High loading and monodispersed Pt nanoparticles on multiwalled carbon nanotubes for high performance proton exchange membrane fuel cells

Composite electrodes consisting of Pt nanoparticles-supported on multiwalled carbon nanotubes grown directly on carbon paper (Pt/CNTs/carbon paper) have been synthesized by a new method using glacial acetic acid as a reducing agent. Transmission electron microscopy (TEM) images show that the Pt nano...

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Bibliographic Details
Published in:Journal of power sources 2008-03, Vol.177 (2), p.314-322
Main Authors: Saha, Madhu Sudan, Li, Ruying, Sun, Xueliang
Format: Article
Language:English
Subjects:
Acetic acid
Applied sciences
Carbon
Carbon nanotubes
Electrocatalysis
Electrodes
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
Glacial acetic acid
High density
High loading
Nanoparticles
Nanostructure
Platinum
Proton exchange membrane fuel cells
Pt nanoparticles
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Summary:Composite electrodes consisting of Pt nanoparticles-supported on multiwalled carbon nanotubes grown directly on carbon paper (Pt/CNTs/carbon paper) have been synthesized by a new method using glacial acetic acid as a reducing agent. Transmission electron microscopy (TEM) images show that the Pt nanoparticles with high density and relative small in size (2–4 nm) were monodispersed on the surface of CNTs. X-ray photoelectron spectroscopy (XPS) analysis indicates that the glacial acetic acid acts as a reducing agent and has the capability of producing a high density of oxygen-containing functional groups on the surface of CNTs that leads to high density and monodispersion of Pt nanoparticles. Compared with standard Pt/C electrode, the Pt/CNT/carbon paper composite electrodes exhibit higher electrocatalytic activity for methanol oxidation reaction and higher single-cell performance in a H 2/O 2 fuel cell.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2007.11.036