TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in dry reforming of methane

The potential of TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in the dry reforming of methane (DRM) is highlighted. The comparison of a nickel catalyst supported on natural bentonite and one prepared on TiO2-modified bentonite revealed a significantly different beha...

Descripción completa

Detalles Bibliográficos
Autores: Boudiaf, Meriem, Holgado, Juan P., Halliche, Djamila, Caballero, Alfonso
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/404053
Acceso en línea:http://hdl.handle.net/10261/404053
https://api.elsevier.com/content/abstract/scopus_id/105012196036
Access Level:acceso abierto
Palabra clave:Coke resistance
Dry reforming
In situ XPS
Nickel
SMSI
TiO2-modified clay
id ES_4e416065c6cd75a6eb878d63bad47215
oai_identifier_str oai:digital.csic.es:10261/404053
network_acronym_str ES
network_name_str España
repository_id_str
spelling TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in dry reforming of methaneBoudiaf, MeriemHolgado, Juan P.Halliche, DjamilaCaballero, AlfonsoCoke resistanceDry reformingIn situ XPSNickelSMSITiO2-modified clayThe potential of TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in the dry reforming of methane (DRM) is highlighted. The comparison of a nickel catalyst supported on natural bentonite and one prepared on TiO2-modified bentonite revealed a significantly different behavior between the two catalysts under diluted and concentrated DRM reaction conditions. The unmodified bentonite catalyst, 15Ni/Na-Bent, exhibits high activity under diluted conditions (20CH4:20CO2:60He) but deactivates quickly under concentrated DRM conditions (40CH4:40CO2:20He). On the other hand, 15Ni/TiO2-Bent is less active at diluted conditions but demonstrates superior stability and activity in concentrated conditions. In situ XPS analysis of the O 1s, Al 2p, Si 2p, and Ti 2p regions of the calcined, reduced, and post-DRM samples revealed that TiO2 stabilizes the clay structure and prevents nickel reoxidation. The formation of TiO2-x species after reduction creates oxygen vacancies that trap oxidizing species in the reaction medium, thus limiting nickel reoxidation and reducing carbon deposition on the surface. Moreover, these TiO2-x species migrate to the nickel surface, forming a thin protective layer that partially encapsulates the nickel, improving metal–support interactions and providing resistance against sintering and reoxidation. In addition to XPS spectroscopy, which provided insights into the nature of the metal–support interactions in the 15Ni/Na-Bent and 15Ni/TiO2-Bent catalysts, the materials were also characterized using XRF, XRD, SEM, BET, TPR-H2, and Raman spectroscopy. These techniques offered complementary structural, textural, and morphological information, leading to a more comprehensive understanding of the catalysts’ physicochemical properties.This research was funded by Spanish Junta de Andalucia–Consejería de Economía y Conocimiento and Ministerio de Ciencia for grants US-1263455 (PID2020-119946RB-I00 and ENE2017-88818-C2-1-R, PID2020-119946RB-I00). Financial funding for the internship carried out at Instituto de Ciencia de Materiales de Sevilla (www.icmse.csic.es) by Meriem Boudiaf was granted by the University of Science and Technology Houari Boumediene (USTHB).Peer reviewedSpringer NatureJunta de AndalucíaAgencia Estatal de Investigación (España)Ministerio de Ciencia, Innovación y Universidades (España)CSIC - Instituto de Ciencia de Materiales de Sevilla (ICMS)University of Science and Technology Houari BoumedieneHolgado, Juan P. [0000-0003-4551-5094]Caballero, Alfonso [0000-0003-1704-3261]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/404053https://api.elsevier.com/content/abstract/scopus_id/105012196036reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-119946RB-I00The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI https://doi.org/10.1007/s11164-025-05674-6https://doi.org/10.1007/s11164-025-05674-6Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/4040532026-05-22T06:33:51Z
dc.title.none.fl_str_mv TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in dry reforming of methane
title TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in dry reforming of methane
spellingShingle TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in dry reforming of methane
Boudiaf, Meriem
Coke resistance
Dry reforming
In situ XPS
Nickel
SMSI
TiO2-modified clay
title_short TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in dry reforming of methane
title_full TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in dry reforming of methane
title_fullStr TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in dry reforming of methane
title_full_unstemmed TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in dry reforming of methane
title_sort TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in dry reforming of methane
dc.creator.none.fl_str_mv Boudiaf, Meriem
Holgado, Juan P.
Halliche, Djamila
Caballero, Alfonso
author Boudiaf, Meriem
author_facet Boudiaf, Meriem
Holgado, Juan P.
Halliche, Djamila
Caballero, Alfonso
author_role author
author2 Holgado, Juan P.
Halliche, Djamila
Caballero, Alfonso
author2_role author
author
author
dc.contributor.none.fl_str_mv Junta de Andalucía
Agencia Estatal de Investigación (España)
Ministerio de Ciencia, Innovación y Universidades (España)
CSIC - Instituto de Ciencia de Materiales de Sevilla (ICMS)
University of Science and Technology Houari Boumediene
Holgado, Juan P. [0000-0003-4551-5094]
Caballero, Alfonso [0000-0003-1704-3261]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Coke resistance
Dry reforming
In situ XPS
Nickel
SMSI
TiO2-modified clay
topic Coke resistance
Dry reforming
In situ XPS
Nickel
SMSI
TiO2-modified clay
description The potential of TiO2-modified bentonite as a cost-effective support for nickel-based catalysts in the dry reforming of methane (DRM) is highlighted. The comparison of a nickel catalyst supported on natural bentonite and one prepared on TiO2-modified bentonite revealed a significantly different behavior between the two catalysts under diluted and concentrated DRM reaction conditions. The unmodified bentonite catalyst, 15Ni/Na-Bent, exhibits high activity under diluted conditions (20CH4:20CO2:60He) but deactivates quickly under concentrated DRM conditions (40CH4:40CO2:20He). On the other hand, 15Ni/TiO2-Bent is less active at diluted conditions but demonstrates superior stability and activity in concentrated conditions. In situ XPS analysis of the O 1s, Al 2p, Si 2p, and Ti 2p regions of the calcined, reduced, and post-DRM samples revealed that TiO2 stabilizes the clay structure and prevents nickel reoxidation. The formation of TiO2-x species after reduction creates oxygen vacancies that trap oxidizing species in the reaction medium, thus limiting nickel reoxidation and reducing carbon deposition on the surface. Moreover, these TiO2-x species migrate to the nickel surface, forming a thin protective layer that partially encapsulates the nickel, improving metal–support interactions and providing resistance against sintering and reoxidation. In addition to XPS spectroscopy, which provided insights into the nature of the metal–support interactions in the 15Ni/Na-Bent and 15Ni/TiO2-Bent catalysts, the materials were also characterized using XRF, XRD, SEM, BET, TPR-H2, and Raman spectroscopy. These techniques offered complementary structural, textural, and morphological information, leading to a more comprehensive understanding of the catalysts’ physicochemical properties.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/404053
https://api.elsevier.com/content/abstract/scopus_id/105012196036
url http://hdl.handle.net/10261/404053
https://api.elsevier.com/content/abstract/scopus_id/105012196036
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-119946RB-I00
The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI https://doi.org/10.1007/s11164-025-05674-6
https://doi.org/10.1007/s11164-025-05674-6
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer Nature
publisher.none.fl_str_mv Springer Nature
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869407744150208512
score 15.811543

Similares en LA Referencia