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Preparation of platinum nanoparticles on carbon black with mixed binary surfactants: Characterization and evaluation as anode catalyst for low-temperature fuel cell
Cited 31 time in
Web of Science
Cited 37 time in Scopus
- Authors
- Issue Date
- 2008-10
- Publisher
- Elsevier
- Citation
- Journal of Power Sources 185 (2008) 159–165
- Keywords
- Low-temperature fuel cell ; Colloidal method ; Surfactant ; Electrocatalysts ; Platinum nanoparticles
- Abstract
- Platinum nanoparticles supported on Vulcan XC-72R prepared by a surfactant-stabilized colloidal method
exhibit excellent properties as an anode catalyst for a low-temperature fuel cell. A Pt/C catalyst prepared
with a 10-fold critical micelle concentration of mixed non-ionic surfactants [polyoxyethylene (23) lauryl
ether + polyoxyethylene (20) sorbitan monolaurate (Brij 35 + Tween 20)] shows the highest catalytic
activity and the greatest electrochemical surface-active area among those prepared. The maximum current
density of this catalyst is much higher than that of a commercial Pt/C catalyst (E-TEK). Moreover, X-ray
diffraction and transmission electron microscopy analyses reveal that Pt/C prepared with Brij 35 + Tween
20 has an average particle size of 2.4nmwith quite a narrowdistribution between 2 and 3 nm, which is the
smallest among all the catalysts prepared. This is attributed to the formation of more compact micelles.
Mixtures of non-ionic and anionic surfactants result in less compact micelles.
- ISSN
- 0378-7753
- Language
- English
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