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Abstract:

Platinum nanoparticles of 3 nm diameter were included in mesoporous silica thin films by controlling the mesopore surface charge with a short polymer brush. This metal-polymer-mesopore nanocomposite presents high catalytic activity toward ammonia oxidation at low temperatures with 4.5% weight platinum loading. An anomalous partial selectivity toward nitrous oxide is observed for the first time, which can be traced back to the synergy of the particles and modified surface. This effect opens a path toward the design of nanocomposite catalysts with highly controlled environments, in which the size- and function-controlled cavities can be tuned in order to lower the reaction barriers. © 2013 American Chemical Society.

Registro:

Documento: Artículo
Título:Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes
Autor:Rafti, M.; Brunsen, A.; Fuertes, M.C.; Azzaroni, O.; Soler-Illia, G.J.A.A.
Filiación:Departamento de Química, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Universidad Nacional de la Plata, La Plata, Buenos Aires, Argentina
Gerencia Química, Comisión Nacional de Energía Atómica, Avenida Gral Paz 1499, B1650KNA San-Martín, Buenos Aires, Argentina
Soft Control, Department of Chemistry, Technische Universität Darmstadt, Petersenstrasse 22, 64287 Darmstadt, Germany
Instituto Sabato, Universidad Nacional de San Martín, San-Martín, Buenos Aires, Argentina
Departamento Química Inorgánica, Universidad de Buenos Aires, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
Palabras clave:ammonia oxidation; gold catalysis; mesoporous films; metal-polymer nanocomposites; nanocatalysis; polymer brushes; Ammonia oxidation; Gold catalysis; Mesoporous films; Metal-polymer nanocomposites; Nanocatalysis; Polymer brushes; Ammonia; Catalyst activity; Dendrimers; Nanocomposites; Nanoparticles; Nitrogen oxides; Platinum
Año:2013
Volumen:5
Número:18
Página de inicio:8833
Página de fin:8840
DOI: http://dx.doi.org/10.1021/am403836f
Título revista:ACS Applied Materials and Interfaces
Título revista abreviado:ACS Appl. Mater. Interfaces
ISSN:19448244
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19448244_v5_n18_p8833_Rafti

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Citas:

---------- APA ----------
Rafti, M., Brunsen, A., Fuertes, M.C., Azzaroni, O. & Soler-Illia, G.J.A.A. (2013) . Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes. ACS Applied Materials and Interfaces, 5(18), 8833-8840.
http://dx.doi.org/10.1021/am403836f
---------- CHICAGO ----------
Rafti, M., Brunsen, A., Fuertes, M.C., Azzaroni, O., Soler-Illia, G.J.A.A. "Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes" . ACS Applied Materials and Interfaces 5, no. 18 (2013) : 8833-8840.
http://dx.doi.org/10.1021/am403836f
---------- MLA ----------
Rafti, M., Brunsen, A., Fuertes, M.C., Azzaroni, O., Soler-Illia, G.J.A.A. "Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes" . ACS Applied Materials and Interfaces, vol. 5, no. 18, 2013, pp. 8833-8840.
http://dx.doi.org/10.1021/am403836f
---------- VANCOUVER ----------
Rafti, M., Brunsen, A., Fuertes, M.C., Azzaroni, O., Soler-Illia, G.J.A.A. Heterogeneous catalytic activity of platinum nanoparticles hosted in mesoporous silica thin films modified with polyelectrolyte brushes. ACS Appl. Mater. Interfaces. 2013;5(18):8833-8840.
http://dx.doi.org/10.1021/am403836f