普鲁士蓝修饰电极对H_(2)O_(2)的催化性能研究

Study on Catalytic Performance of Prussian Blue Modified Electrode on H_(2)O_(2)

普鲁士蓝是一种混合价态的化合物,具有三维离子通道和开放式框架结构,非常适合离子的快速迁移,H_(2)O_(2)的灵敏检测在许多领域具有重要意义。本文利用电化学沉积法制备了PB/Pt修饰电极,通过循环伏安法、i-t法研究了修饰电极对H_(2)O_(2)的催化性能,结果表明,反应峰电流随溶液浓度的增大而增大,溶液pH=2时,氧化峰电流最大,峰值电流与v1/2呈线性关系,说明PB/Pt电极催化H_(2)O_(2)的过程为扩散控制过程,同时通过i-t法检测出PB/Pt电极能有效排除UA和AA等的影响,具有良好的稳定性和抗干扰能力。

Prussian blue is a compound with mixed valence state.It has a three-dimensional ion channel and an open frame structure,which is very suitable for rapid ion migration.Sensitive detection of H_(2)O_(2) is of great significance in many fields.The catalytic performance of Pb/Pt modified electrode on H_(2)O_(2) was studied by cyclic voltammetry and i-t method.The results showed that the reaction peak current increases with the increase of solution concentration.When the solution pH was 2,the oxidation peak current reached the maximum,and the peak current had a linear relationship with V 1/2.It showed that the catalytic process of H_(2)O_(2) by Pb/Pt electrode was a diffusion controlled process.At the same time,the i-t method showed that the Pb/Pt electrode could effectively eliminate the effects of UA and AA,and had good stability and anti-interference ability.