Abstract: Electrochemical behavior of FcCOOH/Nafion chemically modified electrodes has been studied in an aqueous solution. When scanning between 0.0～0.8V(vs. SCE), experiments indicate that the chemically modified electrode have good stability and reproducibility. It is found that the chemically modified electrodes have electrocatalytic activity to dopamine in the medium of 0.1mol/L LiClO₄ and 0.5mol/L glycine. The linear range for determining DA is 2.0×10^-5～1.5×10^-3mol/L and the correlation coefficient is 0.997. The apparent rate constant electrocataly-tically is evaluated by means of rotating disk electrode.

Key words: monocarboxylic group derivative of ferrocene, Nafion, modified electrode, electrocatalysis

摘要： 研究了涂布法制备的FcCOOH/Nafion在LiClO₄和甘氨酸底液中，0.0～0.8V(vs. SCE)电位范围内均可呈现FcCOOH的氧化还原峰。FcCOOH/Nafion聚合物薄膜修饰电极对水溶液中的多巴胺(DA)在pH 2.0～4.0范围内均有良好的电催化作用。利用旋转圆盘电极进行了催化过程动力学分析，求出了催化反应动力学参数。修饰电极的稳定性和催化稳定性都较好，在DA的浓度为2.0×10^-5～1.5×10^-3mol/L 的范围内，催化峰电流与DA的浓度呈良好的线性关系，有应用于分析DA的意义。

关键词: 二茂铁单羧基衍生物, Nafion, 修饰电极, 电化学催化