C-Heterogenized Re Nanoparticles as Effective Catalysts for the Reduction of 4-Nitrophenol and Oxidation of 1-Phenylethanol

Autor:	Ana Paula Da Costa Ribeiro, Luisa Martins, Armando Pombeiro, Rute Faustino, Beatriz Santos
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	microwaves rhenium catalysis oxidation nanoparticle graphene activated carbon 1-phenylethanol reduction 4-nitrophenol Physical and Theoretical Chemistry Catalysis
Zdroj:	Catalysts; Volume 12; Issue 3; Pages: 285
ISSN:	2073-4344
DOI:	10.3390/catal12030285
Popis:	Rhenium nanoparticles (Re NPs) supported on Norit (activated carbon—C) and graphene (G) were prepared by a solvothermal method under microwave irradiation (MW). The synthesised heterogeneous catalysts were characterised and tested as reduction and oxidation catalysts, highlighting their dual catalytic behaviour. In the first case, they were used, for the first time, to reduce 4-nitrophenol, in aqueous medium, under MW irradiation. Re catalysts were easily recovered by centrifugation and recycled up to six times without significant activity loss. However, the same Re catalysts in MW-assisted oxidation of 1-phenylethanol with no added solvent experienced a significant loss of activity when recycled. The higher activity of the rhenium nanoparticles supported on graphene (Re/G) catalyst in both reactions was assigned to the higher dispersion and smaller particle size of Re NPs when graphene is the support.
Databáze:	OpenAIRE
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