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Advances in Physical Chemistry
Volume 2011 (2011), Article ID 530397, 16 pages
doi:10.1155/2011/530397
Platinum Monolayer Electrocatalysts for the Oxygen Reduction Reaction: Improvements Induced by Surface and Subsurface Modifications of Cores
Department of Chemistry, Brookhaven National Laboratory, Upton, NY 11973, USA
Received 18 May 2011; Accepted 22 August 2011
Academic Editor: Wolfgang Schmickler
Copyright © 2011 Yun Cai and Radoslav R. Adzic. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
This paper demonstrates that the ORR activity of electrocatalysts can be further improved by the modification of surface and subsurface of the core materials. The removal of surface low-coordination sites, generation (via addition or segregation) of an interlayer between and the core, or the introduction of a second metal component to the subsurface layer of the core can further improve the ORR activity and/or stability of electrocatalysts. These modifications generate the alternation of the interactions between the substrate and the , involving the changes on both electronic (ligand) and geometric (strain) properties of the substrates. The improvements resulted from the application of these approaches provide a new perspective to designing of the new generation electrocatalysts.