高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (3): 445.

• 论文 • 上一篇    下一篇

含钼碱性电解液中小分子醇在铂黑电极上氧化时的周期性及非周期性振荡

傅宏刚1, 于海涛1, 王俊东1, 陈旭1, 徐善鹏1, 黄菊英2   

  1. 1. 黑龙江大学化学化工学院, 哈尔滨 150080;
    2. 哈尔滨工业大学, 哈尔滨 150001
  • 收稿日期:1998-07-07 出版日期:1999-03-24 发布日期:1999-03-24
  • 通讯作者: 傅宏刚,男,36岁,博士研究生,副教授.
  • 作者简介:傅宏刚,男,36岁,博士研究生,副教授.
  • 基金资助:

    黑龙江省自然科学基金(批准号:94005)资助课题

Periodic and Aperiodic Oscillation of Cyclic Voltammetric Responses of Oxidition of Alcohol at Platinized Platinum Electrode in Alkaline Medium with Na2MoO4

FU Hong-Gang1, YU Hai-Tao1, WANG Jun-Dong1, CHEN Xu1, XU Shan-Peng1, HUANG Ju-Ying2   

  1. 1. Department of Chemistry, Heilongjiang University, Harbin, 150080;
    2. Harbin University of Technology, Harbin, 150001
  • Received:1998-07-07 Online:1999-03-24 Published:1999-03-24

摘要: 乙醇和甲醇在含钼碱性溶液中的铂黑电极上氧化时,在一定条件下可得到循环伏安曲线的周期性及非周期性振荡.通过微调下限电位可控制振荡的周期,其中非周期性振荡具有混沌的特性.讨论了钼的存在及碱浓度的变化对振荡的影响.结果表明,钼的氧化还原振子在电极表面与小分子醇的氧化过程中发生耦合作用是导致振荡的关键.

关键词: 电化学振荡, 混沌, 非线性

Abstract: Avariety of nonlinear phenomena, which was observed during the electrochemical oxidation of ethanol and methanol at a platinized platinum electrode, is described. The cyclic voltammetric responses of ethanol and methanol that are oxidized at a platinized platinum working electrode in alkaline medium with Na2MoO4show the periodic and aperiodic cyclic voltammetric oscillatory behavior. The periodic and aperiodic cyclic voltammetric oscillatory responses were obtained under given experiment conditions. The period of oscillation can be controlled by changing little low potential limit. The alkalinity has an important effect on the oscillation. The periodic oscillations appear when the concentration of ethanol vary between 0.5 mol/Land 1.0 mol/Land the solution contain Na2MoO4. Without Na2MoO4in the solution, the oscillation doesnt appear in such an alkalinity. The periodic and aperiodic oscillation have the properties of chaos. We consider that the nonlinear behavior is the surface.

Key words: Electrochemical oscillation, Chaos, Nonlinearity

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