Issue 27, 2022

Colloidal synthesis of nanoparticles: from bimetallic to high entropy alloys

Abstract

At the nanoscale, the synthesis of a random alloy (i.e. without phase segregation, whatever the composition) by chemical synthesis remains a difficult task, even for simple binary type systems. In this context, a unique approach based on the colloidal route is proposed enabling the synthesis of face-centred cubic and monodisperse bimetallic, trimetallic, tetrametallic and pentametallic nanoparticles with diameters around 5 nm as solid solutions. The Fe–Co–Ni–Pt–Ru alloy (and its subsets) is considered a challenging task as each element has fairly different physico-chemical properties. Particles are prepared by temperature-assisted co-reduction of metal acetylacetonate precursors in the presence of surfactants. It is highlighted how the correlation between precursors’ degradation temperatures and reduction potential values of the metal cations is the driving force to achieve a homogeneous distribution of all elements within the nanoparticles.

Graphical abstract: Colloidal synthesis of nanoparticles: from bimetallic to high entropy alloys

Supplementary files

Article information

Article type
Paper
Submitted
05 Mei 2022
Accepted
03 Jun. 2022
First published
07 Jun. 2022

Nanoscale, 2022,14, 9832-9841

Colloidal synthesis of nanoparticles: from bimetallic to high entropy alloys

C. Moreira Da Silva, H. Amara, F. Fossard, A. Girard, A. Loiseau and V. Huc, Nanoscale, 2022, 14, 9832 DOI: 10.1039/D2NR02478K

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