| Electrochemical behavior of cerium（IV） in a RTIL and its mixture with ethanol |
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| 作者姓名： | Arijit Sengupta M.S. Murali P.K. Mohapatra |
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| 作者单位： | Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, India |
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| 基金项目： | Project supported by Bhabha Atomic Research Centre, Mumbai, India |
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| 摘 要： | A systematic study was carried out to explore the electrochemical behavior of Ce in room temperature ionic liquid（CnmimBr, where n=6, 8, 10） and mixture of C6 mimBr and ethanol by cyclic voltammetry. With increase in the number of carbon atoms on the alkyl substituent on methyl imidazolium cation, the electrochemical window of the ionic liquids was found to extend towards more negative potential value, as a result there was a possibility of reduction of Ce to lower oxidation states. The diffusion coefficient and activation energy for the diffusion were calculated in all the ionic liquids and one of their mixtures with ethanol. With increase in n value, the diffusion coefficient of Ce decreased due to increase in viscosity of the medium while the activation energy for the diffusion followed a reverse trend for C6 mimBr, C8 mimBr and C10 mimBr, respectively. The observations indicated that the nature of species of Ce might be different in room temperature ionic liquids（RTILs） from that present in their mixtures with ethanol.
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| 关 键 词： | 室温离子液体 电化学行为 混合物 乙醇 铈 扩散系数 电化学窗口 循环伏安 |
| 收稿时间： | 6 December 2013 |
Electrochemical behavior of cerium（IV） in a RTIL and its mixture with ethanol |
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| Arijit Sengupta M.S. Murali P.K. Mohapatra.Electrochemical behavior of cerium（IV） in a RTIL and its mixture with ethanol[J].Journal of Rare Earths,2014,32(7):641-647. |
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| Authors: | 《Journal of Rare Earths》 |
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| Affiliation: | 1. Low Dimensional Materials Research Centre, Physics Department, University Malaya, 50603, Kuala Lumpur, Malaysia;2. Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, 16424 Depok, Indonesia;3. School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia;1. College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China;2. College of Agronomy, Anhui Agricultural University, Hefei 230036, China |
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| Abstract: | A systematic study was carried out to explore the electrochemical behavior of Ce in room temperature ionic liquid (CnmimBr, where n=6, 8, 10) and mixture of C6mimBr and ethanol by cyclic voltammetry. With increase in the number of carbon atoms on the alkyl substituent on methyl imidazolium cation, the electrochemical window of the ionic liquids was found to extend towards more negative potential value, as a result there was a possibility of reduction of Ce to lower oxidation states. The diffusion coefficient and activation energy for the diffusion were calculated in all the ionic liquids and one of their mixtures with ethanol. With increase in n value, the diffusion coefficient of Ce decreased due to increase in viscosity of the medium while the activation energy for the diffusion followed a reverse trend for C6mimBr, C8mimBr and C10mimBr, respectively. The observations indicated that the nature of species of Ce might be different in room temperature ionic liquids (RTILs) from that present in their mixtures with ethanol. |
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| Keywords: | ： cerium cyclic voltammetry diffusion coefficient activation energy ethanol Cn mimBr （n=6 8 10） rare earths |
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