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Nitrogen-Doped Carbon with Mesopore Confinement Efficiently Enhances the Tolerance, Sensitivity, and Stability of a Pt Catalyst for the Oxygen Reduction Reaction

Authors

  • Shuyan Gao,

    Corresponding author
    • School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, P. R. China
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  • Hao Fan,

    1. School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, P. R. China
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  • Xianjun Wei,

    1. School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, P. R. China
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  • Liang Li,

    Corresponding author
    1. Department of Physics, Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, P. R. China
    • School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, P. R. China
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  • Yoshio Bando,

    1. World Premier International (WPI) Center for Materials, Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Ibaraki, Japan
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  • Dmitri Golberg

    1. World Premier International (WPI) Center for Materials, Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Ibaraki, Japan
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E-mail: shuyangao@htu.cn, lli@suda.edu.cn

Abstract

Electrocatalysts for the oxygen reduction reaction (ORR) present some of the most challenging vulnerability issues reducing ORR performance and shortening their practical lifetime. Fuel crossover resistance, selective activity, and catalytic stability of ORR catalysts are still to be addressed. Here, a facile and in situ template-free synthesis of Pt-containing mesoporous nitrogen-doped carbon composites (Pt-m-N-C) is designed and specifically developed to overcome its drawback as an electrocatalyst for ORR, while its high activity is sustained. The as-prepared Pt-m-N-C catalyst exhibits high electrocatalytic activity, dominant four-electron oxygen reduction pathway, superior stability, fuel crossover resistance, and selective activity to a commercial Pt/C catalyst in 0.1 m KOH aqueous solution. Such excellent performance benefits from in situ covalent incorporation of Pt nanoparticles with optimal size into N-doped carbon support, dense active catalytic sites on surface, excellent electrical contacts between the catalytic sites and the electron-conducting host, and a favorable mesoporous structure for the stabilization of the Pt nanoparticles by pore confinement and diffusion of oxygen molecules.

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