Study of the Durability of Faceted Pt3Ni Oxygen–Reduction Electrocatalysts

Authors

  • Jianbo Wu,

    1. University of Rochester, Department of Chemical Engineering, Gavett Hall 206, Rochester, New York 14627 (USA)
    2. University of Illinois at Urbana-Champaign, Department of Chemical and Biomolecular Engineering, 600 S. Mathews Ave, Urbana, Illinois 61801 (USA), Fax: (+1) 217-333-5052
    Search for more papers by this author
  • Prof. Hong Yang

    Corresponding author
    1. University of Rochester, Department of Chemical Engineering, Gavett Hall 206, Rochester, New York 14627 (USA)
    2. University of Illinois at Urbana-Champaign, Department of Chemical and Biomolecular Engineering, 600 S. Mathews Ave, Urbana, Illinois 61801 (USA), Fax: (+1) 217-333-5052
    • University of Rochester, Department of Chemical Engineering, Gavett Hall 206, Rochester, New York 14627 (USA)
    Search for more papers by this author

Abstract

The durability of truncated octahedral Pt3Ni (t,o-Pt3Ni) electrocatalysts in the oxygen–reduction reaction (ORR) was investigated by using an accelerated-durability-testing procedure. The Pt3Ni/C catalyst lost 21 % of its initial electrochemical surface area (ECSA) and 40 % of the mass-current density (0.55 to 0.33 A mgPt−1) after 30 000 potential cycles under acidic conditions. In comparison, the reference commercial Pt/C catalyst lost 44 % of its initial ECSA and had a final mass-specific activity of only 0.09 A mgPt−1 under identical testing conditions. This study shows the potentials of this class of Pt3Ni/C nanostructures as highly active and durable ORR catalysts.

Ancillary