Characteristics of the carbon nanotubes supported Pt-Ni and Ni electrocatalysts for DMFC

Electrocatalysts, Pt-Ni and Ni, catalysts loaded separately about 20 wt.% onto carbon nanotubes (CNTs) by the impregnation method for a direct methanol fuel cell (DMFC). The particles size and morphology of these catalysts were confirmed by XRD and TEM analysis. From the X-ray diffraction analysis, the peaks of PtNi and Ni were displayed separately for each catalyst. TEM images showed that the metal catalysts were loaded uniformly and finely onto carbon nanotubes with sizes ranging from 2 to 4 nm. Finally, an electrochemical analysis was performed to determine catalytical activity of these catalysts by the cyclic voltammogram (CV).