Appraisal of Ni Species Supported on Porous MgO during Ethanol Steam Reforming by XAS
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1002/cctc.202200684 http://hdl.handle.net/11449/249281 |
Resumo: | Operando time-resolved X-ray absorption spectroscopy (XAS) was used to determine nickel species supported on porous MgO during the ethanol steam reforming reaction. The Principal Component Analysis (PCA) of the nickel K-edge XAS spectra revealed Ni(OH)2, NiMgO, and metallic Ni during the activation and reaction of the catalysts. The Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS) method for the time-resolved XAS spectra data permitted to calculate the concentration of species during the activation and reaction steps and to determine the formation of NiMgO and nickel reduction degree. The samples prepared with surfactants, Ni10MgO-F127 and Ni10MgO-P123, showed less nickel reduction (less than 30 %) but were more active and stable than the reference Ni10MgO catalyst, which reduced 52 %. It happened due to the smaller particle size and a larger specific area of the porous supports. The samples synthesized without Pluronic deactivated, and ethanol dehydrogenation became predominant instead of the ethanol steam reforming. |
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Appraisal of Ni Species Supported on Porous MgO during Ethanol Steam Reforming by XASethanol steam reforminghydrogenMgOnickelTime-resolved XASOperando time-resolved X-ray absorption spectroscopy (XAS) was used to determine nickel species supported on porous MgO during the ethanol steam reforming reaction. The Principal Component Analysis (PCA) of the nickel K-edge XAS spectra revealed Ni(OH)2, NiMgO, and metallic Ni during the activation and reaction of the catalysts. The Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS) method for the time-resolved XAS spectra data permitted to calculate the concentration of species during the activation and reaction steps and to determine the formation of NiMgO and nickel reduction degree. The samples prepared with surfactants, Ni10MgO-F127 and Ni10MgO-P123, showed less nickel reduction (less than 30 %) but were more active and stable than the reference Ni10MgO catalyst, which reduced 52 %. It happened due to the smaller particle size and a larger specific area of the porous supports. The samples synthesized without Pluronic deactivated, and ethanol dehydrogenation became predominant instead of the ethanol steam reforming.Instituto de Química Unesp-Universidade Estadual Paulista, Rua Prof. Francisco Degni 55, SPSynchrotron SOLEIL L'Orme des Merisiers BP48Instituto de Química Unesp-Universidade Estadual Paulista, Rua Prof. Francisco Degni 55, SPUniversidade Estadual Paulista (UNESP)L'Orme des Merisiers BP48Possato, Luiz G. [UNESP]Pulcinelli, Sandra H. [UNESP]Martins, Leandro [UNESP]Briois, ValerieSantilli, Celso V. [UNESP]2023-07-29T14:52:57Z2023-07-29T14:52:57Z2022-11-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1002/cctc.202200684ChemCatChem, v. 14, n. 21, 2022.1867-38991867-3880http://hdl.handle.net/11449/24928110.1002/cctc.2022006842-s2.0-85140089417Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengChemCatCheminfo:eu-repo/semantics/openAccess2023-07-29T14:52:57Zoai:repositorio.unesp.br:11449/249281Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-07-29T14:52:57Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Appraisal of Ni Species Supported on Porous MgO during Ethanol Steam Reforming by XAS |
title |
Appraisal of Ni Species Supported on Porous MgO during Ethanol Steam Reforming by XAS |
spellingShingle |
Appraisal of Ni Species Supported on Porous MgO during Ethanol Steam Reforming by XAS Possato, Luiz G. [UNESP] ethanol steam reforming hydrogen MgO nickel Time-resolved XAS |
title_short |
Appraisal of Ni Species Supported on Porous MgO during Ethanol Steam Reforming by XAS |
title_full |
Appraisal of Ni Species Supported on Porous MgO during Ethanol Steam Reforming by XAS |
title_fullStr |
Appraisal of Ni Species Supported on Porous MgO during Ethanol Steam Reforming by XAS |
title_full_unstemmed |
Appraisal of Ni Species Supported on Porous MgO during Ethanol Steam Reforming by XAS |
title_sort |
Appraisal of Ni Species Supported on Porous MgO during Ethanol Steam Reforming by XAS |
author |
Possato, Luiz G. [UNESP] |
author_facet |
Possato, Luiz G. [UNESP] Pulcinelli, Sandra H. [UNESP] Martins, Leandro [UNESP] Briois, Valerie Santilli, Celso V. [UNESP] |
author_role |
author |
author2 |
Pulcinelli, Sandra H. [UNESP] Martins, Leandro [UNESP] Briois, Valerie Santilli, Celso V. [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) L'Orme des Merisiers BP48 |
dc.contributor.author.fl_str_mv |
Possato, Luiz G. [UNESP] Pulcinelli, Sandra H. [UNESP] Martins, Leandro [UNESP] Briois, Valerie Santilli, Celso V. [UNESP] |
dc.subject.por.fl_str_mv |
ethanol steam reforming hydrogen MgO nickel Time-resolved XAS |
topic |
ethanol steam reforming hydrogen MgO nickel Time-resolved XAS |
description |
Operando time-resolved X-ray absorption spectroscopy (XAS) was used to determine nickel species supported on porous MgO during the ethanol steam reforming reaction. The Principal Component Analysis (PCA) of the nickel K-edge XAS spectra revealed Ni(OH)2, NiMgO, and metallic Ni during the activation and reaction of the catalysts. The Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS) method for the time-resolved XAS spectra data permitted to calculate the concentration of species during the activation and reaction steps and to determine the formation of NiMgO and nickel reduction degree. The samples prepared with surfactants, Ni10MgO-F127 and Ni10MgO-P123, showed less nickel reduction (less than 30 %) but were more active and stable than the reference Ni10MgO catalyst, which reduced 52 %. It happened due to the smaller particle size and a larger specific area of the porous supports. The samples synthesized without Pluronic deactivated, and ethanol dehydrogenation became predominant instead of the ethanol steam reforming. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-11-08 2023-07-29T14:52:57Z 2023-07-29T14:52:57Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1002/cctc.202200684 ChemCatChem, v. 14, n. 21, 2022. 1867-3899 1867-3880 http://hdl.handle.net/11449/249281 10.1002/cctc.202200684 2-s2.0-85140089417 |
url |
http://dx.doi.org/10.1002/cctc.202200684 http://hdl.handle.net/11449/249281 |
identifier_str_mv |
ChemCatChem, v. 14, n. 21, 2022. 1867-3899 1867-3880 10.1002/cctc.202200684 2-s2.0-85140089417 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
ChemCatChem |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965355455545344 |