CN_x nanotubes as catalyst support to immobilize platinum nanoparticles for methanol oxidation

Pt nanoparticles with sizes of 3-9 nm were well dispersed on carbon nitride (CN_x) nanotubes without needing pre-surface modification on the CN_x nanotubes due to the inherent chemical activity. The products were characterized by transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. All the experimental results revealed that Pt nanoparticles were immobilized on the CN_x nanotubes due to the N-participation in the connection of Pt species with the support. The electrocatalytic property of the as-prepared Pt/CN_x catalyst in methanol oxidation was examined by cyclic voltammetry. The results reveal that the so-constructed Pt/CN_x catalyst has obvious catalytic activity, suggesting potential applications in fuel cells.