Author, as appears in the article.: Garg G; Masdeu-Bultó AM; Farfán N; Ordóñez-Hernández J; Gómez M; Medina-González Y
Department: Química Física i Inorgànica
e-ISSN: 2574-0970
URV's Author/s: Masdeu Bultó, Anna Maria
Project code: CTQ2016-75016-R
Keywords: Scco extraction 2 Palladium nanoparticles Microviscosity Hydrogenation Fluorescent molecular rotors Diffusion Des Co 2
Abstract: © 2020 The Authors. Published by American Chemical Society. In this work, the influence of carbon dioxide on the synthesis of palladium nanoparticles (PdNPs) in glycerol/ionic liquid mixtures and their further applications in catalytic hydrogenations was studied. In the glycerol/choline tosylalaninate/CO2 medium, small and very well-dispersed metal nanoparticles were obtained (1.3 ± 0.3 nm), exhibiting a relative narrow size distribution. Palladium nanoparticles prepared in the presence of supercritical carbon dioxide (scCO2) showed higher catalytic reactivity in comparison with those prepared in its absence. In addition, we observed a beneficial effect of CO2 in the studied hydrogenations. With the aim of rationalizing this trend, measurements of viscosity of the solvent media were carried out by using fluorescent molecular rotors, allowing the determination of diffusion coefficients for the organic substrates and molecular hydrogen. This study evidenced that CO2 causes a decrease of the viscosity of the medium and an increase of the diffusion constants of reagents including H2; consequently, PdNPs in the glycerol/choline tosylalaninate/CO2 solvent showed enhanced catalytic activity. From both process engineering and environmental points of view, it is important to highlight the efficiency of the extraction of organic products from the catalytic glycerol/ionic liquid solution by scCO2.
Thematic Areas: Nanoscience & nanotechnology Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) General materials science
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: annamaria.masdeu@urv.cat
Author identifier: 0000-0001-7938-3902
Record's date: 2024-07-27
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://pubs.acs.org/doi/10.1021/acsanm.0c02706
Funding program: PROGRAMA ESTATAL DE INVESTIGACIÓN, DESARROLLO E INNOVACIÓN ORIENTADA A LOS RETOS DE LA SOCIEDAD
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Acs Applied Nano Materials. 3 (12): 12240-12249
APA: Garg G; Masdeu-Bultó AM; Farfán N; Ordóñez-Hernández J; Gómez M; Medina-González Y (2020). Palladium Nanoparticles in Glycerol/Ionic Liquid/Carbon Dioxide Medium as Hydrogenation Catalysts. Acs Applied Nano Materials, 3(12), 12240-12249. DOI: 10.1021/acsanm.0c02706
Acronym: ECO2VALCAT
Article's DOI: 10.1021/acsanm.0c02706
Entity: Universitat Rovira i Virgili
Journal publication year: 2020
Funding program action: VALORIZACION EFICIENTE DE CO2 A COMBUSTIBLES Y COMPUESTOS DE ALTO VALOR AÑADIDO MEDIANTE CATALISIS HOMOGENEA Y NANO-CATALISIS
Publication Type: Journal Publications
Repositori URV