Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 12, Issue 9, Pages 1161-1164Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2010.06.007
Keywords
Pt3Co; Durability; PEMFC; ORR; Pt-skeleton; Pt-skin
Categories
Funding
- French National Research Agency [ANR-07-PANH-008-03]
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Pt3Co/C electrocatalysts are not stable when operated in real PEMFC conditions but face variations of their chemical composition. The latter signs that Co atoms can segregate from the bulk to the surface of the nanoparticles, which we believe is activated by the formation of surface oxides and the leaching of Co at the surface. Consequently, the alloyed Pt3Co/C nanoparticles slowly evolve towards Pt shell/Pt-Co alloy core structures with depleted Co content and a Pt-enriched shell. (C) 2010 Elsevier B.V. All rights reserved.
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