Issue 18, 2016

A balancing act: manipulating reactivity of shape-controlled metal nanocatalysts through bimetallic architecture

Abstract

Manipulating the electronic structure of metal nanocrystals is one way of altering their catalytic activities. This ability is demonstrated here by introducing a Au interior to shape-controlled Pd nanocrystals, producing core@shell Au@Pd nanoparticles with varying shell thicknesses. As revealed by X-ray photoelectron spectroscopy, the electronic structure of the Pd shell depends on its thickness. These core@shell nanocrystals were used to catalyze two model reactions: selective hydrogenation of 2-hexyne and oxidation of formic acid, where different reactivities were found also as a function of shell thickness. The comparison of particles with varying bimetallic architecture but identical geometric features provides insight into how electronic regulation in a catalytic reaction can be achieved. It is concluded that a balance in binding interaction between the molecular substrate and catalyst surface is necessary to design an efficient catalyst and can be achieved with shape-controlled core@shell nanocrystals.

Graphical abstract: A balancing act: manipulating reactivity of shape-controlled metal nanocatalysts through bimetallic architecture

Supplementary files

Article information

Article type
Paper
Submitted
18 ⵏⵓⵡ 2015
Accepted
21 ⵉⵏⵏ 2016
First published
26 ⵉⵏⵏ 2016

J. Mater. Chem. A, 2016,4, 6911-6918

A balancing act: manipulating reactivity of shape-controlled metal nanocatalysts through bimetallic architecture

M. Laskar and S. E. Skrabalak, J. Mater. Chem. A, 2016, 4, 6911 DOI: 10.1039/C5TA09368F

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