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

Joung Woon Kim, Borami Lim, Hyun Sook Jang, Seung Jun Hwang, Sung Jong Yoo, Jeong Sook Ha, Eun Ae Cho, Tae Hoon Lim, Suk Woo Nam, Soo Kil Kim

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29 Citations (Scopus)

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 °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/mgPt, 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.

Original languageEnglish
Pages (from-to)706-712
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number1
DOIs
Publication statusPublished - 2011 Jan

Keywords

  • Oxygen reduction
  • PEMFC
  • Pt catalyst
  • Size control

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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  • Cite this

    Kim, J. W., Lim, B., Jang, H. S., Hwang, S. J., Yoo, S. J., Ha, J. S., Cho, E. A., Lim, T. H., Nam, S. W., & Kim, S. K. (2011). Size-controlled synthesis of Pt nanoparticles and their electrochemical activities toward oxygen reduction. International Journal of Hydrogen Energy, 36(1), 706-712. https://doi.org/10.1016/j.ijhydene.2010.09.055