Effect of pyrite on the electrochemical behavior of chalcopyrite at different potentials in pH 1.8 H2SO4[J]. Journal of Chemical Research,2019,43(11-12):493-502. |
APA | Qingyou Liu;Shuai Wang;Miao Chen;Yi Yang.(2019).Effect of pyrite on the electrochemical behavior of chalcopyrite at different potentials in pH 1.8 H2SO4.Journal of Chemical Research,43(11-12),493-502. |
MLA | Qingyou Liu;Shuai Wang;Miao Chen;Yi Yang."Effect of pyrite on the electrochemical behavior of chalcopyrite at different potentials in pH 1.8 H2SO4".Journal of Chemical Research 43.11-12(2019):493-502. |
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