| Investigation on Concentrated Ⅴ（Ⅳ）/Ⅴ（Ⅴ） Redox Reaction by Rotating Disc Voltammetry |
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| 引用本文： | 文越华,张华民,钱鹏,马海鹏,衣宝廉,杨裕生.Investigation on Concentrated Ⅴ（Ⅳ）/Ⅴ（Ⅴ） Redox Reaction by Rotating Disc Voltammetry[J].中国化学,2007,25(3):278-283. |
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| 作者姓名： | 文越华 张华民 钱鹏 马海鹏 衣宝廉 杨裕生 |
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| 作者单位： | [1]Full Cell R＆D Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China [2]Research Institute of Chemical Defense, Beijing 100083, China |
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| 基金项目： | Project supported by the Grant 863 Program of China （No. 2005AA516020）. |
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| 摘 要： | The kinetic characteristics of the concentrated Ⅴ（Ⅳ）/Ⅴ（Ⅴ） couple have been studied at a glassy carbon electrode in sulfuric acid using rotating-disc electrode and cyclic voltammetry. The kinetics of the Ⅴ（Ⅳ）/Ⅴ（Ⅴ） redox couple reaction was found to be electrochemically quasi-reversible with the slower kinetics for the Ⅴ（Ⅴ） reduction than that for the Ⅴ（Ⅳ） oxidation. And, dependence of diffusion coefficients and kinetic parameters of Ⅴ（Ⅳ） species on the Ⅴ（Ⅳ） and H2SO4 concentration was investigated. It is shown that the concentration of active species Ⅴ（Ⅳ） should be over 1 mol·L^-1 for the redox flow battery application. Further, with increasing the Ⅴ（Ⅳ） and H2SO4 concentration, the diffusion coefficients of Ⅴ（Ⅳ） were gradually reduced whereas its kinetics was improved considerably, especially in the case of Ⅴ（Ⅳ） and H2SO4 up to 2 and 4 mol·L^-1.
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| 关 键 词： | 氧化还原反应 钒氧化还原液流电池 Ⅴ（Ⅳ）/Ⅴ（Ⅴ）耦合 高浓度 转盘伏安法 电极 |
| 修稿时间： | 2006-08-282006-11-13 |
Investigation on Concentrated V(IV)/V(V) Redox Reaction by Rotating Disc Voltammetry |
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| WEN Yue-Hua, ZHANG Hua-Min, QIAN Peng, MA Hai-Peng, YI Bao-Lian,YANG Yu-Sheng.Investigation on Concentrated V(IV)/V(V) Redox Reaction by Rotating Disc Voltammetry[J].Chinese Journal of Chemistry,2007,25(3):278-283. |
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| Authors: | WEN Yue-Hua ZHANG Hua-Min QIAN Peng MA Hai-Peng YI Bao-Lian YANG Yu-Sheng |
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| Institution: | 1. Full Cell R&D Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China;2. Research Institute of Chemical Defense, Beijing 100083, China;3. Tel.: 0086‐0411‐84379072 |
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| Abstract: | The kinetic characteristics of the concentrated V(IV)/V(V) couple have been studied at a glassy carbon electrode in sulfuric acid using rotating‐disc electrode and cyclic voltammetry. The kinetics of the V(IV)/V(V) redox couple reaction was found to be electrochemically quasi‐reversible with the slower kinetics for the V(V) reduction than that for the V(IV) oxidation. And, dependence of diffusion coefficients and kinetic parameters of V(IV) species on the V(IV) and H2SO4 concentration was investigated. It is shown that the concentration of active species V(IV) should be over 1 mol·L?1 for the redox flow battery application. Further, with increasing the V(IV) and H2SO4 concentration, the diffusion coefficients of V(IV) were gradually reduced whereas its kinetics was improved considerably, especially in the case of V(IV) and H2SO4 up to 2 and 4 mol·L?1. |
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| Keywords: | vanadium redox flow battery V(IV)/V(V) couple high concentration rotating‐disc electrode parameter |
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