过氧化聚吡咯-铁氰化钴/普鲁士蓝复合膜的制备及应用

采用循环伏安法在Co2＋、Fe3＋、K3Fe（CN）6共存的溶液将CoHCF/PB复合膜修饰于过氧化聚吡咯修饰的复合陶瓷碳电极表面（PPyox-CoHCF/PB/CCE）。采用扫描电镜（SEM）方法对修饰电极进行表征,并研究了修饰电极对H2O2的电催化活性。结果表明：PPyox膜的存在更易于Co-HCF/PB在其上的固载、改善了电极表面金属铁氰化物的分散性与修饰电极的电催化活性。在优化的实验条件下,安培法检测H2O2的线性范围为6.0×10-6～4.0×10-3mol.L-1,检出限为3.0×10-6mol.L-1（3 Sb,n=10）。

Preparation and Properties of PPyox- Cobalt/Ferric Hexacyanoferrate Film

A CoHCF/PB film was electrodeposited on the surface of PPyox/CCE in a solution containing Co^2＋ , Fe^3 ＋ and K3 Fe （CN） 6 using cyclic voltammetry. The morphology of the modified electrode was characterized by scanning electron microscopy （SEM） experiments, and the electrocatalytic performance of the PPyox/CoHCF/PB/CCE modi- fied electrode was investigated. The results showed that the existence of PPyox was favored to the deposition of com- pact and uniform CoHCF/PB film with good adhering. Under the optimum condition, the reduction peak current of the modified electrode was proportional to the concentration of H202 in the range of 6.0 × 10 -6 to 4.0 × 10 -3 mol·L-a with a detection limit of 3.0 × 10-6 mol · L-1 （3 Sb,n = 10）.