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本文表明用旋转涂层法制备的聚乙烯二茂铁(PVFc)薄膜电极在水溶液和乙腈中,0.3～1.0V(vs.SCE)电位范围内均可呈现二茂铁(Fc)的氧化还原峰.PVFc薄膜电极对水溶液中的抗坏血酸(AH_2)在较宽的pH范围和较宽的浓度范围内均有良好的电催化氧化作用,为EC平行催化过程.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.PVFc薄膜电极的稳定性和催化稳定性都较好.在AH_2浓度6×10~(-2)～6×10~(-6)mol/L范围内,催化峰电流与AH_2浓度呈良好的线性关系,有应用于分析AH_2的意义.
This paper shows that the polyvinyl ferrocene (PVFc) thin film electrode prepared by the spin coating method can exhibit the redox peaks of ferrocene (Fc) in the potential range of 0.3 ~ 1.0 V (vs.SCE) in aqueous solution and acetonitrile .PVFc thin film electrode has good electrocatalytic oxidation to ascorbic acid (AH_2) in aqueous solution over a wide pH range and a wide range of concentrations, and is an EC parallel catalysis process. The rotating disk electrode was used to catalyze the catalytic process The kinetic parameters of the catalytic reaction were calculated and the stability and catalytic stability of the PVFc thin film electrode were better.When the concentration of AH_2 was in the range of 6 × 10 -2 to 6 × 10 -6 mol / There was a good linear relationship between the catalytic peak current and the concentration of AH_2, which has the significance for the analysis of AH_2.