Pt纳米粒子修饰石墨烯材料的制备及其应用研究

Preparation and application of metallic nanoparticles modified graphene materials

通过酰胺化的方法(二酰亚胺活化)制备了氧化石墨烯(GO)支撑的Pt(GO-Pt)纳米粒子,研究了其作为0.5mol/L H_2SO_4溶液中联胺电氧化电催化剂的催化活性与稳定性。通过表征技术探究了GO-Pt纳米粒子的物理化学性质,GO-Pt纳米粒子的平均粒径为2.6nm,其粘附性强,并且Pt纳米粒子高度密集的分散沉积在酰胺化的GO上。循环伏安图表明,与商业Pt/C和Pt金属电极相比,该催化剂在催化强酸性溶液中联胺的电氧化过程中,能够明显地提高催化活性和长期稳定性。这些增强的电化学性质归因于小尺寸且分散性极好的Pt纳米粒子沉积在酰胺化GO后形成的大量电化学活性表面。

In this paper,the Pt nanoparticles supported by graphite oxide(GO-Pt)were prepared by amide method(Imide activation),and the catalytic activity and stability of the electrochemical catalysts for 0.5 mol/L H 2SO 4 solution were studied.The physicochemical properties of Go-Pt nanoparticles were studied through various characterization techniques:the average particle size of Go-Pt nanoparticles was 2.6 nm,its adhesion was strong,and Pt nanoparticles were highly dense dispersed deposited on the amide go.The cyclic voltammetry shows that the catalyst can significantly improve the catalytic activity and long-term stability in the process of electrochemical oxidation of the amine in a strong acidic solution compared with commercial Pt/C and Pt metal electrodes.These enhanced electrochemical properties are attributed to the large amount of electrochemical active surface area formed by small size and highly dispersed Pt nanoparticles deposited in amide go.