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Size-controlled synthesis of Pt nanoparticles and their electrochemical activities toward oxygen reduction

Authors
Kim, Joung WoonLim, BoramiJang, Hyun-SookHwang, Seung JunYoo, Sung JongHa, Jeong SooCho, Eun AeLim, Tae-HoonNam, Suk WooKim, Soo-Kil
Issue Date
1월-2011
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
PEMFC; Pt catalyst; Size control; Oxygen reduction
Citation
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.36, no.1, pp.706 - 712
Indexed
SCIE
SCOPUS
Journal Title
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume
36
Number
1
Start Page
706
End Page
712
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/113316
DOI
10.1016/j.ijhydene.2010.09.055
ISSN
0360-3199
Abstract
Pt/C catalysts with high activity toward oxygen reduction reactions are fabricated in the presence of FeCl3 as an additive to control the Pt particle size. The polyol method is used for fabrication; 20 wt% Pt/C catalysts are produced with various amounts of FeCl3 under different fabrication conditions such as pH and temperature. Adding FeCl3 significantly reduces Pt particle size, which is believed to occur as a result of the interference of Pt reduction rate by Fe3+ ions. The average Pt particle size obtained using the fabrication conditions of Pt:Fe = 1:3 (mole ratio), pH = 10, and 130 degrees C is around 2.0 nm, which is much smaller than that of commercial or homemade Pt/C produced in the absence of FeCl3. The electrochemically active surface area of this catalyst is 60.6 m(2)/g. The mass activities at 0.9 and 0.85 V are 15.3 and 42.7 mA/mg(Pt), respectively, which is about 1.8-2.1 times higher than those of commercial Pt/C catalysts. PEMFC test results show that the performance of the Pt/C catalyst fabricated with FeCl3 additive is better than that of as commercial catalyst. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
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College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
Graduate School > GREEN SCHOOL (Graduate School of Energy and Environment) > 1. Journal Articles

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공과대학 (화공생명공학과)
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