Adsorbate-induced surface segregation for core-shell nanocatalysts.
Coming to the surface: The surface composition of carbon-supported Pt(3)Co 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.
Lehrstuhl Physikalische Chemie, Technische Universität München, Lichtenbergstrasse 4, 85748 Garching, Germany. karl.mayrhofer@mytum.de
Karl J J
KJ
Mayrhofer
Viktorija
V
Juhart
Katrin
K
Hartl
Marianne
M
Hanzlik
Matthias
M
Arenz