Electrodeposition of platinum nanoparticles on multi-walled carbon nanotubes for electrocatalytic oxidation of methanol

被引:57
作者
Ye, JS
Cui, HF
Wen, Y
Zhang, WD
Xu, GQ
Sheu, FS
机构
[1] Natl Univ Singapore, Dept Biol Sci, Singapore 117543, Singapore
[2] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore
[3] Inst Mat Res & Engn, Singapore 117602, Singapore
[4] Natl Univ Singapore, Univ Scholars Programme, Singapore 119260, Singapore
关键词
platinum nanoparticle; multi-walled carbon nanotubes; electrocatalysis; methanol;
D O I
10.1007/s00604-005-0446-0
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Platinum (Pt) nanoparticles were deposited at the surface of well-aligned multi-walled carbon nanotubes (MWNTs) by potential cycling between +0.50 and -0.70V at a scanning rate of 50 mV (.) s(-1) in 5 mM Na2PtCl6 solution containing 0.1 M NaCl. The electrocatalytic oxidation of methanol at the nanocomposites of Pt nanoparticles/nanotubes (Pt-nano/MWNTs) has been investigated using 0.2 M H2SO4 as supporting electrolyte. The effects of various parameters, such as Pt loading, concentration of methanol, medium temperature as well as the stability of Pt-nano/MWNTs electrode, have been studied. Compared to glassy carbon electrode, carbon nanotube electrode significantly enhances the catalytic efficiency of Pt nanoparticles for methanol oxidation. This improvement in performance is due not only to the high surface area and the fast electron transfer rate of nanotubes but also to the highly dispersed Pt nanoparticles as electrocatalysts at the tips and the sidewalls of nanotubes.
引用
收藏
页码:267 / 275
页数:9
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