Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 13, Issue 24, Pages 11568-11574Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1cp20761j
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Funding
- DOE-BES [DE-FG02-07ER15895]
- NSF
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A detailed study of electrocatalytic properties of Au@Pt nanoparticles (NPs) as functions of Pt shell packing density and Au core size in terms of CO/methanol oxidation and oxygen reduction reactions is reported here. While most samples studied showed inferior catalytic activities to those of the commercial Pt black that fall reasonably well in a d-band-center up-shift (i.e., stronger surface bonding) regime, the steepest activity recovery trend as manifested by the smallest Au-core samples suggests a plausible transition to a d-band-center down-shift (i.e., weaker surface bonding) regime as the Au core becomes smaller.
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