Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in water

Autores
Navas, Marisa Belén; Bideberripe, Hernán Pablo; Cabello, Carmen Inés; Gazzoli, Delia; Casella, Mónica Laura; Jaworski, María Angélica
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In the present work, the elimination of NO3-, NO2- and BrO3- in distilled and groundwater samples using H2 as reducing agent is studied. For this purpose, PdCu-based catalysts were prepared on CeO2 pure and modified with 10 % of ZrO2 supports. The prepared catalysts were characterized by N2 physisorption, SEM-EDS, XRD, TPR, RAMAN, FTIR and XPS. The results showed that the materials obtained were mesoporous, exposing the cubic CeO2 crystalline phase. Raman and FTIR analysis allow corroborating that both supports have oxygen vacancies, being higher in the ZrCe support, due to the presence of Zr4+ ions in the CeO2 lattice. All the prepared catalysts were active in the elimination of the selected oxyanions, showing high selectivities (>99 %) towards the product of interest (N2 and Br−), especially the catalyst PdCu/10ZrCe. This catalyst presented the highest oxyanion removal rate, which is higher for NO3− elimination (V0,NO3-: 5.6; V0,BrO3-:.0.93). In the reduction stage, Ce4+ is reduced to Ce3+, generating oxygen vacancies at the metal-support interface. It is postulated that the reduction of the anions occurs by interaction of the oxygen atoms of the NO3−, NO2− or BrO3− species with the oxygen-vacant sites generated. The addition of Zr on ceria support increases its ability to activate anions and reduce them. PdCu/10ZrCe catalyst was also tested using groundwater. The conversion results obtained were promising, 60 % for NO2−, 70 % for NO3− and 27 % for BrO3−.
Centro de Investigación y Desarrollo en Ciencias Aplicadas
Facultad de Ingeniería
Comisión de Investigaciones Científicas de la provincia de Buenos Aires
Materia
Química
CeO2
Nitrite
Bromate
CeO2-ZrO2 support
Nitrate
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/154152

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/154152
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in waterNavas, Marisa BelénBideberripe, Hernán PabloCabello, Carmen InésGazzoli, DeliaCasella, Mónica LauraJaworski, María AngélicaQuímicaCeO2NitriteBromateCeO2-ZrO2 supportNitrateIn the present work, the elimination of NO3-, NO2- and BrO3- in distilled and groundwater samples using H2 as reducing agent is studied. For this purpose, PdCu-based catalysts were prepared on CeO2 pure and modified with 10 % of ZrO2 supports. The prepared catalysts were characterized by N2 physisorption, SEM-EDS, XRD, TPR, RAMAN, FTIR and XPS. The results showed that the materials obtained were mesoporous, exposing the cubic CeO2 crystalline phase. Raman and FTIR analysis allow corroborating that both supports have oxygen vacancies, being higher in the ZrCe support, due to the presence of Zr4+ ions in the CeO2 lattice. All the prepared catalysts were active in the elimination of the selected oxyanions, showing high selectivities (>99 %) towards the product of interest (N2 and Br−), especially the catalyst PdCu/10ZrCe. This catalyst presented the highest oxyanion removal rate, which is higher for NO3− elimination (V0,NO3-: 5.6; V0,BrO3-:.0.93). In the reduction stage, Ce4+ is reduced to Ce3+, generating oxygen vacancies at the metal-support interface. It is postulated that the reduction of the anions occurs by interaction of the oxygen atoms of the NO3−, NO2− or BrO3− species with the oxygen-vacant sites generated. The addition of Zr on ceria support increases its ability to activate anions and reduce them. PdCu/10ZrCe catalyst was also tested using groundwater. The conversion results obtained were promising, 60 % for NO2−, 70 % for NO3− and 27 % for BrO3−.Centro de Investigación y Desarrollo en Ciencias AplicadasFacultad de IngenieríaComisión de Investigaciones Científicas de la provincia de Buenos Aires2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf154-163http://sedici.unlp.edu.ar/handle/10915/154152enginfo:eu-repo/semantics/altIdentifier/issn/0920-5861info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cattod.2020.08.012info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T11:11:55Zoai:sedici.unlp.edu.ar:10915/154152Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 11:11:55.466SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in water
title Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in water
