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

Cattaneo, Stefano, Althahban, Sultan, Freakley, Simon, Meenakshisundaram, Sankar, Davies, Thomas, He, Qian, Dimitratos, Nikolaos, Kiely, Christopher and Hutchings, Graham J. 2019. Synthesis of highly uniform and composition-controlled gold-palladium supported nanoparticles in continuous flow. Nanoscale 17 , pp. 8247-8259. 10.1039/C8NR09917K
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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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: Royal Society of Chemistry
ISSN: 2040-3364
Date of First Compliant Deposit: 9 April 2019
Date of Acceptance: 8 April 2019
Last Modified: 03 Jul 2019 10:00
URI: http://orca.cf.ac.uk/id/eprint/121621

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