电化学活化玻碳电极制备铂纳米对多巴胺的电催化氧化(英文)

Deposition of Platinum Nanoparticles on the Electrochemically Activated Glassy Carbon Electrode for Electrocatalytic Oxidation of Dopamine

以电化学还原预吸附在活化玻碳电极表面层上的PtCl62-,制备铂纳米粒子。利用X-光电子能谱(XPS)、场发射扫描电镜(FE-SEM)和电化学方法研究了电极表面的性质。在大量抗坏血酸存在下,利用修饰电极实现了对多巴胺的检测,显示了良好的稳定性和灵敏度。传感器对多巴胺的线性检测范围在5.0×10-8～2.2×10-5 mol/L,检测限为1.0×10-8 mol/L。通过研究发现,多巴胺在修饰电极表面的电化学行为是典型的吸附控制过程。该传感器具有良好的灵敏度、稳定性、重复性和抗干扰性能。

A pre-adsorption followed by an electrochemical reduction for deposition of Pt nanoparticles on the surface layer of electrochemically activated Glassy Carbon electrode（GCE） was reported.X-ray photoelectron spectroscopy（XPS）,field emission scanning electron microscope（FE-SEM） and electrochemical experiments were used to characterize the conformation and property of the electrode surface.The modified electrode was used to determine dopamine（DA） in ascorbic acid（AA） solution,exhibiting stable and sensitive current response toward DA oxidation.The linear response was obtained in the range of 5.0×10-8 to 2.2×10-5 mol/L with a detection limit of 1.0×10-8 mol/L for DA（s/n = 3）.The DA oxidation was controlled by the adsorption surface process.The sensor had good sensitivity,stability,anti-interference ability and reproducibility.