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

Research output: Contribution to journalArticlepeer-review

32 Citations (SciVal)
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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

Funding

We would like to thank MaxNet Energy for financial support and the Cardiff Electron Microscopy unit for use of facilities. CJK gratefully acknowledges funding from the National Science Foundation Major Research Instrumentation program (GR# MRI/DMR-1040229). SMA thanks the Saudi Arabian government for his PhD scholarship.

ASJC Scopus subject areas

  • General Materials Science

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