One-pot synthesis of core-shell-like Pt3Co 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

doi:10.1039/c1ee01825f

One-pot synthesis of core-shell-like Pt₃Co 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

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

80 Scopus citations

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.

Original language	English
Pages (from-to)	4947-4953
Number of pages	7
Journal	Energy and Environmental Science
Volume	4
Issue number	12
DOIs	https://doi.org/10.1039/c1ee01825f
State	Published - Dec 2011

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

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.",

author = "Jang, {Ji Hoon} and Juyeong Kim and Lee, {Yang Hee} and Kim, {In Young} and Park, {Min Ho} and Yang, {Cheol Woong} and Hwang, {Seong Ju} and Kwon, {Young Uk}",

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T1 - One-pot synthesis of core-shell-like Pt3Co nanoparticle electrocatalyst with Pt-enriched surface for oxygen reduction reaction in fuel cells

AU - Jang, Ji Hoon

AU - Kim, Juyeong

AU - Lee, Yang Hee

AU - Kim, In Young

AU - Park, Min Ho

AU - Yang, Cheol Woong

AU - Hwang, Seong Ju

AU - Kwon, Young Uk

PY - 2011/12

Y1 - 2011/12

N2 - 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.

AB - 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.

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JO - Energy and Environmental Science

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ER -

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