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Issue 17, 2019
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Synthesis of highly uniform and composition-controlled gold–palladium supported nanoparticles in continuous flow

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Abstract

The synthesis of supported bimetallic nanoparticles with well-defined size and compositional parameters has long been a challenge. Although batch colloidal methods are commonly used to pre-form metal nanoparticles with the desired size-range in solution, inhomogeneous mixing of the reactant solutions often leads to variations in size, structure and composition from batch-to-batch and even particle-to-particle. Here we describe a millifluidic approach for the production of oxide supported monometallic Au and bimetallic AuPd nanoparticles in a continuous fashion. This optimised method enables the production of nanoparticles with smaller mean sizes, tighter particle size distributions and a more uniform particle-to-particle chemical composition as compared to the conventional batch procedure. In addition, we describe a facile procedure to prepare bimetallic Au@Pd core–shell nanoparticles in continuous flow starting from solutions of the metal precursors. Moreover, the relative ease of scalability of this technique makes the proposed methodology appealing not only for small-scale laboratory purposes, but also for the industrial-scale production of supported metal nanoparticles.

Graphical abstract: Synthesis of highly uniform and composition-controlled gold–palladium supported nanoparticles in continuous flow

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Supplementary files

Article information


Submitted
07 Dec 2018
Accepted
08 Apr 2019
First published
09 Apr 2019

Nanoscale, 2019,11, 8247-8259
Article type
Paper
Author version available

Synthesis of highly uniform and composition-controlled gold–palladium supported nanoparticles in continuous flow

S. Cattaneo, S. Althahban, S. J. Freakley, M. Sankar, T. Davies, Q. He, N. Dimitratos, C. J. Kiely and G. J. Hutchings, Nanoscale, 2019, 11, 8247
DOI: 10.1039/C8NR09917K

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