物理化学学报 >> 2004, Vol. 20 >> Issue (04): 421-423.doi: 10.3866/PKU.WHXB20040419

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乳液引起的Daniell电池中的电化学振荡

褚效中;廉勃;周永贤;贺占博   

  1. 天津大学理学院化学系　300072
  • 收稿日期:2003-09-16 修回日期:2003-11-21 发布日期:2004-04-15
  • 通讯作者: 贺占博 E-mail:zbhe@eyou.com

Electrochemical Oscillation in Daniell Cell Induced by Emulsion

Chu Xiao-Zhong;Lian Bo;Zhou Yong-Xian;He Zhan-Bo   

  1. Department of Chemistry, School of Science, Tianjin Uiversity, Tianjin　300072
  • Received:2003-09-16 Revised:2003-11-21 Published:2004-04-15
  • Contact: He Zhan-Bo E-mail:zbhe@eyou.com

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摘要： 由油酸的煤油溶液与NaOH和CTAB两水溶液混合制成O/W型乳液.实验发现,此乳液的加入可使丹尼尔电池产生电池反应与电极反应的明显振荡现象.自发过程结束后,通以2 V, 50 Hz或100 Hz交流电4 h,则此电池反应可形成可逆振荡.由表面活性剂对电极表面的吸附和乳液结构变化解释了振荡机理.乳液混合能参与了此电化学反应.

关键词: 乳状液, 丹尼尔电池, 振荡, 可逆

Abstract: An O/W type emulsion was made from mixing of oleic acid kerosene solution, NaOH aqueous and CTAB aqueous. It was found that addition of the emulsion could make some Daniell cells, including Cu-Mg, Cu-Al, Cu-Zn, Cu-Fe cell; produce evident electrochemical oscillations which could last more than 4 h in both cell and electrode reactions. Reversible oscillations in the cell were also found after electrified with 2 V, 50 Hz or 100 Hz alternating current for 4 h. The oscillatory mechanism was explained by the adsorption of surfactant on the surface of electrode and emulsion structure changes according to observe under a microscope. The mixing energy of emulsion takes part in the electrochemical reaction.

Key words: Emulsions, Daniell cell, Oscillations, Reversible