Defect-surface engineering of La-doped ceria for microwave-assisted hydrogen production

[EN] Hydrogen plays a pivotal role in decarbonizing the energy and chemical sectors, yet current production methods are limited by high temperatures and energy demands. Microwave-assisted thermochemical redox cycles offer a promising low-temperature, contactless alternative by coupling electromagnet...

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Autores: Domínguez-Saldaña, Aitor|||0000-0001-7539-7493, Carrillo-Del Teso, Alfonso Juan, Balaguer Ramirez, Maria|||0000-0002-7098-9235, García-Baños, Beatriz|||0000-0001-7862-3417, Plaza González, Pedro José|||0000-0002-2623-0782, Catalá Civera, José Manuel|||0000-0002-0617-1762, Serra Alfaro, José Manuel|||0000-0002-1515-1106, Navarrete Algaba, Laura, Santos, Joaquin, Catalán-Martínez, David
Formato: artículo
Fecha de publicación:2026
País:España
Recursos:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:dnet:riunet______::ab2eb09b71bf51414de412d587092bb4
Acesso em linha:https://riunet.upv.es/handle/10251/234416
Access Level:acceso abierto
Palavra-chave:Microwave-assisted thermochemical cycles
Hydrogen production
Lanthanum-doped ceria
Oxygen vacancies
Redox kinetics
Defect engineering
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oai_identifier_str oai:dnet:riunet______::ab2eb09b71bf51414de412d587092bb4
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Defect-surface engineering of La-doped ceria for microwave-assisted hydrogen production
title Defect-surface engineering of La-doped ceria for microwave-assisted hydrogen production
spellingShingle Defect-surface engineering of La-doped ceria for microwave-assisted hydrogen production
Domínguez-Saldaña, Aitor|||0000-0001-7539-7493
Microwave-assisted thermochemical cycles
Hydrogen production
Lanthanum-doped ceria
Oxygen vacancies
Redox kinetics
Defect engineering
title_short Defect-surface engineering of La-doped ceria for microwave-assisted hydrogen production
title_full Defect-surface engineering of La-doped ceria for microwave-assisted hydrogen production
title_fullStr Defect-surface engineering of La-doped ceria for microwave-assisted hydrogen production
title_full_unstemmed Defect-surface engineering of La-doped ceria for microwave-assisted hydrogen production
title_sort Defect-surface engineering of La-doped ceria for microwave-assisted hydrogen production
dc.creator.none.fl_str_mv Domínguez-Saldaña, Aitor|||0000-0001-7539-7493
Carrillo-Del Teso, Alfonso Juan
Balaguer Ramirez, Maria|||0000-0002-7098-9235
García-Baños, Beatriz|||0000-0001-7862-3417
Plaza González, Pedro José|||0000-0002-2623-0782
Catalá Civera, José Manuel|||0000-0002-0617-1762
Serra Alfaro, José Manuel|||0000-0002-1515-1106
Navarrete Algaba, Laura
Santos, Joaquin
Catalán-Martínez, David
author Domínguez-Saldaña, Aitor|||0000-0001-7539-7493
author_facet Domínguez-Saldaña, Aitor|||0000-0001-7539-7493
Carrillo-Del Teso, Alfonso Juan
Balaguer Ramirez, Maria|||0000-0002-7098-9235
García-Baños, Beatriz|||0000-0001-7862-3417
Plaza González, Pedro José|||0000-0002-2623-0782
Catalá Civera, José Manuel|||0000-0002-0617-1762
Serra Alfaro, José Manuel|||0000-0002-1515-1106
Navarrete Algaba, Laura
Santos, Joaquin
Catalán-Martínez, David
author_role author
author2 Carrillo-Del Teso, Alfonso Juan
Balaguer Ramirez, Maria|||0000-0002-7098-9235
García-Baños, Beatriz|||0000-0001-7862-3417
Plaza González, Pedro José|||0000-0002-2623-0782
Catalá Civera, José Manuel|||0000-0002-0617-1762
Serra Alfaro, José Manuel|||0000-0002-1515-1106
Navarrete Algaba, Laura
Santos, Joaquin
Catalán-Martínez, David
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Instituto Universitario Mixto de Tecnología Química
Escuela Técnica Superior de Ingeniería de Telecomunicación
Instituto Universitario de Tecnologías de la Información y Comunicaciones
Departamento de Comunicaciones
Agencia Estatal de Investigación
Universitat Politècnica de València
Ministerio de Ciencia, Innovación y Universidades
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv Microwave-assisted thermochemical cycles
Hydrogen production
Lanthanum-doped ceria
Oxygen vacancies
Redox kinetics
Defect engineering
topic Microwave-assisted thermochemical cycles
Hydrogen production
Lanthanum-doped ceria
Oxygen vacancies
Redox kinetics
Defect engineering
description [EN] Hydrogen plays a pivotal role in decarbonizing the energy and chemical sectors, yet current production methods are limited by high temperatures and energy demands. Microwave-assisted thermochemical redox cycles offer a promising low-temperature, contactless alternative by coupling electromagnetic energy with reducible oxides. In this study, we explore La-doped ceria (Ce1-xLaxO2-delta) as a tunable platform to enhance microwave-driven hydrogen production. We demonstrate that introducing La3+ into the ceria lattice reduces the bandgap and increases dielectric permittivity, enabling Ce4+ to Ce3+ reduction at temperatures as low as 110 degrees C. Among the series, Ce0.9La0.1O1.95 exhibits optimal performance, balancing high ionic mobility and microwave absorption. Combined with tailored surface area, this composition achieves an unprecedented hydrogen production rate of 2.60 mL g-1 per cycle at temperatures below 400 degrees C. Correlations between dopant concentration, polarization behavior, and redox kinetics reveal the key role of band structure breakdown and defect formation in driving non-equilibrium reduction. Our findings uncover mechanistic insights into microwave-material interactions and establish design principles for next-generation redox materials. This approach provides a framework for scalable, electrified hydrogen production via electronic structure and defect engineering in oxide systems.
