Boosting water activation determining-step in WGS reaction on structured catalyst by Mo-doping

Proton conductors Mo-Eu-Zr mixed oxide systems were synthesized and further mixed with a conventional Pt/CeO2/Al2O3 catalyst to develop a highly efficient water-gas-shift (WGS) catalyst. The designed catalyst, once structured, allows reach the equilibrium conversion at medium temperatures (∼350 °C)...

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Autores: García Moncada, Nuria, Martínez Tejada, Leidy Marcela, Romero Sarria, Francisca, Odriozola Gordón, José Antonio
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2022
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/179054
Acceso en línea:https://hdl.handle.net/11441/179054
https://doi.org/10.1016/j.cattod.2020.06.003
Access Level:acceso abierto
Palabra clave:WGS
Proton conductor
Pt catalyst
Water activation
Mo-doped mixed oxide
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spelling Boosting water activation determining-step in WGS reaction on structured catalyst by Mo-dopingGarcía Moncada, NuriaGarcía Moncada, NuriaMartínez Tejada, Leidy MarcelaRomero Sarria, FranciscaOdriozola Gordón, José AntonioWGSProton conductorPt catalystWater activationMo-doped mixed oxideProton conductors Mo-Eu-Zr mixed oxide systems were synthesized and further mixed with a conventional Pt/CeO2/Al2O3 catalyst to develop a highly efficient water-gas-shift (WGS) catalyst. The designed catalyst, once structured, allows reach the equilibrium conversion at medium temperatures (∼350 °C) at 80 L·g−1 h−1 space velocity. The ability of the proton conductor to maintain an elevated water concentration at the metal-support interface by Grotthuss’ mechanism boosts the catalytic activity in WGS reaction. The Mo-containing proton conductor is extensively characterized allowing to establish the formation of molybdenum oxide phases nucleating on top of the Eu sites in Eu-Zr oxide solid solution. [MoO4]2− to [Mo7O24]6− clusters nucleates at low Mo contents resulting in a α-MoO3 layer on increasing its content. In presence of H2, Mo-bronzes are formed from ∼200 °C enhancing water concentration at the surfaces and boosting the catalytic activity in the WGS reaction. These results pave the way for developing lower volume WGS reactors.ElsevierQuímica InorgánicaMinisterio de Economía y Competitividad (MINECO). España2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/179054https://doi.org/10.1016/j.cattod.2020.06.003reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésCatalysis Today, 383, 193-204.ENE2015-66975-C3-2-RRTI2018-096294-B-C33https://doi.org/10.1016/j.cattod.2020.06.003info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1790542026-06-17T12:51:07Z
dc.title.none.fl_str_mv Boosting water activation determining-step in WGS reaction on structured catalyst by Mo-doping
title Boosting water activation determining-step in WGS reaction on structured catalyst by Mo-doping
spellingShingle Boosting water activation determining-step in WGS reaction on structured catalyst by Mo-doping
García Moncada, Nuria
WGS
Proton conductor
Pt catalyst
Water activation
Mo-doped mixed oxide
title_short Boosting water activation determining-step in WGS reaction on structured catalyst by Mo-doping
title_full Boosting water activation determining-step in WGS reaction on structured catalyst by Mo-doping
title_fullStr Boosting water activation determining-step in WGS reaction on structured catalyst by Mo-doping
title_full_unstemmed Boosting water activation determining-step in WGS reaction on structured catalyst by Mo-doping
title_sort Boosting water activation determining-step in WGS reaction on structured catalyst by Mo-doping
dc.creator.none.fl_str_mv García Moncada, Nuria
García Moncada, Nuria
Martínez Tejada, Leidy Marcela
Romero Sarria, Francisca
Odriozola Gordón, José Antonio
author García Moncada, Nuria
author_facet García Moncada, Nuria
Martínez Tejada, Leidy Marcela
Romero Sarria, Francisca
Odriozola Gordón, José Antonio
author_role author
author2 Martínez Tejada, Leidy Marcela
Romero Sarria, Francisca
Odriozola Gordón, José Antonio
author2_role author
author
author
dc.contributor.none.fl_str_mv Química Inorgánica
Ministerio de Economía y Competitividad (MINECO). España
dc.subject.none.fl_str_mv WGS
Proton conductor
Pt catalyst
Water activation
Mo-doped mixed oxide
topic WGS
Proton conductor
Pt catalyst
Water activation
Mo-doped mixed oxide
description Proton conductors Mo-Eu-Zr mixed oxide systems were synthesized and further mixed with a conventional Pt/CeO2/Al2O3 catalyst to develop a highly efficient water-gas-shift (WGS) catalyst. The designed catalyst, once structured, allows reach the equilibrium conversion at medium temperatures (∼350 °C) at 80 L·g−1 h−1 space velocity. The ability of the proton conductor to maintain an elevated water concentration at the metal-support interface by Grotthuss’ mechanism boosts the catalytic activity in WGS reaction. The Mo-containing proton conductor is extensively characterized allowing to establish the formation of molybdenum oxide phases nucleating on top of the Eu sites in Eu-Zr oxide solid solution. [MoO4]2− to [Mo7O24]6− clusters nucleates at low Mo contents resulting in a α-MoO3 layer on increasing its content. In presence of H2, Mo-bronzes are formed from ∼200 °C enhancing water concentration at the surfaces and boosting the catalytic activity in the WGS reaction. These results pave the way for developing lower volume WGS reactors.
publishDate 2022
dc.date.none.fl_str_mv 2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/179054
https://doi.org/10.1016/j.cattod.2020.06.003
url https://hdl.handle.net/11441/179054
https://doi.org/10.1016/j.cattod.2020.06.003
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Catalysis Today, 383, 193-204.
ENE2015-66975-C3-2-R
RTI2018-096294-B-C33
https://doi.org/10.1016/j.cattod.2020.06.003
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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