Abstract

The 3-D composite electrodes consisting of Pt nanoparticles supported on nitrogen-doped carbon nanotubes (CN x ) grown directly on carbon paper were successfully prepared. The effect of the nitrogen atom incorporation in carbon nanotubes (CNTs) on the Pt nanoparticle dispersion and catalytic activities for the oxygen reduction reaction has been investigated. Compared to regular CNTs, highly dispersed Pt nanoparticles with smaller size (2–3 nm) and higher electrochemical Pt surface area as well as higher fuel cell performance were obtained for CN x .

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