Dealloying of Nitrogen-Introduced Pt–Co Alloy Nanoparticles: Preferential Core–Shell Formation with Enhanced Activity for Oxygen Reduction Reaction | Zendy

Shuntaro Takahashi | Zendy; Naoki Takahashi | Zendy; Naoto Todoroki | Zendy; Toshimasa Wadayama | Zendy

Open Access

Dealloying of Nitrogen-Introduced Pt–Co Alloy Nanoparticles: Preferential Core–Shell Formation with Enhanced Activity for Oxygen Reduction Reaction

Author(s) -

Shuntaro Takahashi,

Naoki Takahashi,

Naoto Todoroki,

Toshimasa Wadayama

Publication year - 2016

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.6b00412

Subject(s) - alloy , materials science , nanoparticle , chemical engineering , cobalt , oxygen reduction reaction , noble metal , nanostructure , nitride , nitrogen , metal , oxygen , nanotechnology , electrochemistry , metallurgy , electrode , chemistry , layer (electronics) , organic chemistry , engineering

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 nitrogen-introduced 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.

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