Issue 13, 2013

Dodecahedral Au@Pd nanocrystals with high-index facets and excellent electrocatalytic activity and highly efficient surface-enhanced Raman scattering enhancement

Abstract

We synthesize the three-fold symmetric shield-like Au@Pd core–shell nanocrystals, enclosed predominantly by high-index {541} facets with kinks, through the simultaneous reduction of Au and Pd ions in the presence of triangular Au nanocrystal seeds in aqueous solution at room-temperature. The obtained shield-like Au@Pd core–shell nanocrystals exhibit superior electrocatalytic activity for the oxidation of ethanol and unique near-field enhancement property with a highly sensitive surface-enhanced Raman scattering (SERS) response. These excellent properties can be ascribed to the presence of sharp corners and edges as well as high-index faceted Pd-rich shell in the shield-like Au@Pd core–shell structure. We also investigate the mechanism for the formation of three-fold symmetric shield-like Au@Pd core–shell nanocrystals.

Graphical abstract: Dodecahedral Au@Pd nanocrystals with high-index facets and excellent electrocatalytic activity and highly efficient surface-enhanced Raman scattering enhancement

Supplementary files

Article information

Article type
Paper
Submitted
07 Feb 2013
Accepted
24 Apr 2013
First published
25 Apr 2013

Nanoscale, 2013,5, 6074-6080

Dodecahedral Au@Pd nanocrystals with high-index facets and excellent electrocatalytic activity and highly efficient surface-enhanced Raman scattering enhancement

L. Zhang and C. Zhang, Nanoscale, 2013, 5, 6074 DOI: 10.1039/C3NR00695F

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