Related Experiment Video
Updated: Jan 20, 2026

Author Spotlight: Designing Sustainable Nanomaterials for Advancing Synthesis and Element Mixing
Published on: March 15, 2024
Dealloying of Nitrogen-Introduced Pt-Co Alloy Nanoparticles: Preferential Core-Shell Formation with Enhanced Activity
Shuntaro Takahashi1, Naoki Takahashi1, Naoto Todoroki1
1Graduate School of Environmental Studies, Tohoku University, Aoba-ku, Aramaki Aoba 6-6-2, Sendai 980-8579, Japan.
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 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.
Related Concept Videos
Oxidation-Reduction Reactions
Phase I Reactions: Reductive Reactions
The Nitrogen Cycle
Reactions at the Benzylic Position: Oxidation and Reduction
Synthesis and Decomposition Reactions
Alkenes via Reductive Coupling of Aldehydes or Ketones: McMurry Reaction

