| Charge transfer across the water/nitrobenzene interface by three-electrode system |
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| 作者姓名： | 袁艺 高 |
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| 作者单位： | YUAN Yi GAO Zhao，ZHANG MeiqinZHANG Zhiquan & SHAO YuanhuaState Key Laboratory of Electroanalytical Chemistry，Changchun Institute of Applied Chemistry，Chinese Academy of Sciences，Changchun 130022，China |
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| 基金项目： | This work was supported by the Chinese Academy of Sciences (CAS), the National Natural Science Foundation of China (Grant No. 29825111)，the State Key Laboratory of Electroanalytical Chemistry of the CAS. |
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| 摘 要： | A droplet of aqueous solution containing a certain molar ratio of redox couple is first attached onto a platinum electrode surface, then the resulting drop electrode is immersed into the organic solution containing very hydrophobic electrolyte. Combined with reference and counter electrodes, a classical three-electrode system has been constructed. Ion transfer (IT) and electron transfer (ET) are investigated systematically using three-electrode voltammetry. Potassium ion transfer and electron transfer between potassium ferricyanide in the aqueous phase and ferrocene in nitrobenzene are observed with potassium ferricyanide/potassium ferrocyanide as the redox couple. Meanwhile, the transfer reactions of lithium, sodium, potassium, proton and ammonium ions are obtained with ferric sulfate/ferrous sulfate as the redox couple. The formal transfer potentials and the standard Gibbs transfer energy of these ions are evaluated and consistent with the results obtained by a four-electrode system and other methods.
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| 收稿时间： | 9 January 2006 |
Charge transfer across the water/nitrobenzene interface by three-electrode system |
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| Yi Yuan, Zhao Gao, Meiqin Zhang, Zhiquan Zhang and Yuanhua Shao.Charge transfer across the water/nitrobenzene interface by three-electrode system[J].Science in China(Chemistry),2002,45(5):494-502. |
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| Authors: | Yi Yuan Zhao Gao Meiqin Zhang Zhiquan Zhang and Yuanhua Shao |
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| Institution: | State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China |
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| Abstract: | A droplet of aqueous solution containing a certain molar ratio of redox couple is first attached onto a platinum electrode surface, then the resulting drop electrode is immersed into the organic solution containing very hydrophobic electrolyte. Combined with reference and counter electrodes, a classical three-electrode system has been constructed. Ion transfer (IT) and electron transfer (ET) are investigated systematically using three-electrode voltammetry. Potassium ion transfer and electron transfer between potassium ferricyanide in the aqueous phase and ferrocene in nitrobenzene are observed with potassium ferricyanide/potassium ferrocyanide as the redox couple. Meanwhile, the transfer reactions of lithium, sodium, potassium, proton and ammonium ions are obtained with ferric sulfate/ferrous sulfate as the redox couple. The formal transfer potentials and the standard Gibbs transfer energy of these ions are evaluated and consistent with the results obtained by a four-electrode system and other methods. |
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| Keywords: | water/nitrobenzene interface three-electrode system charge transfer |
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