Issue 16, 2014

One-pot synthesis of Au@Pd core–shell nanocrystals with multiple high- and low-index facets and their high electrocatalytic performance

Abstract

Bimetallic nanocrystals (NCs) enclosed by high-surface energy facets have been of enormous interest due to their pronounced catalytic performance in numerous chemical and electrochemical reactions. However, it remains a significant challenge to develop a facile method to synthesize bimetallic NCs with high-surface energy facets in the form of finely tuned structures due to the difficulties in manipulating the nucleation and growth kinetics of NCs in the presence of multiple metal precursors. In the present work, a facile one-pot aqueous synthesis method is developed for the production of bimetallic Au@Pd core–shell NCs with an unusual truncated hexoctahedral (THOH) shape without pre-synthesized seeds. The THOH Au@Pd NCs are bound by multiple high- and low-index facets. The formation of this unique structure is realized through co-reduction of Au and Pd precursors under precisely controlled kinetic conditions. The prepared THOH NCs exhibit a prominent electrocatalytic performance for ethanol oxidation, which is attributed to their characteristic structural features. This study significantly expands the understanding of NC growth and will lead to fabricating novel nanomaterials with desired morphologies and functions.

Graphical abstract: One-pot synthesis of Au@Pd core–shell nanocrystals with multiple high- and low-index facets and their high electrocatalytic performance

Supplementary files

Article information

Article type
Paper
Submitted
15 Apr 2014
Accepted
16 Jun 2014
First published
18 Jun 2014

Nanoscale, 2014,6, 9798-9805

One-pot synthesis of Au@Pd core–shell nanocrystals with multiple high- and low-index facets and their high electrocatalytic performance

Y. Park, Y. W. Lee, S. W. Kang and S. W. Han, Nanoscale, 2014, 6, 9798 DOI: 10.1039/C4NR02034K

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