Synthesis and electrocatalytic oxygen reduction properties of truncated octahedral Pt3Ni nanoparticles

Jianbo Wu, Hong Yang

Research output: Contribution to journalArticlepeer-review


Pt3Ni nanoparticles have been obtained by shape-controlled synthesis and employed as oxygen reduction electrocatalysts for proton exchange membrane fuel cells (PEMFC). The effects of varying the synthesis parameters such as the types of the capping agent and the reducing agent, and the reaction time have been systematically studied. The as-prepared Pt3Ni nanoparticles were subjected to a butylamine-based surface treatment in order to prepare carbon-supported electrocatalysts. The Pt3Ni electrocatalysts show an areaspecific activity of 0.76 mA/cm2(Pt) at 0.9 V in an alkaline electrolyte, which is 4.5 times that of a commercial Pt/C catalyst (0.17 mA/cm2 (Pt)). The mass activity reached 0.30 A/mg(Pt) at 0.9 V, which is about twice that of the commercial Pt/C catalyst. Our results also show that the area-specific activities of these carbon-supported Pt3Ni electrocatalysts depend strongly on the (111) surface fraction, which is consistent with the results of a study based on Pt3Ni extended single-crystal surfaces.

Original languageEnglish (US)
Pages (from-to)72-82
Number of pages11
JournalNano Research
Issue number1
StatePublished - Jan 2011
Externally publishedYes


  • Pt-based alloy
  • alkaline solution
  • oxygen reduction reaction
  • shape control
  • truncated octahedron

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering
  • General Materials Science


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