Phosphorus as a promoter of a nickel catalyst to obtain 1-phenylethanol from chemoselective hydrogenation of acetophenone

Two catalysts were prepared using monodisperse pre-synthetized nanoparticles of metallic nickel and nickel phosphides with the same average diameter. Both nanoparticles species were deposited on the same support: mesoporous silica nano-spheres of MCM-41. This support is suitable to inhibit agglomera...

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Detalles Bibliográficos
Autores principales: Costa, Dolly Carolina, Soldati, Analía Leticia, Bengoa, José Fernando, Marchetti, Sergio Gustavo, Vetere, Virginia
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Exactas
Química
Materials chemistry
Organic chemistry
Physical chemistry
Chemical engineering
Materials science
Nanoparticles
Metallic nickel
Nickel phosphides
Hydrogenation
1-Phenylethanol
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/121809
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-121809
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Materials chemistry
Organic chemistry
Physical chemistry
Chemical engineering
Materials science
Nanoparticles
Metallic nickel
Nickel phosphides
Hydrogenation
1-Phenylethanol
spellingShingle Ciencias Exactas
Química
Materials chemistry
Organic chemistry
Physical chemistry
Chemical engineering
Materials science
Nanoparticles
Metallic nickel
Nickel phosphides
Hydrogenation
1-Phenylethanol
Costa, Dolly Carolina
Soldati, Analía Leticia
Bengoa, José Fernando
Marchetti, Sergio Gustavo
Vetere, Virginia
Phosphorus as a promoter of a nickel catalyst to obtain 1-phenylethanol from chemoselective hydrogenation of acetophenone
topic_facet Ciencias Exactas
Química
Materials chemistry
Organic chemistry
Physical chemistry
Chemical engineering
Materials science
Nanoparticles
Metallic nickel
Nickel phosphides
Hydrogenation
1-Phenylethanol
description Two catalysts were prepared using monodisperse pre-synthetized nanoparticles of metallic nickel and nickel phosphides with the same average diameter. Both nanoparticles species were deposited on the same support: mesoporous silica nano-spheres of MCM-41. This support is suitable to inhibit agglomeration and sintering processes during preparation steps. Therefore, two supported and activated catalysts with the same average nanoparticles diameter were obtained. They differ only in the nature of the active species: metallic nickel and nickel phosphides. The effect of the presence of a second element (phosphorus), more electronegative than nickel, on the activity and selectivity in the chemoselective hydrogenation of acetophenone was studied. The reaction conditions were: H₂ pressure of 1 MPa, 80 ºC using n-heptane as solvent. With the aim to understand the catalytic results, nanoparticles, support and catalysts were carefully characterized by X-ray diffraction, diffuse light scattering, transmission electron microcopy, high resolution transmission electron microcopy, selected area electron diffraction, scanning electron microcopy, Fourier transformer infrared spectroscopy, N₂ adsorption at -196 ºC, atomic absorption, H₂ and CO chemisorption and volumetric oxidation. Considering these results and geometric and electronic characteristics of the surface of both active species, a change in the adsorption intermediate state of acetophenone in presence of phosphorus is proposed to explain the hydrogenation chemoselectivity of nickel phospides.
format Articulo
Articulo
author Costa, Dolly Carolina
Soldati, Analía Leticia
Bengoa, José Fernando
Marchetti, Sergio Gustavo
Vetere, Virginia
author_facet Costa, Dolly Carolina
Soldati, Analía Leticia
Bengoa, José Fernando
Marchetti, Sergio Gustavo
Vetere, Virginia
author_sort Costa, Dolly Carolina
title Phosphorus as a promoter of a nickel catalyst to obtain 1-phenylethanol from chemoselective hydrogenation of acetophenone
title_short Phosphorus as a promoter of a nickel catalyst to obtain 1-phenylethanol from chemoselective hydrogenation of acetophenone
title_full Phosphorus as a promoter of a nickel catalyst to obtain 1-phenylethanol from chemoselective hydrogenation of acetophenone
title_fullStr Phosphorus as a promoter of a nickel catalyst to obtain 1-phenylethanol from chemoselective hydrogenation of acetophenone
title_full_unstemmed Phosphorus as a promoter of a nickel catalyst to obtain 1-phenylethanol from chemoselective hydrogenation of acetophenone
title_sort phosphorus as a promoter of a nickel catalyst to obtain 1-phenylethanol from chemoselective hydrogenation of acetophenone
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/121809
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