Issue 12, 2011
From the journal:

Energy & Environmental Science

One-pot synthesis of core–shell-like Pt3Co nanoparticle electrocatalyst with Pt-enriched surface for oxygen reduction reaction in fuel cells†

Ji-Hoon Jang,a   Juyeong Kim,a   Yang-Hee Lee,a   In Young Kim,b   Min-Ho Park,c   Cheol-Woong Yang,c   Seong-Ju Hwangb  and  Young-Uk Kwon*a  

* Corresponding authors

a Department of Chemistry, BK-21 School of Chemical Materials Sciences, SAINT/HINT, Sungkyunkwan University, Suwon, Korea
E-mail: ywkwon@skku.edu
Fax: +82-31-290-7075
Tel: +82-31-290-7070

b Department of Chemistry & Nano Sciences, Ewha Womans University, Seoul, Korea

c School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, Korea

Abstract

2–3 nm sized Pt3Co nanoparticles (NPs) with Pt-enriched shells on a carbon support were prepared by a one-step ultrasound polyol process on Pt(acac)2 (acac = acetylacetonate) and Co(acac)2. The ultrasound facilitates the conversion of Co(acac)2 and retards the conversion of Pt(acac)2 into NPs, which can be explained with the different vapour pressures of the metal precursors. The Pt-enriched shell structure of the NPs by this method, as opposed to the alloy-like elemental distribution of the NPs synthesized in similar conditions but without ultrasound, was evidenced by transmission electron microscopy, magnetism data, extended X-ray absorption fine structure analyses, and chemical replacement tests of Co with Ru3+. Electrochemical oxygen reduction reaction data of these NPs showed improved performance from the commercial Pt/C with the NPs with Pt-enriched shells showing the highest activity.

Graphical abstract: One-pot synthesis of core–shell-like Pt3Co nanoparticle electrocatalyst with Pt-enriched surface for oxygen reduction reaction in fuel cells

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Article information

DOI
https://doi.org/10.1039/C1EE01825F
Article type
Paper
Submitted
26 May 2011
Accepted
07 Sep 2011
First published
21 Oct 2011

Energy Environ. Sci., 2011,4, 4947-4953

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One-pot synthesis of core–shell-like Pt3Co nanoparticle electrocatalyst with Pt-enriched surface for oxygen reduction reaction in fuel cells

J. Jang, J. Kim, Y. Lee, I. Y. Kim, M. Park, C. Yang, S. Hwang and Y. Kwon, Energy Environ. Sci., 2011, 4, 4947 DOI: 10.1039/C1EE01825F

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