A novel synthetic route for the preparation of core shell like carbon-supported nanoparticles with a Pt-rich shell

Youngick Cho, Woong Hee Lee, Hansung Kim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A novel synthetic process referred to as a protective coating method was developed for the fabrication of a carbon-supported Pt2Ni1 nanoparticle measuring approximately 5 nm in size with a Pt-rich shell via thermal treatment. A 3 to 5 nm thick polypyrrole layer encapsulating the surface of the Pt/C catalyst simultaneously acted as a sponge to absorb the Ni precursor and a physical barrier to inhibit the inevitable increase in particle size during the thermal treatment. The PPy layer does not behave as a poison to the catalyst because it is completely decomposed without carbonization on the Pt surface during the heat treatment in a H2-Ar mixture. As a result, the resultant Pt2Ni1/C catalyst with a Pt-rich shell exhibited improved stability under acidic conditions and catalytic activity in an oxygen reduction reaction. This journal is

Original languageEnglish
Pages (from-to)11635-11641
Number of pages7
JournalJournal of Materials Chemistry A
Volume2
Issue number30
DOIs
Publication statusPublished - 2014 Aug 14

Fingerprint

Carbon
Heat treatment
Nanoparticles
Catalysts
Poisons
Polypyrroles
Carbonization
Protective coatings
Catalyst activity
Particle size
Oxygen
Fabrication
polypyrrole

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

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abstract = "A novel synthetic process referred to as a protective coating method was developed for the fabrication of a carbon-supported Pt2Ni1 nanoparticle measuring approximately 5 nm in size with a Pt-rich shell via thermal treatment. A 3 to 5 nm thick polypyrrole layer encapsulating the surface of the Pt/C catalyst simultaneously acted as a sponge to absorb the Ni precursor and a physical barrier to inhibit the inevitable increase in particle size during the thermal treatment. The PPy layer does not behave as a poison to the catalyst because it is completely decomposed without carbonization on the Pt surface during the heat treatment in a H2-Ar mixture. As a result, the resultant Pt2Ni1/C catalyst with a Pt-rich shell exhibited improved stability under acidic conditions and catalytic activity in an oxygen reduction reaction. This journal is",
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A novel synthetic route for the preparation of core shell like carbon-supported nanoparticles with a Pt-rich shell. / Cho, Youngick; Lee, Woong Hee; Kim, Hansung.

In: Journal of Materials Chemistry A, Vol. 2, No. 30, 14.08.2014, p. 11635-11641.

Research output: Contribution to journalArticle

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