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Core@shell sub-ten-nanometer noble metal nanoparticles with a controllable thin Pt shell and their catalytic activity towards oxygen reduction

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Abstract

Reducing Pt loading, while improving electrocatalytic activity and the stability of Pt-based nanostructured materials, is currently a key challenge in green energy technology. Herein, we report the controllable synthesis of tri-metallic (Au@Ag@Pt) and bimetallic (Ag@Pt) particles consisting of a controllable thin Pt shell, via interface-mediated galvanic displacement. Through oil-ethanol-H2O interface mediation, the controllable “out to in” displacement of Ag atoms to Pt enables the formation of a thin Pt shell on monodisperse sub-ten-nanometer Au@Ag and Ag nanocrystals. The synthesized nanoparticles with a thin Pt shell exhibited potential catalytic activity towards the oxygen reduction reaction (ORR) due to the high exposure of Pt atoms.

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Authors and Affiliations

  1. Research Center of Materials Science, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China

    Ntirikwendera Deogratias, Muwei Ji, Yong Zhang, Jiajia Liu, Jiatao Zhang & Hesun Zhu

  2. Department of Materials Physics and Chemistry, Beijing Institute of Technology, Beijing, 100081, China

    Jiatao Zhang

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  1. Ntirikwendera Deogratias
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  2. Muwei Ji
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Correspondence to Jiatao Zhang.

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Deogratias, N., Ji, M., Zhang, Y. et al. Core@shell sub-ten-nanometer noble metal nanoparticles with a controllable thin Pt shell and their catalytic activity towards oxygen reduction. Nano Res. 8, 271–280 (2015). https://doi.org/10.1007/s12274-014-0664-z

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  • DOI: https://doi.org/10.1007/s12274-014-0664-z

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