中文摘要：

利用电聚合法和脉冲沉积技术制备了纳米银/聚多巴胺修饰的玻碳电极.通过循环伏安法和示差脉冲伏安法研究了该修饰电极上对硝基苯酚的电化学行为;讨论了扫描速度和支持电解质等条件对对硝基苯酚在修饰电极上催化还原的影响.结果表明,对硝基苯酚的示差脉冲峰电流在4×10^-5～3×10^-4mol/L范围内呈良好的线性关系.

英文摘要：

A glassy carbon electrode modified with silver particles under polydopamine film was prepared successfully by means of electropolymerization and pulsed electrodeposition.A detailed analysis of the scanning electron microscope images reveals that silver deposit,obtained under pulsed electrodeposition conditions,appears as homogeneously compact and the crystallites are well dispersed on the overoxidized polydopamine substrate than that observed on the unmodified glassy carbon surfaces.The resulting silver nanoparticle/polydopamine modified glassy carbon electrode（Ag/PDA/GC） was electrochemically characterized through the reduction of p-nitrophenol（pNP）.The potential needed for the reduction of the compound on the Ag/PDA/GC electrode is significantly less negative than that observed on the unmodified glassy carbon electrode substrates.A linear relationship between pNP concentration and current response was obtained in the range of 4×10^-5—3×10^-4 mol/L.The Ag/PDA/GC would be used in the practical application for detecting toxic nitrophenols.