铁氰化镍修饰电极的制备及电催化氧化肼的研究

Determination of Hydrazine Using Nickelous Hexacyanoferrate Film Modified Electrode

用电化学方法在导电基体电极上制备出性能稳定的铁氰化镍(NiHCF)膜电极。对NiHCF膜电极的电化学行为进行了表征,并研究了电极对水合肼、甲基肼、二甲基肼等肼类物质的电催化氧化作用。结果表明肼在NiHCF膜电极上的氧化电位比在玻碳电极上负移600mV以上,而且在肼的浓度为1.0×10^(-6)～1.0×10^(-2)mol/L范围内,催化峰电流与肼浓度呈良好的线性关系。用于含肼样品中肼含量的测定,得到满意的结果。

The nickelous hexacyanoferrate (NiHCF) film modified electrode was made by electrochemical depositing method. The effects of electrolyte,pH and other variables on the voltammetric behaviour of the modified film have been studied. The electrocatalytic oxidation of hydrazine, methylhydrazine and dimethylhydrazine on NiHCF film modifid electrode was described. The oxidation peak potential shifted negatively 600mV. The modified electrode can be used for the determination of hydrazine in the concentration range of 1.0×10^(-6)～1.0×10^(-2)mol/L. This method has been applied successfully to the analysis of samples including hydrazine.