PtNi alloy nanoparticles prepared by nanocapsule method for ORR catalysts in alkaline media

Kenji Miyatake*, Yuma Shimizu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Nanocapsule methods could effectively provide metal and alloy nanoparticles with well-controlled particle size and size distribution by reducing metal complexes in reverse-micelles. Specifically, PtCo alloy nanoparticles deposited on carbon prepared by nanocapsule method exhibited high oxygen reduction reaction (ORR) activity in alkaline solution. A series of PtNi alloy nanoparticles deposited on acetylene black carbon support were synthesized via original nanocapsule method so that the alloy compositions, particles sizes and their distribution were well-controlled. PtNi/C exhibited high ORR activity with volcano-type dependence on the composition, where the optimum content of Ni was ca. 50 atom%. The enhancement of the catalytic activity in alkaline solution revealed a very narrow range of Ni content, similar to that of PtCo/C. Since the nanocapsule method is applicable to many other binary and even ternary alloy nanoparticles, more active alloy or non-precious metal catalysts may be found in the future.

Original languageEnglish
Pages (from-to)1495-1497
Number of pages3
JournalBulletin of the Chemical Society of Japan
Issue number10
Publication statusPublished - 2018
Externally publishedYes


  • Nanoparticles
  • Oxygen reduction reaction
  • PtNi alloys

ASJC Scopus subject areas

  • Chemistry(all)


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