聚3,3’-二氨基联苯胺修饰碳纤维微电极的研制及其电催化性能

The Preparation of Poly(3.3′-Diaminobenzidine) Modified Carbon Fiber Microelectrode and Its Electrocatalytical Properties

用恒电位法电活化碳纤维微电极，循环伏安法制备电聚合３，３’－二氨基联苯胺薄膜修饰碳纤维微电极，对电聚合条件以及聚合膜修饰电极的电化学性质进行了探讨．该修饰电极对ＮＯ－２，Ｈ２Ｏ２具有良好的催化作用，线性范围分别为５．０×１０－５ｍｏｌ／Ｌ～２．０ｍｏｌ／Ｌ×１０－３ｍｏｌ／Ｌ和６．０×１０－４～１．８×１０－２ｍｏｌ／Ｌ．

After pretreating the surface of carbon fiber microelectrode (CFME) with potentiostatic method, the poly(3,3′-diaminobenzidine) film mod fied CFME was prepared by using cyclic voltammetry. The conditions of electrochemical polymerization and the electrochemical behavior of the film were studied in detail. The results exhibit that the film could be used for electrocatalytic reduction of nitrite and hydrogen peroxide. The catalytic currents show good linear relationship with nitrite and hydrogen peroxide in the range of 5.0×10 -5 mol/L～2.0×10 -3 mol/L and 6.0×10 -4 mol/L～1.8×10 -2 mol/L respectively.