Radially Phase Segregated PtCu@PtCuNi Dendrite@Frame Nanocatalyst for the Oxygen Reduction Reaction

Jongsik Park, Mrinal Kanti Kabiraz, Hyukbu Kwon, Suhyun Park, Hionsuck Baik, Sang Il Choi, Kwangyeol Lee

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)

Abstract

Pt-based alloy nanoframes have shown great potential as electrocatalysts toward the oxygen reduction reaction (ORR) in fuel cells. However, the intrinsically infirm nanoframes could be severely deformed during extended electro-cyclings, which eventually leads to the loss of the initial catalytic activity. Therefore, the structurally robust nanoframe is a worthy synthetic target. Furthermore, ternary alloy phase electrocatalysts offer more opportunities in optimizing the stability and activity than binary alloy ones. Herein, we report a robust PtCuNi ternary nanoframe, structurally fortified with an inner-lying PtCu dendrite, which shows a highly active and stable catalytic performance toward ORR. Remarkably, the PtCu@PtCuNi catalyst exhibited 11 and 16 times higher mass and specific activities than those of commercial Pt/C.

Original languageEnglish
Pages (from-to)10844-10851
Number of pages8
JournalACS nano
Volume11
Issue number11
DOIs
Publication statusPublished - 2017 Nov 28

Keywords

  • dendrite@frame
  • electrocatalysis
  • kinetic control
  • oxygen reduction reaction
  • phase segregation
  • ternary alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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