高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (10): 1532.

• 论文 • 上一篇    下一篇

酞菁镍-表面活性剂薄膜修饰电极及其催化性能的研究

刘婷, 胡乃非, 曾泳淮   

  1. 北京师范大学化学系, 北京, 100875
  • 收稿日期:1995-09-12 出版日期:1996-10-24 发布日期:1996-10-24
  • 通讯作者: 胡乃非
  • 作者简介:刘婷,女,28岁,硕士研究生.
  • 基金资助:

    国家自然科学基金

Studies on Nickel Phthalocyanine-Surfactant Film Modified Electrode and Its Catalytic Properties

LIU Ting, HU Nai-Fei, ZENG Yong-Huai   

  1. Department of Chemistry, beijing Normal University, Beijing 100875
  • Received:1995-09-12 Online:1996-10-24 Published:1996-10-24

摘要: 将酞菁镍(NiPc)掺入阳离子表面活性剂双十二烷基二甲基溴化铵(DDAB)的氯仿溶液中,并涂布于热解石墨电极表面,待氯仿挥发后制得NiPc-DDAB薄膜电极。循环伏安实验表明,在KBr溶液中,该薄膜电极有两对良好且稳定的还原氧化峰,第一对峰的Epc1=-0.64V,Epa1=-0.60V(vs.SCE);第二对峰的Epc2=-0.84V,Epa2=-0.80V,本文着重探讨了第二对峰的电化学行为,估计了该体系的电化学参数如电子扩散系数De和非均相电极反应速率常数k0'.该薄膜电极可用于催化各种卤代乙酸的电化学还原,用多种表面分析技术对该薄膜进行了表征。

关键词: 酞菁镍, 表面活性剂薄膜电极, 电化学催化

Abstract: Nickel phthalocyanine(NiPc)-didodecyldimethylammonium bromide(DDAB) surfactant film electrode could be prepared by casting the mixture of NiPc with DDABchloroform solution on the surface of pyrolytic graphite electrode and then leaving the chloroform evaporated.Cyclic voltammetric experiments showed that,in KBr solution,the film electrode have two pairs of well-defined and stable reduction and oxidation peaks,For the first pair of peaks,Epc1=-0.64 Vand Epa1=-0.60 V(vs.SCE),while for the second pair,Epc1 =-0.84 V,and Epa1=-0.80 V,respectively,This paper studied the electrochemistry of the second pair emphatically.The electrochemical parameters,such as electron diffusion coefficient,De,and apparent heterogeneous electrode reaction rate constant,k0',were estimated.The NiPc-DDAB film electrode could be used to catalyze electrochemical reduction of various halogenated acetic acids.The NiPc-DDAB films were also characterized by various techniques of surface analysis.

Key words: Nickel phthalocyanine, Surfactant film electrode, Electrochemical catalysis

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