High loading Pt nanoparticles on ordered mesoporous carbon sphere arrays for highly active methanol electro-oxidation
By Cheng-Wei Zhang and Lian-Bin Xu and Jian-Feng Chen
Published in Chinese Chemical Letters
NULL
2016
Abstract
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 m2 g?1) and electrocatalytic activity (0.69 mA cm?2) for the \MOR\ compared with the commercial 60 wt% Pt/C catalyst.
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