Octahedral Pt-Ni nanoparticles prepared by pulse-like hydrothermal method for oxygen reduction reaction

Zhaoyi Yang, Meng Wang, Guicheng Liu, Ming Chen, Feng Ye, Weibin Zhang, Woochul Yang, Xindong Wang

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Herein, the pulse temperature is provided during the nucleation period of the nanoparticles to shorten the nucleation time for Pt-based nanoparticle growth. Herein, 3-nm-sized Pt-Ni alloy octahedral catalysts were prepared by pulse-like hydrothermal method. The influence of the pulse on nucleation is demonstrated by comparing the morphology obtained from the conditions of constant temperature and pulse temperature. It has been found that pulse temperature could decrease the nucleation time, and the final morphology of the nanoparticle is different due to the different growth temperatures and times. When used in oxygen reduction reaction, the octahedron Pt-Ni exhibited a 50 mV positive shift of the half-wave potential and the mass-specific activity and area-specific activity are 5 and 7 times higher than that of commercial 40% Pt/C at 0.9 V. Through this way, kinds of multiple alloy compounds could be composed with less time in the future. [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)293-300
Number of pages8
JournalIonics
Volume26
Issue number1
DOIs
StatePublished - 1 Jan 2020

Keywords

  • Electrochemical active surface area
  • Nanoparticles
  • Oxygen reduction reaction
  • Pt-Ni alloy
  • Temperature pulse

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