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Highly stable Pt monolayer on PdAu nanoparticle electrocatalysts for the oxygen reduction reaction

Author

Listed:
  • Kotaro Sasaki

    (Brookhaven National Laboratory, Building 555, Upton, New York 11973-5000, USA.)

  • Hideo Naohara

    (Toyota Motor Corporation)

  • YongMan Choi

    (Brookhaven National Laboratory, Building 555, Upton, New York 11973-5000, USA.
    Present address: Chemical Catalysis, SABIC Technology Center, Riyadh, 11551, Saudi Arabia.)

  • Yun Cai

    (Brookhaven National Laboratory, Building 555, Upton, New York 11973-5000, USA.)

  • Wei-Fu Chen

    (Brookhaven National Laboratory, Building 555, Upton, New York 11973-5000, USA.)

  • Ping Liu

    (Brookhaven National Laboratory, Building 555, Upton, New York 11973-5000, USA.)

  • Radoslav R. Adzic

    (Brookhaven National Laboratory, Building 555, Upton, New York 11973-5000, USA.)

Abstract

Stability is one of the main requirements for commercializing fuel cell electrocatalysts for automotive applications. Platinum is the best-known catalyst for oxygen reduction in cathodes, but it undergoes dissolution during potential changes while driving electric vehicles, thus hampering commercial adoption. Here we report a new class of highly stable, active electrocatalysts comprising platinum monolayers on palladium–gold alloy nanoparticles. In fuel-cell tests, this electrocatalyst with its ultra-low platinum content showed minimal degradation in activity over 100,000 cycles between potentials 0.6 and 1.0 V. Under more severe conditions with a potential range of 0.6–1.4 V, again we registered no marked losses in platinum and gold despite the dissolution of palladium. These data coupled with theoretical analyses demonstrated that adding a small amount of gold to palladium and forming highly uniform nanoparticle cores make the platinum monolayer electrocatalyst significantly tolerant and very promising for the automotive application of fuel cells.

Suggested Citation

  • Kotaro Sasaki & Hideo Naohara & YongMan Choi & Yun Cai & Wei-Fu Chen & Ping Liu & Radoslav R. Adzic, 2012. "Highly stable Pt monolayer on PdAu nanoparticle electrocatalysts for the oxygen reduction reaction," Nature Communications, Nature, vol. 3(1), pages 1-9, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms2124
    DOI: 10.1038/ncomms2124
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