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Adsorbate-Induced Surface Segregation for Core–Shell Nanocatalysts

Authors


  • This work was supported by the DFG through the Emmy-Noether project ARE852/1-1. K.M. thanks the Austrian FWF for an Erwin-Schrödinger Scholarship. We thank Dr. T. Tada from Tanaka Kikinzoku Kogyo for the supply of the catalyst.

Abstract

Coming to the surface: The surface composition of carbon-supported Pt3Co catalyst particles changes upon a CO-annealing treatment. Platinum atoms segregate to the particle surface so that nanoparticles with a platinum shell surrounding an alloy core are formed. This modified catalyst has a superior activity in the oxygen reduction reaction compared to both a plain platinum catalyst and the untreated alloy particles.

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