Liquid Phase Hydrogenation of Pharmaceutical Interest Nitroarenes over Gold-Supported Alumina Nanowires Catalysts
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Archivos
Fecha
2020-02
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
MDPI AG
Nombre de Curso
Licencia CC
Licencia CC
Resumen
In this work, Au nanoparticles, supported in Al2O3 nanowires (ANW) modified with
(3-aminopropyl)trimethoxysilane were synthetized, for their use as catalysts in the hydrogenation
reaction of 4-(2-fluoro-4-nitrophenyl)-morpholine and 4-(4-nitrophenyl)morpholin-3-one. ANW was
obtained by hydrothermal techniques and the metal was incorporated by the reduction of the precursor
with NaBH4 posterior to superficial modification. The catalysts were prepared at different metal
loadings and were characterized by different techniques. The characterization revealed structured
materials in the form of nanowires and a successful superficial modification. All catalysts show that
Au is in a reduced state and the shape of the nanoparticles is spherical, with high metal dispersion
and size distributions from 3.7 to 4.6 nm. The different systems supported in modified-ANW were
active and selective in the hydrogenation reaction of both substrates, finding for all catalytic systems
a selectivity of almost 100% to the aromatic amine. Catalytic data showed pseudo first-order kinetics
with respect to the substrate for all experimental conditions used in this work. The solvent plays
an important role in the activity and selectivity of the catalyst, where the highest efficiency and
operational stability was achieved when ethanol was used as the solvent
Notas
Palabras clave
nanowires; gold; nitroarenes; Aluminium oxide
Citación
MaterialsOpen AccessVolume 13, Issue 41 February 2020 Article number 925