Enhanced ceria nanoflakes using graphene oxide as a sacrificial template for CO oxidation and dry reforming of methane

The development of novel fabrication methods to produce ceria catalysts with good high-temperature stability is critical for their implementation across a range of different applications. Herein, graphene oxide flakes are used as a sacrificial template in the synthesis of ceria particles to replicat...

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Autores: Rood, Shawn|||0000-0002-5416-9894, Ahmet, Huseyin B., Gomez-Ramon, Anais, Torrente-Murciano, Laura|||0000-0002-7938-2587, Ramírez Reina, Tomás, Eslava, Salvador|||0000-0002-2416-3205
Formato: artículo
Fecha de publicación:2019
País:España
Recursos:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:223111
Acesso em linha:https://ddd.uab.cat/record/223111
https://dx.doi.org/urn:doi:10.1016/j.apcatb.2018.10.011
Access Level:acceso abierto
Palavra-chave:Ceria
Dry methane reforming
CO oxidation
Graphene oxide
Template
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spelling Enhanced ceria nanoflakes using graphene oxide as a sacrificial template for CO oxidation and dry reforming of methaneRood, Shawn|||0000-0002-5416-9894Ahmet, Huseyin B.Gomez-Ramon, AnaisTorrente-Murciano, Laura|||0000-0002-7938-2587Ramírez Reina, TomásEslava, Salvador|||0000-0002-2416-3205CeriaDry methane reformingCO oxidationGraphene oxideTemplateThe development of novel fabrication methods to produce ceria catalysts with good high-temperature stability is critical for their implementation across a range of different applications. Herein, graphene oxide flakes are used as a sacrificial template in the synthesis of ceria particles to replicate the graphene oxide's two-dimensionality. While performing the synthesis without graphene oxide results in large agglomerations of ceria crystallites, the addition of graphene oxide during the synthesis results in ceria nanoflakes (<10 nm) replicating the graphene oxide morphology. This novel shape limits the diffusion of atoms at high temperature to a two-dimensional plane which is translated into a low sintering degree and consequently, an enhanced thermal stability. In this way, the ceria flakes are capable of maintaining high surface areas after calcination at high temperatures (>400 °C) which results in improved catalytic performance for the oxidation of carbon monoxide. This resistance versus sintering has also a beneficial effect when ceria flakes are used as catalytic support of nickel particles. Improved metal dispersion and high metal-support interaction leads to lower sintering during the dry reforming of methane than similarly prepared un-templated ceria nickel catalysts. These results demonstrate the advantage of using graphene oxide as a sacrificial template for the production of sintering-resistant catalysts with good catalytic performance at high temperatures. 22019-01-0120192019-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/223111https://dx.doi.org/urn:doi:10.1016/j.apcatb.2018.10.011reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2231112026-06-06T12:50:31Z
dc.title.none.fl_str_mv Enhanced ceria nanoflakes using graphene oxide as a sacrificial template for CO oxidation and dry reforming of methane
title Enhanced ceria nanoflakes using graphene oxide as a sacrificial template for CO oxidation and dry reforming of methane
spellingShingle Enhanced ceria nanoflakes using graphene oxide as a sacrificial template for CO oxidation and dry reforming of methane
Rood, Shawn|||0000-0002-5416-9894
Ceria
Dry methane reforming
CO oxidation
Graphene oxide
Template
title_short Enhanced ceria nanoflakes using graphene oxide as a sacrificial template for CO oxidation and dry reforming of methane
title_full Enhanced ceria nanoflakes using graphene oxide as a sacrificial template for CO oxidation and dry reforming of methane
title_fullStr Enhanced ceria nanoflakes using graphene oxide as a sacrificial template for CO oxidation and dry reforming of methane
title_full_unstemmed Enhanced ceria nanoflakes using graphene oxide as a sacrificial template for CO oxidation and dry reforming of methane
title_sort Enhanced ceria nanoflakes using graphene oxide as a sacrificial template for CO oxidation and dry reforming of methane
dc.creator.none.fl_str_mv Rood, Shawn|||0000-0002-5416-9894
Ahmet, Huseyin B.
Gomez-Ramon, Anais
Torrente-Murciano, Laura|||0000-0002-7938-2587
Ramírez Reina, Tomás
Eslava, Salvador|||0000-0002-2416-3205
author Rood, Shawn|||0000-0002-5416-9894
author_facet Rood, Shawn|||0000-0002-5416-9894
Ahmet, Huseyin B.
Gomez-Ramon, Anais
Torrente-Murciano, Laura|||0000-0002-7938-2587
Ramírez Reina, Tomás
Eslava, Salvador|||0000-0002-2416-3205
author_role author
author2 Ahmet, Huseyin B.
Gomez-Ramon, Anais
Torrente-Murciano, Laura|||0000-0002-7938-2587
Ramírez Reina, Tomás
Eslava, Salvador|||0000-0002-2416-3205
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ceria
Dry methane reforming
CO oxidation
Graphene oxide
Template
topic Ceria
Dry methane reforming
CO oxidation
Graphene oxide
Template
description The development of novel fabrication methods to produce ceria catalysts with good high-temperature stability is critical for their implementation across a range of different applications. Herein, graphene oxide flakes are used as a sacrificial template in the synthesis of ceria particles to replicate the graphene oxide's two-dimensionality. While performing the synthesis without graphene oxide results in large agglomerations of ceria crystallites, the addition of graphene oxide during the synthesis results in ceria nanoflakes (<10 nm) replicating the graphene oxide morphology. This novel shape limits the diffusion of atoms at high temperature to a two-dimensional plane which is translated into a low sintering degree and consequently, an enhanced thermal stability. In this way, the ceria flakes are capable of maintaining high surface areas after calcination at high temperatures (>400 °C) which results in improved catalytic performance for the oxidation of carbon monoxide. This resistance versus sintering has also a beneficial effect when ceria flakes are used as catalytic support of nickel particles. Improved metal dispersion and high metal-support interaction leads to lower sintering during the dry reforming of methane than similarly prepared un-templated ceria nickel catalysts. These results demonstrate the advantage of using graphene oxide as a sacrificial template for the production of sintering-resistant catalysts with good catalytic performance at high temperatures.
publishDate 2019
dc.date.none.fl_str_mv 2
2019-01-01
2019
2019-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/223111
https://dx.doi.org/urn:doi:10.1016/j.apcatb.2018.10.011
url https://ddd.uab.cat/record/223111
https://dx.doi.org/urn:doi:10.1016/j.apcatb.2018.10.011
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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