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Rapid synthesis of supported single metal nanoparticles and effective removal of stabilizing ligands

Trogadas, P; Kapil, N; Angel, GMA; Kuehl, S; Strasser, P; Brett, DJL; Coppens, M-O; (2021) Rapid synthesis of supported single metal nanoparticles and effective removal of stabilizing ligands. Journal of Materials Chemistry A , 9 (43) pp. 24283-24289. 10.1039/d1ta06032e. Green open access

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Abstract

A method is introduced to rapidly (<30 min) synthesize single metal nanoparticles with narrow size distribution in a simple way. It is based on the electrospraying of a metal precursor solution into a surfactant solution, which acts as a reducing and stabilizing agent. This synthesis method is demonstrated for the production of Ag and Au nanoparticles, which are incorporated onto carbonaceous and non-carbonaceous supports. The nanoparticle size depends on the internal diameter of the spraying nozzle. The removal of the stabilizing surfactant (dodecylamine; DDA) is also examined via thermal annealing and oxygen plasma treatments. Thermal annealing at a low temperature rate is found to be the most effective, as it completely removes DDA from the metal nanoparticles without inducing changes in their particle size. To verify that the supported Ag nanoparticles post calcination are surfactant-free and, thus, their surface sites are active, their oxygen reduction reaction (ORR) activity is measured in alkaline media, demonstrating similar values to the ones reported in the literature.

Type: Article
Title: Rapid synthesis of supported single metal nanoparticles and effective removal of stabilizing ligands
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/d1ta06032e
Publisher version: https://doi.org/10.1039/D1TA06032E
Language: English
Additional information: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/)
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10137910
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