One-pot synthesis of core-shell-like Pt 3 Co nanoparticle electrocatalyst with Pt-enriched surface for oxygen reduction reaction in fuel cells

Ji Hoon Jang, Juyeong Kim, Yang Hee Lee, In Young Kim, Min Ho Park, Cheol Woong Yang, Seong Ju Hwang, Young Uk Kwon

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

2-3 nm sized Pt 3 Co 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 Ru 3+ . 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.

Original languageEnglish
Pages (from-to)4947-4953
Number of pages7
JournalEnergy and Environmental Science
Volume4
Issue number12
DOIs
Publication statusPublished - 2011 Dec 1

Fingerprint

Electrocatalysts
fuel cell
Fuel cells
shell
Oxygen
Nanoparticles
oxygen
Ultrasonics
Polyols
X ray absorption
Magnetism
Vapor pressure
vapor pressure
nanoparticle
transmission electron microscopy
Carbon
replacement
Metals
Transmission electron microscopy
metal

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Pollution

Cite this

Jang, Ji Hoon ; Kim, Juyeong ; Lee, Yang Hee ; Kim, In Young ; Park, Min Ho ; Yang, Cheol Woong ; Hwang, Seong Ju ; Kwon, Young Uk. / One-pot synthesis of core-shell-like Pt 3 Co nanoparticle electrocatalyst with Pt-enriched surface for oxygen reduction reaction in fuel cells In: Energy and Environmental Science. 2011 ; Vol. 4, No. 12. pp. 4947-4953.
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One-pot synthesis of core-shell-like Pt 3 Co nanoparticle electrocatalyst with Pt-enriched surface for oxygen reduction reaction in fuel cells . / Jang, Ji Hoon; Kim, Juyeong; Lee, Yang Hee; Kim, In Young; Park, Min Ho; Yang, Cheol Woong; Hwang, Seong Ju; Kwon, Young Uk.

In: Energy and Environmental Science, Vol. 4, No. 12, 01.12.2011, p. 4947-4953.

Research output: Contribution to journalArticle

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AU - Jang, Ji Hoon

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AU - Park, Min Ho

AU - Yang, Cheol Woong

AU - Hwang, Seong Ju

AU - Kwon, Young Uk

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