纳米铂电极的制备及其电化学行为  

Preparation of a nanometer-sized platinum electrode and its electrochemical behavior

作　　者：李晶[1] 汪振辉[1] 董小亚[1] 陈体伟[1] 乔海燕[1] 黄爱平[1] 

机构地区：[1]河南师范大学化学与环境科学学院,新乡453007

出　　处：《分析试验室》2008年第10期102-105,共4页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(20675026)项目资助

摘　　要：以镍铬合金为基体,采用电化学方法在其表面沉积制备了纳米Pt电极,用SEM对电极的形貌进行了表征,以亚铁氰化钾为分子探针考察了Pt电极的电化学性能。结果表明该电极对亚铁氰化钾具有稳定、灵敏的电化学响应,并对H2O2的电化学还原具有良好的催化活性。H2O2峰电流与其浓度在0.03-1.0 mmol/L范围内呈良好的线性关系,检出限（S/N=3）为7×10^-6mol/L。相同实验条件下,该纳米Pt电极的催化活性远高于纯Pt电极。The nanometer-sized platinum electrode was prepared on nichrome substrate surface with cyclic voltammetry. Scanning electron microscope （SEM） was employed to characterize the electrode surface. The electrochemical behavior of nanometer-sized Pt electrode was examined using K4 [ Fe（ CN）6 ] as the probe molecule. The results indicated that the electrode exhibited stable and sensitive response for K4[ Fe（CN）6 ] and had excellent electrocatalytic activity for the reduction of H2O2. The reduction peak current was linearly proportional to the concentration of HEO2 in the range of 0.03 - 1.0 mmol/L. The detection limit for S/N = 3 was 7 × 10^-6 mol/L. The electrocatalytic activity of the nanometer-sized Pt electrode toward H2O2 was much higher than that of the pure Pt electrode at the same conditions.

关 键 词：纳米Pt电极 电沉积 H2O2 循环伏安法 

分 类 号：O657.1[理学—分析化学]