Investigation the Stability and Methanol Oxidation Activity of Alloy Nano particles

Polyaniline fibers (PANI) were synthesized by chemical interfacial method and doped with Para toluene sulfonic acid. The doped PANI was utilized for the fabrication of a Vulcan-Polyaniline composite (C-PANI). Pt and Sn particles were subsequently deposited by reduction onto the CPANI composite to produce a PtSn(70:30)/C-PANI electrocatalyst. Catalytic activity of this electrocatalyst is compared with PtRu/C. Cyclic voltamettry studies in methanol oxidation reaction (MOR) show that the peak current density of PtSn(8:2)/C-20%PANI is about 40% more than PtRu/C and its onset potential is about 100 mV lesser. According to CO stripping test, PtSn(70:30)/C-20%PANI is more CO tolerant and it can be the main reason of its better catalytic activity in MOR. Also, durability in the MOR has been evaluated by accelerated durability test and it was shown that stability of PtSn(70:30)/C-PANI is considerably more than PtRu/C Ultimately, the PtSn(70:30)/C-20%PANI electrocatalyst is a good substitution for PtRu/C in a direct methanol fuel cell