Title :
Improved carbon nanotube supported Pt nanocatalyts with lyophilization method
Author :
He, Daping ; Mu, Shichun ; Pan, Mu
Author_Institution :
State Key Lab. of Adv. Technol. for Mater. Synthesis & Process., Wuhan Univ. of Technol., Wuhan, China
Abstract :
The lyophilization method was used to enhance platinum (Pt) nanoparticle distribution on single-walled cabon nanotube (SWCNT). The results indicate that this method is very available to uniformly disperse nanotubes and effectively prevent Pt metal particles from agglomeration. The Platinum nanoparticle size ranging from 2 to 5 nm in diameter and uniformly deposited on SWCNT characterized by both transmission electron microscopy (TEM) and X-ray diffraction (XRD), instead, Pt/ SWCNT catalysts fabricated by drying method present a lower dispersion degree compared with that by lyophilization method. The as-prepared catalysts have higher electrochemical active surface area and higher ORR activity as compared to that by drying method characterized by cyclic voltammetry (CV) and oxygen reduction reaction (ORR).
Keywords :
X-ray diffraction; carbon nanotubes; catalysts; drying; nanofabrication; nanoparticles; particle size; platinum; transmission electron microscopy; voltammetry (chemical analysis); C; Pt; TEM; X-ray diffraction; XRD; agglomeration; cyclic voltammetry; drying method; electrochemical active surface area; enhanced nanoparticle distribution; lyophilization method; nanocatalyts; nanoparticle size; oxygen reduction reaction; single-walled cabon nanotube; transmission electron microscopy; Carbon dioxide; Carbon nanotubes; Dispersion; Fuel cells; Helium; Laboratories; Nanoparticles; Organic materials; Platinum; Pollution measurement;
Conference_Titel :
Nanoelectronics Conference (INEC), 2010 3rd International
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-3543-2
Electronic_ISBN :
978-1-4244-3544-9
DOI :
10.1109/INEC.2010.5425069
