Synergistic assembly of dendrimer-templated platinum catalysts on nitrogen-doped carbon nanotube electrodes for oxygen reduction

被引：136
作者：
Vijayaraghavan, Ganesh [1 ]
Stevenson, Keith J. [1 ]
机构：
[1] Univ Texas, Dept Chem & Biochem, Ctr Nano & Mol Sci & Technol, Texas Mat Inst, Austin, TX 78712 USA
来源：
LANGMUIR | 2007年 / 23卷 / 10期
关键词：
D O I：
10.1021/la0637263
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A study of the synergistic tuning of nitrogen-doped carbon nanotubes (NCNTs) as support- and size-monodisperse platinum nanoparticles templated from G4-NH2 dendrimers (Pt-DEN's) as catalysts targeted toward oxygen reduction is reported. UV-vis spectroscopy, adsorption isotherms, TGA, TEM, and voltammetry were used to characterize the loading and activity of Pt-DENs immobilized on CNT and NCNT supports. The facile uptake of Pt-DENs was found to be influenced by the number of edge plane sites on the NCNT support with higher adsorption rates observed for NCNTs 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 reduction reaction (ORR).
引用
收藏
页码：5279 / 5282
页数：4
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