Platinum based on the vulcan polyaniline doped trifluoromethane sulfonic acid composite as a new electrocatalyst for DMFC

The film of polyaniline nanowires (PANI (NW)) was deposited onto the surface of stainless steel electrode through cyclic voltametry polymerization of aniline (ANI), PANI (NW) was doped with triflorometan sulfonic acid and utilized for the fabrication of Vulcan (C), PANI composite and then Pt particles reduced on (C-PANI) composite, to result a Pt/C- PANI electrocatalyst. , The current peak of methanol oxidation, electrochemical surface area and the stability of Pt/C- PANI is better than Pt/C+ PANI and Pt/C electrodes. -The ionic resistance conductivity of two electrodes which containing polyaniline are rarity smaller than Pt/C and nafion solution catalyst but EIS measurements in modified electrodes don’t show negative impedance after OCV . It is found that the methanol diffusion coefficients in the Pt/C- PANI and Pt/C+ PANI are 2.5 and 2 times higher than the diffusion coefficient of methanol in Pt/C electrode.