Dealloying of nitrogen-introduced pt-co alloy nanoparticles: Preferential core-shell formation with enhanced activity for oxygen reduction reaction

Shuntaro Takahashi, Naoki Takahashi, Naoto Todoroki, Toshimasa Wadayama

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Voltammetric dealloying is a typical method to synthesize Pt-shell/less-noble metal (M) alloy core nanoparticles (NPs) toward the oxygen reduction reaction (ORR). The pristine nanostructures of the Pt-M alloy NPs should determine the ORR activity of the dealloyed NPs. In this study, we investigated the voltammetric dealloying behavior of the Pt-Co and nitrogenintroduced Pt-Co alloy NPs generated by synchronous arc-plasma deposition of Pt and Co. The results showed that the dealloying behavior is sensitive to cobalt nitride in the pristine NPs, leading to the preferential generation of a Pt-rich shell/Pt-Co alloy core architecture having enhanced ORR activity.

Original languageEnglish
Pages (from-to)1247-1252
Number of pages6
JournalACS Omega
Volume1
Issue number6
DOIs
Publication statusPublished - 2016 Dec 31

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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