聚苯胺/碳纳米管复合载体载铂催化剂的制备及其结构性能的研究

In this paper, at the aspect of the carriers, we have prepared high surface-active polyaniline/multi-wall carbon tube (PANI/MWNT) composite using in-situ polymerization. By comparison the properties of composite with different complex ratio, the optimal ratio was obtained. We also prepared the catalysts (Pt/PANI/MWNT) by depositing platinum on the composite carriers using chemical redox method. The morphology and structure were measured by SEM, TEM and FTIR. The electrochemical properties were detected by cyclic voltammetry and chronoamperometry. The interaction between the PANI and MWNT, Pt and carriers, and the disperse state of Pt particles on carriers, including the impact of particle size and distribution are explorated. PANI/MWNT composite with high surface activity followed by depositing platinum metals on the surface can improve the Pt utilization. The synergy between Pt particles and PANI promoted the ability of anti-CO poisoning, which has provide theoretical support for the application of the polymer/carbon composite supporting catalyst in DMFC.