Polypyrrole-modified graphitized carbon black as a catalyst support for methanol oxidation

Surface-modified graphitized carbon black (GCB) was produced through carbonization of polypyrrole (Ppy) on the GCB surface to be used as a catalyst support for Pt nanoparticles in electro-oxidation of methanol. The Ppy modification led to the enhancement of the catalytic activity for the Pt catalysts. The improvement is largely attributed to uniform dispersion of the Pt nanoparticles as the Ppy modification appears to reduce the agglomeration of the Pt nanoparticles. The chronoamperometry and the accelerated cycling tests indicated that the Ppy modification did not improve the long-term stability of the GCB support for Pt.

Figure optionsDownload high-quality image (346 K)Download as PowerPoint slideHighlights
► The surface of the graphitized carbon black (GCB) was modified by polypyrrole.
► Carbonization of polypyrrole led to nitrogen doping of the GCB surface.
► The nitrogen doping allowed uniform loading of Pt catalysts on the GCB surface.
► The Pt-loaded GCB support was applied to electro-oxidation of methanol.
► The surface modification enhanced the catalytic activity and the CO-tolerance.