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，Ｅｐｃ１＝—０．６０Ｖ（ｖｓ．ＳＣＥ）；第二对峰的Ｅｐｃ２＝—０．８４Ｖ，Ｅｐｃ２＝—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。
Nickel phthalocyanine(NiPc)-didodecyldimethylammonium bromide(DDAB) surfactant film electrode could be prepared by casting the mixture of NiPc with DDAB chloroform 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,Epcl=-0.64 V and Epal=-0.60 V(vs.SCE),while for the second pair,Epcl =-0.84 V,and Epal=-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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第10期1532-1536,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
酞菁镍
表面活性剂
薄膜电极
电化学
催化
Nickel phthalocyanine,Surfactant film electrode,Electrochemical catalysis
