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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 ORCID: https://orcid.org/0000-0002-7105-0203, Davies, Thomas, He, Qian ORCID: https://orcid.org/0000-0003-4891-3581, Dimitratos, Nikolaos ORCID: https://orcid.org/0000-0002-6620-4335, Kiely, Christopher ORCID: https://orcid.org/0000-0001-5412-0970 and Hutchings, Graham J. ORCID: https://orcid.org/0000-0001-8885-1560 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: 25 Nov 2022 02:26
URI: https://orca.cardiff.ac.uk/id/eprint/121621

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