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Three-dimensionally(3D) ordered mesoporous carbon sphere arrays(OMCS) are explored to support high loading(60 wt%) Pt nanoparticles as electrocatalysts for the methanol oxidation reaction(MOR).The OMCS has a unique hierarchical nanostructure with ordered large mesopores and macropores that can facilitate high dispersion of the Pt nanoparticles and fast mass transport during the reactions. The prepared Pt/OMCS exhibits uniformly dispersed Pt nanoparticles with an average size of ~ 2.0 nm on the mesoporous walls of the carbon spheres. The Pt/OMCS catalyst shows significantly enhanced specific electrochemically active surface area(ECSA)(73.5 m~2g~(-1)) and electrocatalytic activity(0.69 mA cm~(-2))for the MOR compared with the commercial 60 wt% Pt/C catalyst.
The OMCS has a unique hierarchical nanostructure with ordered large mesopores and (3) three-dimensionally (3D) ordered mesoporous carbon sphere arrays (OMCS) are explored to support high loading (60 wt%) of Pt nanoparticles as electrocatalysts for the methanol oxidation reaction The prepared Pt / OMCS exhibits uniformly dispersed nanoparticles of Pt nanoparticles with an average size of ~ 2.0 nm on the mesoporous walls of the carbon spheres. The Pt / OMCS catalyst showed significantly enhanced electrochemically active surface area (ECSA) (73.5 m ~ 2g -1) and electrocatalytic activity (0.69 mA cm -2) for the MOR compared with the commercial 60 wt% Pt / C catalyst.