| 초록 |
In my study, Pt-PDA-RGO composites were prepared by a facile chemical method. The formed polydopamine (PDA) surface containing abundant positively charged sites with high values of nitrogen contents enable to absorb on the carbon surface throughout π- π interaction between carbon material and PDA. It is attributed to preventing graphene sheets from aggregation and restacking in aqueous solution, resulting long-term durability for methanol oxidation in DMFC operation. Also, PDA plays an important role in controlling the size of Pt nanoparticles as well as their stability. Pt-PDA-RGO composites exhibited not only excellent electrocatalytic active but also long-term stability for the oxidation of methanol in the DMFC (Direct Methanol Fuel Cells). The structure, morphology and composition of Pt-PDA-RGO composites were measured by SEM, TEM and FT-IR. Also, the electrocatalytic properties of Pt-PDA-RGO composites were evaluated by Cyclic Voltammetry and Chronoamperometry. |
