Issue 32, 2019

Kinetically-controlled laser-synthesis of colloidal high-entropy alloy nanoparticles

Abstract

The single-step incorporation of multiple immiscible elements into colloidal high-entropy alloy (HEA) nanoparticles has manifold technological potential, but it continues to be a challenge for state-of-the-art synthesis methods. Hence, the development of a synthesis approach by which the chemical composition and phase of colloidal HEA nanoparticles can be controlled could lead to a new pool of nanoalloys with unparalleled functionalities. Herein, this study reports the single-step synthesis of colloidal CoCrFeMnNi HEA nanoparticles with targeted equimolar stoichiometry and diameters less than 5 nm by liquid-phase, ultrashort-pulsed laser ablation of the consolidated and heat-treated micropowders of the five constituent metals. Further, the scalability of the process with an unprecedented productivity of 3 grams of colloidal HEA nanoparticles per hour is demonstrated. Electrochemical analysis reveals a unique redox behavior of the particles' surfaces in an alkaline environment and a potential for future application as a heterogeneous catalyst for the oxygen evolution reaction.

Graphical abstract: Kinetically-controlled laser-synthesis of colloidal high-entropy alloy nanoparticles

  • This article is part of the themed collection: Graphene

Supplementary files

Article information

Article type
Paper
Submitted
01 Mai 2019
Accepted
29 Mai 2019
First published
12 Jun 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 18547-18558

Kinetically-controlled laser-synthesis of colloidal high-entropy alloy nanoparticles

F. Waag, Y. Li, A. R. Ziefuß, E. Bertin, M. Kamp, V. Duppel, G. Marzun, L. Kienle, S. Barcikowski and B. Gökce, RSC Adv., 2019, 9, 18547 DOI: 10.1039/C9RA03254A

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