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

Stefano Cattaneo, Sultan Althahban, Simon J. Freakley, Meenakshisundaram Sankar, Thomas Davies, Qian He, Nikolaos Dimitratos, Christopher J. Kiely, Graham J. Hutchings

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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.

Original languageEnglish
Pages (from-to)8247-8259
Number of pages13
JournalNanoscale
Volume11
Issue number17
Early online date9 Apr 2019
DOIs
Publication statusPublished - 7 May 2019

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

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

In: Nanoscale, Vol. 11, No. 17, 07.05.2019, p. 8247-8259.

Research output: Contribution to journalArticle

Cattaneo, S, Althahban, S, Freakley, SJ, Sankar, M, Davies, T, He, Q, Dimitratos, N, Kiely, CJ & Hutchings, GJ 2019, 'Synthesis of highly uniform and composition-controlled gold-palladium supported nanoparticles in continuous flow', Nanoscale, vol. 11, no. 17, pp. 8247-8259. https://doi.org/10.1039/c8nr09917k
Cattaneo, Stefano ; Althahban, Sultan ; Freakley, Simon J. ; Sankar, Meenakshisundaram ; Davies, Thomas ; He, Qian ; Dimitratos, Nikolaos ; Kiely, Christopher J. ; Hutchings, Graham J. / Synthesis of highly uniform and composition-controlled gold-palladium supported nanoparticles in continuous flow. In: Nanoscale. 2019 ; Vol. 11, No. 17. pp. 8247-8259.
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