S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Journal Papers (저널논문_화학생물공학부)
Preparation of platinum nanoparticles on carbon black with mixed binary surfactants: Characterization and evaluation as anode catalyst for low-temperature fuel cell
- Lim, Dong-Ha; Lee, Weon-Doo; Choi, Dong-Hyeok; Park, Dal-Ryung; Lee, Ho-In
- Issue Date
- Journal of Power Sources 185 (2008) 159–165
- Low-temperature fuel cell; Colloidal method; Surfactant; Electrocatalysts; Platinum nanoparticles
- 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.
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