| 硫氰酸盐电化学氧化的动力学复杂性 |
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| 引用本文： | 刘丽,冯加民,吴国光,吕小丽,高庆宇.硫氰酸盐电化学氧化的动力学复杂性[J].中国化学,2009,27(4):649-654. |
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| 作者姓名： | 刘丽 冯加民 吴国光 吕小丽 高庆宇 |
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| 作者单位： | （中国矿业大学化工学院，徐州，江苏 221008） |
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| 摘 要： | 本文利用多种电化学方法研究了多晶电极上硫氰酸盐电化学氧化的动力学和机理，观察到电流和电位振荡。循环伏安测量表明氧化动力学分为二步过程。除了振荡现象，系统也展示双稳态，利用时间电位扰动，氧化反应可在高电位和低电位稳态之间转换，而且强烈吸附的惰性离子也可诱导从振荡转化为稳态。
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| 关 键 词： | 硫氰酸盐 电化学氧化 非线性 铂电极 |
| 收稿时间： | 2008-3-17 |
| 修稿时间： | 2008-12-12 |
Dynamical Complexity in Electrochemical Oxidations of Thiocyanate |
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| Li LIU,Jiamin FENG,Guoguang WU,Xiaoli Lü,Qingyu Gao.Dynamical Complexity in Electrochemical Oxidations of Thiocyanate[J].Chinese Journal of Chemistry,2009,27(4):649-654. |
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| Authors: | Li LIU Jiamin FENG Guoguang WU Xiaoli LÜ Qingyu Gao |
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| Institution: | 1. College of Chemical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China;2. Tel.: 0086‐0516‐83591088;3. Fax: 0086‐0516‐83591088 |
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| Abstract: | Kinetics and mechanism of the electrochemical oxidation of thiocyanate on a Pt electrode were investigated by using various electrochemical methods, in which both current and potential oscillations have been observed. Cyclic voltammetry measurements illustrate that the oxidation process consists of two steps. In addition to the oscillatory behavior, the system also exhibits bistability, in which the oxidation could be switched between a high and a low current density states with a temporal potential perturbation. The presence of inert ions with stronger absorption also induces transitions from oscillatory to steady reactions in the thiocyanate system. |
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| Keywords: | thiocyanate electrochemical oxidation nonlinearity platinum electrode |
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