spellingShingle Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in water
Navas, Marisa Belén
Química
CeO2
Nitrite
Bromate
CeO2-ZrO2 support
Nitrate
title_short Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in water
title_full Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in water
title_fullStr Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in water
title_full_unstemmed Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in water
title_sort Use of PdCu catalysts supported on zirconia-ceria based supports for the elimination of oxyanions present in water
dc.creator.none.fl_str_mv Navas, Marisa Belén
Bideberripe, Hernán Pablo
Cabello, Carmen Inés
Gazzoli, Delia
Casella, Mónica Laura
Jaworski, María Angélica
author Navas, Marisa Belén
author_facet Navas, Marisa Belén
Bideberripe, Hernán Pablo
Cabello, Carmen Inés
Gazzoli, Delia
Casella, Mónica Laura
Jaworski, María Angélica
author_role author
author2 Bideberripe, Hernán Pablo
Cabello, Carmen Inés
Gazzoli, Delia
Casella, Mónica Laura
Jaworski, María Angélica
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Química
CeO2
Nitrite
Bromate
CeO2-ZrO2 support
Nitrate
topic Química
CeO2
Nitrite
Bromate
CeO2-ZrO2 support
Nitrate
dc.description.none.fl_txt_mv In the present work, the elimination of NO3-, NO2- and BrO3- in distilled and groundwater samples using H2 as reducing agent is studied. For this purpose, PdCu-based catalysts were prepared on CeO2 pure and modified with 10 % of ZrO2 supports. The prepared catalysts were characterized by N2 physisorption, SEM-EDS, XRD, TPR, RAMAN, FTIR and XPS. The results showed that the materials obtained were mesoporous, exposing the cubic CeO2 crystalline phase. Raman and FTIR analysis allow corroborating that both supports have oxygen vacancies, being higher in the ZrCe support, due to the presence of Zr4+ ions in the CeO2 lattice. All the prepared catalysts were active in the elimination of the selected oxyanions, showing high selectivities (>99 %) towards the product of interest (N2 and Br−), especially the catalyst PdCu/10ZrCe. This catalyst presented the highest oxyanion removal rate, which is higher for NO3− elimination (V0,NO3-: 5.6; V0,BrO3-:.0.93). In the reduction stage, Ce4+ is reduced to Ce3+, generating oxygen vacancies at the metal-support interface. It is postulated that the reduction of the anions occurs by interaction of the oxygen atoms of the NO3−, NO2− or BrO3− species with the oxygen-vacant sites generated. The addition of Zr on ceria support increases its ability to activate anions and reduce them. PdCu/10ZrCe catalyst was also tested using groundwater. The conversion results obtained were promising, 60 % for NO2−, 70 % for NO3− and 27 % for BrO3−.
Centro de Investigación y Desarrollo en Ciencias Aplicadas
Facultad de Ingeniería
Comisión de Investigaciones Científicas de la provincia de Buenos Aires
description In the present work, the elimination of NO3-, NO2- and BrO3- in distilled and groundwater samples using H2 as reducing agent is studied. For this purpose, PdCu-based catalysts were prepared on CeO2 pure and modified with 10 % of ZrO2 supports. The prepared catalysts were characterized by N2 physisorption, SEM-EDS, XRD, TPR, RAMAN, FTIR and XPS. The results showed that the materials obtained were mesoporous, exposing the cubic CeO2 crystalline phase. Raman and FTIR analysis allow corroborating that both supports have oxygen vacancies, being higher in the ZrCe support, due to the presence of Zr4+ ions in the CeO2 lattice. All the prepared catalysts were active in the elimination of the selected oxyanions, showing high selectivities (>99 %) towards the product of interest (N2 and Br−), especially the catalyst PdCu/10ZrCe. This catalyst presented the highest oxyanion removal rate, which is higher for NO3− elimination (V0,NO3-: 5.6; V0,BrO3-:.0.93). In the reduction stage, Ce4+ is reduced to Ce3+, generating oxygen vacancies at the metal-support interface. It is postulated that the reduction of the anions occurs by interaction of the oxygen atoms of the NO3−, NO2− or BrO3− species with the oxygen-vacant sites generated. The addition of Zr on ceria support increases its ability to activate anions and reduce them. PdCu/10ZrCe catalyst was also tested using groundwater. The conversion results obtained were promising, 60 % for NO2−, 70 % for NO3− and 27 % for BrO3−.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cattod.2020.08.012
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