| Abstract
| - A study of the synergistic tuning of nitrogen-doped carbon nanotubes (NCNTs) as support- and size-monodisperseplatinum nanoparticles templated from G4-NH2 dendrimers (Pt-DEN's) as catalysts targeted toward oxygen reductionis reported. UV−vis spectroscopy, adsorption isotherms, TGA, TEM, and voltammetry were used to characterize theloading and activity of Pt-DENs immobilized on CNT and NCNT supports. The facile uptake of Pt-DENs was foundto be influenced by the number of edge plane sites on the NCNT support with higher adsorption rates observed forNCNTs with increased nitrogen content. Pt-DEN/NCNT composites exhibit high activity with a mass-transport-limited current density and mass activity of 2.3 mA cm-2 and 0.05 mA g-1, respectively, for the oxygen reductionreaction (ORR).
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