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Adsorbate‐Induced Surface Segregation for Core–Shell Nanocatalysts |
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| Authors: | Karl J J Mayrhofer Dr Viktorija Juhart Katrin Hartl Marianne Hanzlik Dr Matthias Arenz Dr |
| Institution: | 1. Lehrstuhl Physikalische Chemie, Technische Universit?t München, Lichtenbergstrasse 4, 85748 Garching (Germany), Fax: (+49)?89‐289‐13389;2. Institut für Elektronenmikroskopie, Technische Universit?t München, Lichtenbergstrasse 4, 85748 Garching (Germany) |
| 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.  |
| Keywords: | core– shell nanoparticles fuel cells supported catalysis oxygen reduction surface segregation |