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Título:
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Accessing Frustrated Lewis Pair Chemistry through Robust Gold@NDoped Carbon for Selective Hydrogenation of Alkynes
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Autor/a:
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Fiorio, Jhonatan Luiz; Vitalino Gonçalves, Renato; Teixeira-Neto, Erico; Ortuño, Manuel A.; López, Núria; Rossi, Liane Marcia
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Abstract:
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Pyrolysis of Au(OAc)3 in the presence of 1,10-
phenanthroline over TiO2 furnishes a highly active and selective Au
nanoparticle (NP) catalyst embedded in a nitrogen-doped carbon
support, Au@N-doped carbon/TiO2 catalyst. Parameters such as
pyrolysis temperature, type of support, and nitrogen ligands as well
as Au/ligand molar ratios were systematically investigated. Highly
selective hydrogenation of numerous structurally diverse alkynes
proceeded in moderate to excellent yield under mild conditions.
The high selectivity toward the industrially important alkene
substrates, functional group tolerance, and the high recyclability
makes the catalytic system unique. Both high activity and selectivity
are correlated with a frustrated Lewis pairs interface formed by the
combination of gold and nitrogen atoms of N-doped carbon that,
according to density functional theory calculations, can serve as a basic site to promote the heterolytic activation of H2 under very
mild conditions. This “fully heterogeneous” and recyclable gold catalyst makes the selective hydrogenation process
environmentally and economically attractive. |
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Fecha de creación:
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15-03-2018 |
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Materia(s):
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54 |
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Derechos:
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L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by-nc-nd/4.0/ |
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Páginas:
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3516 p. |
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Tipo de documento:
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Artículo
Artículo - Versión aceptada |
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DOI:
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10.1021/acscatal.8b00806
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Compartir:
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