Zirconia-Supported Silver Nanoparticles for the Catalytic Combustion of Pollutants Originating from Mobile Sources

This work presents the physicochemical characterization and activity of zirconia-supported silver catalysts for the oxidation of pollutants present in diesel engine exhaust (propane, propene, naphthalene and soot). A series of silver-supported catalysts AgxZ (x = 1, 5 and 10 wt.%, Z = zirconia) were...

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Detalles Bibliográficos
Autores principales: Montaña, Maia, Leguizamón Aparicio, María Silvia del Valle, Ocsachoque, Marco Antonio, Navas, Marisa Belén, Barros, Ivoneide de C. L., Rodriguez-Castellón, Enrique, Casella, Mónica Laura, Lick, Ileana Daniela
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Química
Silver nanoparticles
Zirconia
Hydrocarbons
Diesel soot
Catalytic combustion
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/80684
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-80684
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Silver nanoparticles
Zirconia
Hydrocarbons
Diesel soot
Catalytic combustion
spellingShingle Química
Silver nanoparticles
Zirconia
Hydrocarbons
Diesel soot
Catalytic combustion
Montaña, Maia
Leguizamón Aparicio, María Silvia del Valle
Ocsachoque, Marco Antonio
Navas, Marisa Belén
Barros, Ivoneide de C. L.
Rodriguez-Castellón, Enrique
Casella, Mónica Laura
Lick, Ileana Daniela
Zirconia-Supported Silver Nanoparticles for the Catalytic Combustion of Pollutants Originating from Mobile Sources
topic_facet Química
Silver nanoparticles
Zirconia
Hydrocarbons
Diesel soot
Catalytic combustion
description This work presents the physicochemical characterization and activity of zirconia-supported silver catalysts for the oxidation of pollutants present in diesel engine exhaust (propane, propene, naphthalene and soot). A series of silver-supported catalysts AgxZ (x = 1, 5 and 10 wt.%, Z = zirconia) were prepared, which were studied by various characterization techniques. The results show that silver is mainly found under the form of small metal nanoparticles (<10 nm) dispersed over the support. The metallic phase coexists with the AgOx oxidic phases. Silver is introduced onto the zirconia, generating Ag–ZrO2 catalysts with high activity for the oxidation of propene and naphthalene. These catalysts also show some activity for soot combustion. Silver species can contribute with zirconia in the catalytic redox cycle, through a synergistic effect, providing sites that facilitate the migration and availability of oxygen, which is favored by the presence of structural defects. This is a novel application of the AgOx–Ag/ZrO2 system in the combustion reaction of propene and naphthalene. The results are highly promising, given that the T50 values found for both model molecules are quite low.
format Articulo
Articulo
author Montaña, Maia
Leguizamón Aparicio, María Silvia del Valle
Ocsachoque, Marco Antonio
Navas, Marisa Belén
Barros, Ivoneide de C. L.
Rodriguez-Castellón, Enrique
Casella, Mónica Laura
Lick, Ileana Daniela
author_facet Montaña, Maia
Leguizamón Aparicio, María Silvia del Valle
Ocsachoque, Marco Antonio
Navas, Marisa Belén
Barros, Ivoneide de C. L.
Rodriguez-Castellón, Enrique
Casella, Mónica Laura
Lick, Ileana Daniela
author_sort Montaña, Maia
title Zirconia-Supported Silver Nanoparticles for the Catalytic Combustion of Pollutants Originating from Mobile Sources
title_short Zirconia-Supported Silver Nanoparticles for the Catalytic Combustion of Pollutants Originating from Mobile Sources
title_full Zirconia-Supported Silver Nanoparticles for the Catalytic Combustion of Pollutants Originating from Mobile Sources
title_fullStr Zirconia-Supported Silver Nanoparticles for the Catalytic Combustion of Pollutants Originating from Mobile Sources
title_full_unstemmed Zirconia-Supported Silver Nanoparticles for the Catalytic Combustion of Pollutants Originating from Mobile Sources
title_sort zirconia-supported silver nanoparticles for the catalytic combustion of pollutants originating from mobile sources
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/80684
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