Studies of Polyaniline Thin Layer Presence in Electrocatalytic Properties Pt-Sn/GC Electrode Modified by MWCNT for Methanol Oxidation

Electrocatalytic activities Pt and Pt_Sn nanoparticles supported on Multiwall carbon nanotubes and Vulcan carbon were examined for methanol oxidation reaction. The Pt/C, Pt_Sn/C, Pt/MWCNT, Pt_Sn/MWCNT catalysts were synthesized using a deposition_ reduction technique with sodium borohydride. The electrocatalysts were characterized by EDS, XRD, FESEM and cyclic voltammetry. The Pt_Sn/MWCNT electrocatalyst with an atomic ratio Pt/Sn (3:1) in MOR exhibited a higher forward peak current density and a lower peak potential during cyclic voltammetry compared to other electrocatalysts. Then the effect of glassy carbon electrode (GC) surface modification by a thin layer of polyaniline was investigated. The results showed that in present a thin layer of polyaniline and platinum-tin electrocatalytic particles supported on multiwall carbon nanotube (GC/polyaniline/Pt-Sn/CNT) the oxidation of methanol in aqueous acid media is considerably enhanced.