引入氮的铂钴合金纳米颗粒的脱合金化：优先形成核壳结构并增强氧还原反应活性。

Takahashi Shuntaro, Takahashi Naoki, Todoroki Naoto, Wadayama Toshimasa

Graduate School of Environmental Studies, Tohoku University, Aoba-ku, Aramaki Aoba 6-6-2, Sendai 980-8579, Japan.

ACS Omega. 2016 Dec 15;1(6):1247-1252. doi: 10.1021/acsomega.6b00412. eCollection 2016 Dec 31.

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.

伏安脱合金法是一种合成用于氧还原反应（ORR）的铂壳/贱金属（M）合金核纳米颗粒（NPs）的典型方法。铂 - M合金纳米颗粒的原始纳米结构应决定脱合金纳米颗粒的ORR活性。在本研究中，我们研究了通过同步电弧等离子体沉积铂和钴生成的铂 - 钴以及氮掺杂铂 - 钴合金纳米颗粒的伏安脱合金行为。结果表明，脱合金行为对原始纳米颗粒中的氮化钴敏感，导致优先生成具有增强的ORR活性的富铂壳/铂 - 钴合金核结构。