publishDate 2026
dc.date.none.fl_str_mv 2026
2026-03-01
dc.type.none.fl_str_mv journal 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://riunet.upv.es/handle/10251/234416
url https://riunet.upv.es/handle/10251/234416
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2022-139663OB-I00 DESCARBONIZACION DE LA INDUSTRIA DE PROCESOS MEDIANTE LA CATALISIS INTENSIFICADA POR INTEGRACION DE TECNOLOGIAS FACILITADORAS ESENCIALES
Universitat Politècnica de València https://doi.org/10.13039/501100004233 PAID-06-24 Ayuda a Primeros Proyectos de Investigación (PAID-06-24)
Ministerio de Ciencia, Innovación y Universidades https://doi.org/10.13039/100014440 TED2021-132590B-C22
Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 RYC2021-033889-I
Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 CEX2021-001230-S
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento - No comercial (by-nc)
http://creativecommons.org/licenses/by-nc/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
Reconocimiento - No comercial (by-nc)
http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv The Royal Society of Chemistry
publisher.none.fl_str_mv The Royal Society of Chemistry
dc.source.none.fl_str_mv reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname:Universitat Politècnica de València (UPV)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling Defect-surface engineering of La-doped ceria for microwave-assisted hydrogen productionDomínguez-Saldaña, Aitor|||0000-0001-7539-7493Carrillo-Del Teso, Alfonso JuanBalaguer Ramirez, Maria|||0000-0002-7098-9235García-Baños, Beatriz|||0000-0001-7862-3417Plaza González, Pedro José|||0000-0002-2623-0782Catalá Civera, José Manuel|||0000-0002-0617-1762Serra Alfaro, José Manuel|||0000-0002-1515-1106Navarrete Algaba, LauraSantos, JoaquinCatalán-Martínez, DavidMicrowave-assisted thermochemical cyclesHydrogen productionLanthanum-doped ceriaOxygen vacanciesRedox kineticsDefect engineering[EN] Hydrogen plays a pivotal role in decarbonizing the energy and chemical sectors, yet current production methods are limited by high temperatures and energy demands. Microwave-assisted thermochemical redox cycles offer a promising low-temperature, contactless alternative by coupling electromagnetic energy with reducible oxides. In this study, we explore La-doped ceria (Ce1-xLaxO2-delta) as a tunable platform to enhance microwave-driven hydrogen production. We demonstrate that introducing La3+ into the ceria lattice reduces the bandgap and increases dielectric permittivity, enabling Ce4+ to Ce3+ reduction at temperatures as low as 110 degrees C. Among the series, Ce0.9La0.1O1.95 exhibits optimal performance, balancing high ionic mobility and microwave absorption. Combined with tailored surface area, this composition achieves an unprecedented hydrogen production rate of 2.60 mL g-1 per cycle at temperatures below 400 degrees C. Correlations between dopant concentration, polarization behavior, and redox kinetics reveal the key role of band structure breakdown and defect formation in driving non-equilibrium reduction. Our findings uncover mechanistic insights into microwave-material interactions and establish design principles for next-generation redox materials. This approach provides a framework for scalable, electrified hydrogen production via electronic structure and defect engineering in oxide systems.Financial support by the Spanish Ministry of Science and Innovation and European Union (TED2021-132590B-C22, NextGenerationEU/PRTR, PID2022-139663OB-100, and CEX2021-001230-S grants funded by MCIN/AEI/10.13039/501100011033, "Ramon y Cajal" Fellowship RYC2021-033889-I grants) and Vice-Rectorate for Research of the Universitat Politecnica de Valencia (PAID-06-24 grants). Also, we acknowledge the support of the Servicio de Microscopia Electronica of the UPV.The Royal Society of ChemistryInstituto Universitario Mixto de Tecnología QuímicaEscuela Técnica Superior de Ingeniería de TelecomunicaciónInstituto Universitario de Tecnologías de la Información y ComunicacionesDepartamento de ComunicacionesAgencia Estatal de InvestigaciónUniversitat Politècnica de ValènciaMinisterio de Ciencia, Innovación y UniversidadesRepositorio Institucional de la Universitat Politècnica de València Riunet20262026-03-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://riunet.upv.es/handle/10251/234416reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2022-139663OB-I00 DESCARBONIZACION DE LA INDUSTRIA DE PROCESOS MEDIANTE LA CATALISIS INTENSIFICADA POR INTEGRACION DE TECNOLOGIAS FACILITADORAS ESENCIALESUniversitat Politècnica de València https://doi.org/10.13039/501100004233 PAID-06-24 Ayuda a Primeros Proyectos de Investigación (PAID-06-24)Ministerio de Ciencia, Innovación y Universidades https://doi.org/10.13039/100014440 TED2021-132590B-C22Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 RYC2021-033889-IAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 CEX2021-001230-Sopen accesshttp://purl.org/coar/access_right/c_abf2Reconocimiento - No comercial (by-nc) http://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessoai:dnet:riunet______::ab2eb09b71bf51414de412d587092bb42026-06-13T07:49:27Z
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