Vertex-Reinforced PtCuCo Ternary Nanoframes as Efficient and Stable Electrocatalysts for the Oxygen Reduction Reaction and the Methanol Oxidation Reaction

Taehyun Kwon, Minki Jun, Ho Young Kim, Aram Oh, Jongsik Park, Hionsuck Baik, Sang Hoon Joo, Kwangyeol Lee

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

Noble metal binary alloy nanoframes have emerged as a new class of fuel cell electrocatalysts because of their intrinsic high catalytic surface area and accompanied high catalytic activity. However, their inferior structural and compositional stability during catalysis pose as formidable huddles to their practical applications. Herein, it is reported that introduction of an additional component to the binary catalytic system may serve as a simple and effective means of enhancing the structural and compositional stability of nanoframe-based electrocatalysts. It is demonstrated that in situ doping of Co to the PtCu alloy nanoframe yields a ternary PtCuCo rhombic dodecahedral nanoframe (Co-PtCu RNF) with a reinforced vertex structure. Co-PtCu RNF exhibits superior electrocatalytic activity and durability for the oxygen reduction reaction to those of PtCu rhombic dodecahedral nanoframe (PtCu RNF) and Pt/C catalysts, due to its ternary composition and vertex-strengthened frame structure. Furthermore, Co-PtCu RNF shows enhanced activity for the methanol oxidation reaction as compared to PtCu RNF and Pt/C.

Original languageEnglish
Article number1706440
JournalAdvanced Functional Materials
Volume28
Issue number13
DOIs
Publication statusPublished - 2018 Mar 28

Keywords

  • fuel cell electrocatalysts
  • nanoframes
  • platinum
  • stability
  • ternary alloys

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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