银纳米修饰电极的制备及电化学行为

金属纳米粒子由于其小的体积和大的比表面积而具有独特的电子、光学和异相催化特性,是目前表面纳米工程及功能化纳米结构制备的一种理想研究对象1]。银纳米粒子可广泛应用于催化剂材料、电池的电极材料、低温导热材料和导电材料等,成为近年来人们研究的热点2,3]。在电化学方面,银纳米粒子具有比其他纳米粒子更为优异的导电性能和电催化性能。因此,研究银纳米粒子修饰电极有重要的应用价值和前景4]。1实验部分1.1仪器CHI660电化学工作站(USA);TU-1901型双光束紫外可见分光光度计(北京普析通用仪器公司);KQ-100型超声清洗器(昆山市超声…

Electrochemical Behaviour and Preparation of Silver Nanoparticle Modified Electrode

Electrode formed by silver nanoparticles has been obtained by a new method according to the self-assemble and electrochemical-assemble principles, which is capped by MPA and fabricated silver nanoparticles monolayer and multilayer films on pre-modified gold electrode. The performance of this modified electrode was studied by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS). The CV curve indicates that modified electrode 3(Ag-MPA)/2PDDA/4-ATP/Au was more active and steady than the others, and the EIS implies that the electrochemical impedance increased. The CV current of multilayer modified electrode was obviously higher than monolayer modified electrode in 0.5 mmol·L^-1 K₃Fe(CN)₆] solution.