金纳米粒子修饰电极对过氧化氢的电催化性能

Electrocatalytic Properties of Hydrogen Peroxide on Au Nanoparticles Modified Electrode

构建了一种基于金纳米粒子修饰电极的过氧化氢（H2O2）传感器。采用循环伏安法研究了修饰电极在H2O2溶液中的电化学行为。实验结果表明,在p H=6.8的PBS缓冲溶液中,该修饰电极对H2O2具有明显的催化还原作用。在优化实验条件下,采用计时电流法检测了H2O2的线性范围为2.5×10^-5-1.6×10^-3 mol/L,检测下限为1.0×10^-6 mol/L。此传感器具有较高的灵敏度、较好的重现性、稳定性及抗干扰能力。

A hydrogen peroxide sensor was constructed based on the gold nanoparticles modified electrode. The electrochemical property of the modified electrode was studied by cyclic voltammetry. The results showed that the electrode had high electrocatalytic activities toward the electro-reduction of H2O2. Linear relationship between current response and H2O2 concentration was observed in the range from 2.5×10^-5-1.6×10^-3 mol/L with a detection limit of 1.0×10^-6mol/L（S/N=3）. The as-prepared electrode demonstrated its high sensitivity, good reproducibility, high selectivity and good anti-interference ability for H2O2 reduction.