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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

Title
One-pot synthesis of core-shell-like Pt3Co nanoparticle electrocatalyst with Pt-enriched surface for oxygen reduction reaction in fuel cells
Authors
Jang J.-H.Kim J.Lee Y.-H.Kim I.Y.Park M.-H.Yang C.-W.Hwang S.-J.Kwon Y.-U.
Ewha Authors
황성주
SCOPUS Author ID
황성주scopus
Issue Date
2011
Journal Title
Energy and Environmental Science
ISSN
1754-5692JCR Link
Citation
vol. 4, no. 12, pp. 4947 - 4953
Indexed
SCI; SCIE; SCOPUS WOS scopus
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. © The Royal Society of Chemistry 2011.
DOI
10.1039/c1ee01825f
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자연과학대학 > 화학·나노과학전공 > Journal papers
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