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An Oxyfluorination Effect of Carbon Nanotubes Supports on Electrochemical Behaviors of Platinum Nanoparticle Electrodes  

Kim, Seok (Advanced Materials Division, Korea Research Institute of Chemical Technology)
Lee, Jae-Rock (Advanced Materials Division, Korea Research Institute of Chemical Technology)
Park, Soo-Jin (Department of Chemistry, Inha University)
Publication Information
Korean Chemical Engineering Research / v.46, no.1, 2008 , pp. 118-123 More about this Journal
Abstract
In the present study, the effect of oxyfluorination treatment on multi-walled nanotubes (MWNTs) supports was investigated by analyzing surface functional groups. The surface characteristics were determined by Fourier transformed-infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS). After the deposition of platinum nanoparticles on the above treated carbon supports, a crystalline size and a loading level had been investigated. Electrochemical properties of the treated MWNTs-supported Pt (Pt/MWNTs) catalysts were analyzed by current-voltage curve measurements. From the results of surface analysis, an oxygen and fluorine-containing functional group had been introduced to the surface of carbon supports. The oxygen and fluorine contents were the highest value at the treatment of 100 temperature. The Pt/100-MWNTs showed the smallest particle crystalline size of 3.5 nm and the highest loading level of 9.4% at the treatment of 100 temperature. However, the sample treated at the higher temperature showed the larger crystalline size and the lower loading level. This indicated that the crystalline size and the loading level could be controlled by changing the temperature of oxyfluorination treatment. Accordingly, an electrochemical activity was enhanced by increasing the temperature of treatment upto 100, and then decreased in the case of 200 and 300. The highest specific current density of 120 mA/mg had been obtained in the case of Pt/100-MWNTs.
Keywords
Oxyfluorination Treatment; Multi-Walled Nanotubes; Platinum; Electrochemical Properties;
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Times Cited By KSCI : 2  (Citation Analysis)
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