Get access

Nitrogen-Doped Pt/C Electrocatalysts with Enhanced Activity and Stability toward the Oxygen Reduction Reaction

Authors

  • Dr. Sang-Il Choi,

    1. Department of Chemistry and KI for the NanoCentury, Korean Advanced Institute of Science and Technology (KAIST), Daejeon 305-701 (Republic of Korea)
    Search for more papers by this author
    • These authors contributed equally to this work.

  • Su-Un Lee,

    1. Department of Chemistry and KI for the NanoCentury, Korean Advanced Institute of Science and Technology (KAIST), Daejeon 305-701 (Republic of Korea)
    Search for more papers by this author
    • These authors contributed equally to this work.

  • Ran Choi,

    1. Department of Chemistry and KI for the NanoCentury, Korean Advanced Institute of Science and Technology (KAIST), Daejeon 305-701 (Republic of Korea)
    Search for more papers by this author
  • Dr. Joon T. Park,

    1. Department of Chemistry and KI for the NanoCentury, Korean Advanced Institute of Science and Technology (KAIST), Daejeon 305-701 (Republic of Korea)
    Search for more papers by this author
  • Prof. Dr. Sang Woo Han

    Corresponding author
    1. Department of Chemistry and KI for the NanoCentury, Korean Advanced Institute of Science and Technology (KAIST), Daejeon 305-701 (Republic of Korea)
    2. Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Republic of Korea)
    • Department of Chemistry and KI for the NanoCentury, Korean Advanced Institute of Science and Technology (KAIST), Daejeon 305-701 (Republic of Korea)

    Search for more papers by this author

Abstract

Recently, nitrogen-doped carbon materials have proved to be effective catalytic platforms for the oxygen reduction reaction (ORR). Despite the recent synthetic advances for the preparation of nitrogen-incorporated carbon materials, the low-temperature and water-based synthesis of nitrogen-doped carbon materials has rarely been explored due to the difficulties in nitrogen-doping under such mild conditions. Here, nitrogen-doped Pt/C (Pt/NC) catalysts are prepared using a facile, low-temperature, aqueous-phase method. Hydrazine treatment of a Pt/C catalyst successfully yields Pt/NC with controlled nitrogen content. The as-prepared Pt/NC catalysts exhibit enhanced electrocatalytic activity and stability toward ORR in comparison to nitrogen-free Pt/C, and their ORR activities are highly dependent on the level of nitrogen-doping. The Pt/NC catalyst containing 2.0 at % nitrogen results in the largest improvement of ORR activity.

Ancillary