Design of Glycerol-Based Solvents for the Immobilization of Palladium Nanocatalysts: A Hydrogenation Study

• Published in: ACS sustainable chemistry & engineering Vol. 9; no. 19; pp. 6875 - 6885
• Main Authors: Leal-Duaso, Alejandro, Favier, Isabelle, Pla, Daniel, Pires, Elísabet, Gómez, Montserrat
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 17.05.2021
• Subjects: Chemical Sciences; palladium nanoparticles; catalysis; DES; glycerol ethers; hydrogenation; Green solvents
• ISSN: 2168-0485; 2168-0485
• DOI: 10.1021/acssuschemeng.1c01694

Twenty-one green solvents, including glycerol-derived ethers, and their eutectic mixtures with two renewable ammonium salts, were used for the straightforward synthesis, stabilization, and immobilization of palladium nanoparticles (Pd NPs). The nature of the solvent allows tuning of the characteristics and properties of resulting catalytic systems in terms of particle size and morphology, stability, reactivity, and recoverability. Pd NPs immobilized in glycerol-based solvents were applied in the catalytic hydrogenation of alkenes, alkynes, and carbonyl compounds, as well as in the selective semihydrogenation of alkynes to alkenes. The optimal experimental parameters and the influence on the reactivity of the physicochemical properties of solvent, mainly the viscosity, were studied. Moreover, the most active and recoverable catalytic system, Pd NPs/N00Cl-100, was fully characterized both in the liquid phase and in the solid state, and its deactivation upon recovery was analyzed.