Toward New Fuel Cell Support Materials: A Theoretical and Experimental Study of Nitrogen-Doped Graphene

Authors

  • Dr. Min Ho Seo,

    1. Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 711-873 (Republic of Korea), Fax: (+82) 53-785-6409
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  • Dr. Sung Mook Choi,

    1. Surface Technology Division, Korea Institute of Materials Science (KIMS), Changwon 641-010 (Republic of Korea)
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  • Eun Ja Lim,

    1. School of Materials Science and Engineering, Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology (GIST), Gwangju, 500-712 (Republic of Korea), Fax: (+82)-62-715-2304
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  • In Hye Kwon,

    1. Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 711-873 (Republic of Korea), Fax: (+82) 53-785-6409
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  • Joon Kyo Seo,

    1. Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 711-873 (Republic of Korea), Fax: (+82) 53-785-6409
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  • Seung Hyo Noh,

    1. Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259-G1-5 Nagatsuta, Midori-ku, Yokohama, 226-8502 (Japan)
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  • Prof. Won Bae Kim,

    Corresponding author
    1. School of Materials Science and Engineering, Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology (GIST), Gwangju, 500-712 (Republic of Korea), Fax: (+82)-62-715-2304
    • Won Bae Kim, School of Materials Science and Engineering, Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology (GIST), Gwangju, 500-712 (Republic of Korea), Fax: (+82)-62-715-2304

      Byungchan Han, Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 711-873 (Republic of Korea), Fax: (+82) 53-785-6409

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  • Prof. Byungchan Han

    Corresponding author
    1. Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 711-873 (Republic of Korea), Fax: (+82) 53-785-6409
    • Won Bae Kim, School of Materials Science and Engineering, Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology (GIST), Gwangju, 500-712 (Republic of Korea), Fax: (+82)-62-715-2304

      Byungchan Han, Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 711-873 (Republic of Korea), Fax: (+82) 53-785-6409

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Abstract

Nano-scale Pt particles are often reported to be more electrochemically active and stable in a fuel cell if properly displaced on support materials; however, the factors that affect their activity and stability are not well understood. We applied first-principles calculations and experimental measurements to well-defined model systems of N-doped graphene supports (N-GNS) to reveal the fundamental mechanisms that control the catalytic properties and structural integrity of nano-scale Pt particles. DFT calculations predict thermodynamic and electrochemical interactions between N-GNS and Pt nanoparticles in the methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR). Moreover, the dissolution potentials of the Pt nanoparticles supported on GNS and N-GNS catalysts are calculated under acidic conditions. Our results provide insight into the design of new support materials for enhanced catalytic efficiency and long-term stability.

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