Issue 27, 2022

Optimized colloidal growth of hexagonal close-packed Ag microparticles and their stability under catalytic conditions

Abstract

Crystal phase engineering of metal nano and microparticles is a new and promising route to tune their properties, complementary to their often exploited optimization via size and shape control. Ag microparticles have attracted much attention over the last decades due to their unique properties and their scalability. The colloidal synthesis of allotropic Ag microparticles has already been reported, but detailed knowledge of the synthesis and properties of allotropic Ag microparticles remains limited. In this work, we optimize the formation of hcp Ag via colloidal growth by tuning the chemical reduction kinetics and the surface stabilization through surfactants. The stability of allotropic Ag microparticles was investigated under catalytic conditions. It was shown that hcp Ag microparticles are stable under high pressures of N2, O2 and H2 and in various solvents, but that their thermal stability is limited to 70 °C. These new insights on the stability of allotropic Ag microparticles will serve as a starting point to study the catalytic properties of allotropic Ag microparticles.

Graphical abstract: Optimized colloidal growth of hexagonal close-packed Ag microparticles and their stability under catalytic conditions

Supplementary files

Article information

Article type
Paper
Submitted
19 May 2022
Accepted
18 Jun 2022
First published
20 Jun 2022

New J. Chem., 2022,46, 13352-13361

Optimized colloidal growth of hexagonal close-packed Ag microparticles and their stability under catalytic conditions

M. Gebruers, R. A. Saha, A. V. Kubarev, L. Clinckemalie, Y. Liao, E. Debroye, B. Weng and M. B. J. Roeffaers, New J. Chem., 2022, 46, 13352 DOI: 10.1039/D2NJ02502G

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