Concepedia

Adsorbate‐Induced Surface Segregation for Core–Shell Nanocatalysts

Karl J. J. Mayrhofer, Viktorija Juhart, Katrin Hartl, Marianne Hanzlik, Matthias Arenz

Angewandte Chemie International Edition · 2009 · 319 citations · 17 references

DOI

Concepts

Abstract

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.

References

17

Improved Oxygen Reduction Activity on Pt <sub>3</sub> Ni(111) via Increased Surface Site Availability

Vojislav R. Stamenković, Ben Fowler, Bongjin Simon Mun et al. · Science · 2007 · 4.4K citations

, , +17

Formation of hollow nanocrystals through the nanoscale kirkendall \neffect

Yadong Yin, Robert M. Rioux, Can K. Erdonmez et al. · eScholarship (California Digital Library) · 2004 · 3.5K citations

, , +17

Trends in electrocatalysis on extended and nanoscale Pt-bimetallic alloy surfaces

Vojislav R. Stamenković, Bongjin Simon Mun, Matthias Arenz et al. · Nature Materials · 2007 · 3.2K citations

, , +12

The Effect of the Particle Size on the Kinetics of CO Electrooxidation on High Surface Area Pt Catalysts

Matthias Arenz, Karl J. J. Mayrhofer, Vojislav R. Stamenković et al. · Journal of the American Chemical Society · 2005 · 555 citations

, , +17

Enhancement of the electrocatalytic O2 reduction on Pt–Fe alloys

Takako Toda, Hiroshi Igarashi, Masahiro Watanabe · Journal of Electroanalytical Chemistry · 1999 · 429 citations

, , +14