An analysis of the first steps of phenol adsorption-oxidation over coprecipitated Mn–Ce catalysts: a DRIFTS study
- Autores
- D'Alessandro, Oriana; Thomas, Horacio Jorge; Sambeth, Jorge Enrique
- Año de publicación
- 2012
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- A series of Mn–Ce(M) solids (M = K or Na), with molar ratios 100–0, 50–50 and 0–100 were prepared by co-precipitation of manganese and cerium nitrate from NaOH or KOH solutions at pH = 11. In addition, part of the solids precipitated with NaOH were dried and impregnated with a Cu²⁺ salt. The solids were characterized by XRD, Specific Surface Area, XPS and EDS. The characterization analyses show the formation of Mn mixed oxides with different oxidation states (Mn³⁺, Mn⁴⁺), for samples without Ce or Mn–Ce(M) 50–50. In the latter solid and in the one where there is no Mn, the formation of CeO₂ (fluorite type) was detected. The samples were tested in the phenol removal in water at 100 °C and at atmospheric pressure with the aim to analyze the adsorbed species in the first stage of the adsorption-oxidation mechanisms. The results indicate, on the one hand, that [MnOₓ] is the active species in the process and that the most active solids are those that present (i) a higher concentration of OI, (ii) a higher amount of Mn⁴⁺ ions. DRIFT spectroscopy showed a possible mechanism of phenol adsorption on two sites, in the first one by H interaction of OH (phenol) with an OH of the catalyst and in the second, by the formation of a phenolate species between an O (OH phenol) and Mnⁿ⁺.
Centro de Investigación y Desarrollo en Ciencias Aplicadas
Planta Piloto Multipropósito - Laboratorio de Servicios a la Industria y al Sistema Científico - Materia
-
Ciencias Exactas
Química
Mn–Ce composite
Phenol oxidation
Phenolate
Carboxylate
Monodentate phenoxy group - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/136851
Ver los metadatos del registro completo
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An analysis of the first steps of phenol adsorption-oxidation over coprecipitated Mn–Ce catalysts: a DRIFTS studyD'Alessandro, OrianaThomas, Horacio JorgeSambeth, Jorge EnriqueCiencias ExactasQuímicaMn–Ce compositePhenol oxidationPhenolateCarboxylateMonodentate phenoxy groupA series of Mn–Ce(M) solids (M = K or Na), with molar ratios 100–0, 50–50 and 0–100 were prepared by co-precipitation of manganese and cerium nitrate from NaOH or KOH solutions at pH = 11. In addition, part of the solids precipitated with NaOH were dried and impregnated with a Cu²⁺ salt. The solids were characterized by XRD, Specific Surface Area, XPS and EDS. The characterization analyses show the formation of Mn mixed oxides with different oxidation states (Mn³⁺, Mn⁴⁺), for samples without Ce or Mn–Ce(M) 50–50. In the latter solid and in the one where there is no Mn, the formation of CeO₂ (fluorite type) was detected. The samples were tested in the phenol removal in water at 100 °C and at atmospheric pressure with the aim to analyze the adsorbed species in the first stage of the adsorption-oxidation mechanisms. The results indicate, on the one hand, that [MnOₓ] is the active species in the process and that the most active solids are those that present (i) a higher concentration of O<sub>I</sub>, (ii) a higher amount of Mn⁴⁺ ions. DRIFT spectroscopy showed a possible mechanism of phenol adsorption on two sites, in the first one by H interaction of OH (phenol) with an OH of the catalyst and in the second, by the formation of a phenolate species between an O (OH phenol) and Mnⁿ⁺.Centro de Investigación y Desarrollo en Ciencias AplicadasPlanta Piloto Multipropósito - Laboratorio de Servicios a la Industria y al Sistema Científico2012-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf295-309http://sedici.unlp.edu.ar/handle/10915/136851enginfo:eu-repo/semantics/altIdentifier/issn/1878-5190info:eu-repo/semantics/altIdentifier/issn/1878-5204info:eu-repo/semantics/altIdentifier/doi/10.1007/s11144-012-0470-0info: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:UNLP2025-09-03T11:04:08Zoai:sedici.unlp.edu.ar:10915/136851Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 11:04:08.558SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
An analysis of the first steps of phenol adsorption-oxidation over coprecipitated Mn–Ce catalysts: a DRIFTS study |
title |
An analysis of the first steps of phenol adsorption-oxidation over coprecipitated Mn–Ce catalysts: a DRIFTS study |
spellingShingle |
An analysis of the first steps of phenol adsorption-oxidation over coprecipitated Mn–Ce catalysts: a DRIFTS study D'Alessandro, Oriana Ciencias Exactas Química Mn–Ce composite Phenol oxidation Phenolate Carboxylate Monodentate phenoxy group |
