Mechanochemical Strategies for the Preparation of SiO 2 -Supported AgAu Nanoalloy Catalysts.

Autor: da Silva RTP; Institute of Chemistry, University of São Paulo - USP, São Paulo, Brazil., Córdoba De Torresi SI; Institute of Chemistry, University of São Paulo - USP, São Paulo, Brazil., de Oliveira PFM; Institute of Chemistry, University of São Paulo - USP, São Paulo, Brazil.
Jazyk: angličtina
Zdroj: Frontiers in chemistry [Front Chem] 2022 Feb 02; Vol. 10, pp. 836597. Date of Electronic Publication: 2022 Feb 02 (Print Publication: 2022).
DOI: 10.3389/fchem.2022.836597
Abstrakt: Silver-gold nanoalloys were prepared from their metal salts precursors through bottom-up mechanochemical synthesis, using one-pot or galvanic replacement reaction strategies. The nanostructures were prepared over amorphous SiO 2 as an inert supporting material, facilitating their stabilization without the use of any stabilizing agent. The nanomaterials were extensively characterized, confirming the formation of the bimetallic nanostructures. The nanoalloys were tested as catalysts in the hydrogenation of 2-nitroaniline and exhibited up to 4-fold the rate constant and up to 37% increased conversion compared to the respective single metal nanoparticles. Our approach is advantageous to produce nanoparticles with clean surfaces with available catalytic sites, directly in the solid-state and in an environmentally friendly manner.
Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
(Copyright © 2022 da Silva, Córdoba De Torresi and de Oliveira.)
Databáze: MEDLINE
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