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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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
Issue number17
Early online date9 Apr 2019
Publication statusPublished - 7 May 2019

ASJC Scopus subject areas

  • Materials Science(all)

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