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Electrochemical Behaviors of Platinum Catalysts Deposited on the Plasma Treated Carbon Blacks Supports  

Kim, Seok (Advanced Materials Division, Korea Research Institute of Chemical Technology)
Cho, Mi-Hwa (Advanced Materials Division, Korea Research Institute of Chemical Technology)
Lee, Jae-Rock (Advanced Materials Division, Korea Research Institute of Chemical Technology)
Ryu, Ho-Jin (Advanced Materials Division, Korea Research Institute of Chemical Technology)
Park, Soo-Jin (Advanced Materials Division, Korea Research Institute of Chemical Technology)
Publication Information
Korean Chemical Engineering Research / v.43, no.6, 2005 , pp. 756-760 More about this Journal
Abstract
In this study, the effect of $N_2$-plasma treatment on carbon blacks (CBs) was investigated by analyzing acid-base surface values and surface functional groups of CBs. The surface characteristics of the CBs were determined by fourier transformed-infrared (FT-IR) spectrometer, X-ray photoelectron spectroscopy (XPS), and Boehm's titration method. Electrochemical properties of the plasma-treated CBs-supported Pt (Pt/CBs) catalysts were analyzed by cyclic voltammetry (CV) experiments. From the results of FT-IR and acid-base values, $N_2$-plasma treatment at 300 W intensity on the CBs led to the formation of the free radical. The peak intensity was increased with increasing the treatment time due to the formation of new basic functional groups(such as C-N, C=N, $-NH_3{^+}$, -NH, and =NH) by the free radical. Accordingly, the basic values were increased by the basic functional groups. However, after a specific reaction time, $N_2$-plasma treatment could hardly influence change of surface functional groups of CBs, due to the disappearance of free radical. Consequently, it was found that optimal treatment time was 30 second for electro activity of Pt/CBs catalysts.
Keywords
$N_2$-Plasma Treatment; Pt Catalysts; Carbon Blacks Supports; Electrochemical Properties;
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