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Effect of Graphite Nanofibers Addition on the Electrochemical Behaviors of Platinum Nanoparticles Deposited on Activated Carbons  

Jo, Wonbin (School of Chemical and Biomolecular Engineering, Pusan National University)
Oh, Misoon (School of Chemical and Biomolecular Engineering, Pusan National University)
Kim, Juhyun (School of Chemical and Biomolecular Engineering, Pusan National University)
Kim, Seok (School of Chemical and Biomolecular Engineering, Pusan National University)
Publication Information
Korean Chemical Engineering Research / v.48, no.6, 2010 , pp. 673-678 More about this Journal
Abstract
In the present study, mixed carbon-supported platinum(Pt) nanoparticles were prepared by a chemical reduction method of Pt precursor solution on two types of carbon materials such as activated carbons(ACs) and graphite nanofibers(GNFs). Average crystalline sizes and loading levels of Pt metal particles could be controlled by changing a content of GNFs. The highest electroactivity for methanol oxidation was obtained by preparing the carbon supports having 15 wt% GNFs. Furthermore, with an increase of GNFs content from 0% to 15%, an electrical conductivity was changed from $10^{-4}S/cm$ to $10^{-1}S/cm$. By an introduction of 10 wt% GNFs additive, the electroactivity of platinum particles was enhanced, but was saturated in the case of 15 wt% GNFs contents. This was related with the fact that the electroactivity change was dependent on the electrical conductivity of mixed carbon supports and Pt particle deposition content or deposition morphology.
Keywords
Carbon Supports; Graphite Nanofibers; Activated Carbons; Platinum Nanoparticles; Electrochemical Behaviors;
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Times Cited By KSCI : 5  (Citation Analysis)
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