Directing Energy Flow in Core–Shell Nanostructures for Efficient Plasmon-Enhanced Electrocatalysis

Conjugating plasmonic metals with catalytically active materials with controlled configurations can harness their light energy harvesting ability in catalysis. Herein, we present a well-defined core–shell nanostructure composed of an octahedral Au nanocrystal core and a PdPt alloy shell as a bifunct...

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Bibliographic Details
Published in:Nano letters 2023-03, Vol.23 (5), p.1774-1780
Main Authors: Jung, Hayoon, Kwon, Yongmin, Kim, Yonghyeon, Ahn, Hochan, Ahn, Hojin, Wy, Younghyun, Han, Sang Woo
Format: Article
Language:English
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Summary:Conjugating plasmonic metals with catalytically active materials with controlled configurations can harness their light energy harvesting ability in catalysis. Herein, we present a well-defined core–shell nanostructure composed of an octahedral Au nanocrystal core and a PdPt alloy shell as a bifunctional energy conversion platform for plasmon-enhanced electrocatalysis. The prepared Au@PdPt core–shell nanostructures exhibited significant enhancements in electrocatalytic activity for methanol oxidation and oxygen reduction reactions under visible-light irradiation. Our experimental and computational studies revealed that the electronic hybridization of Pd and Pt allows the alloy material to have a large imaginary dielectric function, which can efficiently induce the shell-biased distribution of plasmon energy upon illumination and, hence, its relaxation at the catalytically active region to promote electrocatalysis.
ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.2c04544