Icosahedral platinum alloy nanocrystals with enhanced electrocatalytic activities

Jianbo Wu, Liang Qi, Hongjun You, Adam Gross, Ju Li, Hong Yang

Research output: Contribution to journalArticlepeer-review


This communication describes the synthesis of Pt-M (M = Au, Ni, Pd) icosahedral nanocrystals based on the gas reducing agent in liquid solution method. Both CO gas and organic surface capping agents play critical roles in stabilizing the icosahedral shape with {111} surfaces. Among the Pt-M alloy icosahedral nanocrystals generated, Pt 3Ni had an impressive ORR specific activity of 1.83 mA/cm 2 Pt and 0.62 A/mg Pt. Our results further show that the area-specific activity of icosahedral Pt 3Ni catalysts was about 50% higher than that of the octahedral Pt 3Ni catalysts (1.26 mA/cm 2 Pt), even though both shapes are bound by {111} facets. Density functional theory calculations and molecular dynamics simulations indicate that this improvement may arise from strain-induced electronic effects.

Original languageEnglish (US)
Pages (from-to)11880-11883
Number of pages4
JournalJournal of the American Chemical Society
Issue number29
StatePublished - Jul 25 2012

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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