title_short |
An analysis of the first steps of phenol adsorption-oxidation over coprecipitated Mn–Ce catalysts: a DRIFTS study |
title_full |
An analysis of the first steps of phenol adsorption-oxidation over coprecipitated Mn–Ce catalysts: a DRIFTS study |
title_fullStr |
An analysis of the first steps of phenol adsorption-oxidation over coprecipitated Mn–Ce catalysts: a DRIFTS study |
title_full_unstemmed |
An analysis of the first steps of phenol adsorption-oxidation over coprecipitated Mn–Ce catalysts: a DRIFTS study |
title_sort |
An analysis of the first steps of phenol adsorption-oxidation over coprecipitated Mn–Ce catalysts: a DRIFTS study |
dc.creator.none.fl_str_mv |
D'Alessandro, Oriana Thomas, Horacio Jorge Sambeth, Jorge Enrique |
author |
D'Alessandro, Oriana |
author_facet |
D'Alessandro, Oriana Thomas, Horacio Jorge Sambeth, Jorge Enrique |
author_role |
author |
author2 |
Thomas, Horacio Jorge Sambeth, Jorge Enrique |
author2_role |
author author |
dc.subject.none.fl_str_mv |
Ciencias Exactas Química Mn–Ce composite Phenol oxidation Phenolate Carboxylate Monodentate phenoxy group |
topic |
Ciencias Exactas Química Mn–Ce composite Phenol oxidation Phenolate Carboxylate Monodentate phenoxy group |
dc.description.none.fl_txt_mv |
A series of Mn–Ce(M) solids (M = K or Na), with molar ratios 100–0, 50–50 and 0–100 were prepared by co-precipitation of manganese and cerium nitrate from NaOH or KOH solutions at pH = 11. In addition, part of the solids precipitated with NaOH were dried and impregnated with a Cu²⁺ salt. The solids were characterized by XRD, Specific Surface Area, XPS and EDS. The characterization analyses show the formation of Mn mixed oxides with different oxidation states (Mn³⁺, Mn⁴⁺), for samples without Ce or Mn–Ce(M) 50–50. In the latter solid and in the one where there is no Mn, the formation of CeO₂ (fluorite type) was detected. The samples were tested in the phenol removal in water at 100 °C and at atmospheric pressure with the aim to analyze the adsorbed species in the first stage of the adsorption-oxidation mechanisms. The results indicate, on the one hand, that [MnOₓ] is the active species in the process and that the most active solids are those that present (i) a higher concentration of O<sub>I</sub>, (ii) a higher amount of Mn⁴⁺ ions. DRIFT spectroscopy showed a possible mechanism of phenol adsorption on two sites, in the first one by H interaction of OH (phenol) with an OH of the catalyst and in the second, by the formation of a phenolate species between an O (OH phenol) and Mnⁿ⁺. Centro de Investigación y Desarrollo en Ciencias Aplicadas Planta Piloto Multipropósito - Laboratorio de Servicios a la Industria y al Sistema Científico |
description |
A series of Mn–Ce(M) solids (M = K or Na), with molar ratios 100–0, 50–50 and 0–100 were prepared by co-precipitation of manganese and cerium nitrate from NaOH or KOH solutions at pH = 11. In addition, part of the solids precipitated with NaOH were dried and impregnated with a Cu²⁺ salt. The solids were characterized by XRD, Specific Surface Area, XPS and EDS. The characterization analyses show the formation of Mn mixed oxides with different oxidation states (Mn³⁺, Mn⁴⁺), for samples without Ce or Mn–Ce(M) 50–50. In the latter solid and in the one where there is no Mn, the formation of CeO₂ (fluorite type) was detected. The samples were tested in the phenol removal in water at 100 °C and at atmospheric pressure with the aim to analyze the adsorbed species in the first stage of the adsorption-oxidation mechanisms. The results indicate, on the one hand, that [MnOₓ] is the active species in the process and that the most active solids are those that present (i) a higher concentration of O<sub>I</sub>, (ii) a higher amount of Mn⁴⁺ ions. DRIFT spectroscopy showed a possible mechanism of phenol adsorption on two sites, in the first one by H interaction of OH (phenol) with an OH of the catalyst and in the second, by the formation of a phenolate species between an O (OH phenol) and Mnⁿ⁺. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-12 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/136851 |
url |
http://sedici.unlp.edu.ar/handle/10915/136851 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/1878-5190 info:eu-repo/semantics/altIdentifier/issn/1878-5204 info:eu-repo/semantics/altIdentifier/doi/10.1007/s11144-012-0470-0 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
eu_rights_str_mv |
openAccess |
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http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
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application/pdf 295-309 |
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