电化学制备普鲁士蓝-石墨烯复合物及对过氧化氢电催化性能研究

Electrodeposition of prussian blue nanoparticles on electrochemically reduced graphene oxide and synergistically electrocatalytic activity toward H_2O_2

通过电化学方法制备了普鲁士蓝-石墨烯复合物,利用扫描电子显微镜(SEM)技术表征了石墨烯及石墨烯复合物的形貌结构特征。选取H2O2作为探针分子,采用电化学技术考察了普鲁士蓝-石墨烯复合物对的电催化性能。复合物修饰电极对H2O2具有良好的电催化还原活性,增强的催化活性可能与石墨烯与普鲁士蓝纳米颗粒之间的协同效应有关。复合物电极材料能够实现对H2O2的快速、灵敏检测,有望用作检测H2O2的传感平台。

Prussian Blue （PB）/graphene composite materials were prepared by simple, green and controlled electrochemical method. The graphene oxide （GO） was electrochemically reduced into graphene firstly. Then PB nanoparticles were electrodeposited onto graphene with high specific surface area using cyclic voltammetric （CV） technique and finally obtained PB/graphene composites. The morphology and structure of graphene and PB/ graphene were characterized by scanning electron microscopy （SEM）. Eletrochemical testing techniques were used to investigate the electrocatalytic activity of PB/graphene composite towards the reduction of H2O2. Experimental results showed that the composite material exhibits a good electrocatalytic ac tivity for H2O2. The response current was linear in the concentration range of H202 from 1.0 × 10-4 to 9.0 × 10-4 mol/L with a correlation coefficient of 0. 9983 and a detection limit of 5.6 × 10-6 mol/L （S/N =3）. The composite materials are likely to be used as a sensing platform for the sensitive and fast detection of H2O2.