Multimetallic Au/FePt3 nanoparticles as highly durable electrocatalyst

Chao Wang, Dennis Van Der Vliet, Karren L. More, Nestor J. Zaluzec, Sheng Peng, Shouheng Sun, Hideo Daimon, Guofeng Wang, Jeffrey Greeley, John Pearson, Arvydas P. Paulikas, Goran Karapetrov, Dusan Strmcnik, Nenad M. Markovic, Vojislav R. Stamenkovic

Research output: Contribution to journalArticlepeer-review

432 Scopus citations

Abstract

We report the design and synthesis of multimetallic Au/Pt-bimetallic nanoparticles as a highly durable electrocatalyst for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells. This system was first studied on well-defined Pt and FePt thin films deposited on a Au(111) surface, which has guided the development of novel synthetic routes toward shape-controlled Au nanoparticles coated with a Pt-bimetallic alloy. It has been demonstrated that these multimetallic Au/FePt3 nanoparticles possess both the high catalytic activity of Pt-bimetallic alloys and the superior durability of the tailored morphology and composition profile, with mass-activity enhancement of more than 1 order of magnitude over Pt catalysts. The reported synergy between well-defined surfaces and nanoparticle synthesis offers a persuasive approach toward advanced functional nanomaterials.

Original languageEnglish
Pages (from-to)919-926
Number of pages8
JournalNano Letters
Volume11
Issue number3
DOIs
StatePublished - Mar 9 2011

Keywords

  • Electrocatalysis
  • catalyst durability
  • composition profile
  • core/shell nanoparticles
  • multimetallic alloy catalysts
  • oxygen reduction reaction

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