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Issue 18, 2016
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A balancing act: manipulating reactivity of shape-controlled metal nanocatalysts through bimetallic architecture

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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

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Publication details

The article was received on 18 Nov 2015, accepted on 21 Jan 2016 and first published on 26 Jan 2016


Article type: Paper
DOI: 10.1039/C5TA09368F
Citation: J. Mater. Chem. A, 2016,4, 6911-6918
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    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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