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以聚乙烯亚胺(PEI)功能化的石墨烯(PEI-GNs)为载体,利用电化学还原法制备了Ag/PEI-GNs复合材料。运用X射线光电子能谱、X射线粉末衍射、扫描电镜等对复合材料的组成、结构、形态进行表征,结果表明,实验成功制备了Ag/PEI-GNs复合材料,且PEI-GNs改善了Ag粒子的分散性。运用电化学方法考察了PEI-GNs对Ag纳米粒子电催化性能的影响,结果表明,相对于Ag催化剂,Ag/PEI-GNs催化剂表现出更高的催化活性和稳定性,前者归因于Ag颗粒分散度高,后者是由于PEI-GNs与Ag颗粒之间的相互作用,减缓了Ag的迁移。
Polyethylene imine (PEI) functionalized graphene (PEI-GNs) as a carrier, prepared by electrochemical reduction Ag / PEI-GNs composite material. The composition, structure and morphology of the composites were characterized by X-ray photoelectron spectroscopy, X-ray powder diffraction and scanning electron microscopy. The results showed that Ag / PEI-GNs composites were successfully prepared and PEI-GNs improved the Ag particles Dispersibility. The effect of PEI-GNs on the electrocatalytic activity of Ag nanoparticles was investigated by electrochemical method. The results showed that Ag / PEI-GNs exhibited higher catalytic activity and stability than Ag catalysts, the former was attributed to Ag particles The dispersion is high, which is due to the interaction between PEI-GNs and Ag particles, slowing the migration of Ag.