Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts

Autores
Barrios, Celina; Albiter, E.; Gracia y Jimenez, J. M.; Tiznado, H.; Romo Herrera, J.; Zanella, R.
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The photocatalytic production of hydrogen on modified Au/TiO2-based photocatalysts by using water/methanol mixtures was studied. The main goal was to study the effect of surface modification of Au/TiO2 with Pd, Ni and Co on H2 production under UV light irradiation (λ ca. 254 nm). Catalysts were produced by depositing Pd, Ni or Co precursors (nitrates hydrated salts) on TiO2 (Evonik, P25) by incipient wetness impregnation followed by thermal treatment under H2 (Pd and Co) or air (Ni). Thereafter, Au was incorporated by deposition-precipitation with urea (DPU method) and then the catalysts were thermally activated again under air flow. The photocatalysts were characterized by UV?Vis diffuse reflectance, HAADF-TEM, EDXS, FTIR CO adsorption, XPS and photoluminescence. In order to obtain detailed information about the composition of the nanoparticles, high-resolution elemental analyses (EDXS line scans) were performed. The Au-Pd, Au-Ni and Au-Co on TiO2 photocatalysts showed higher performance for H2 production (266, 256 and 171 mmol H2 mmolAu −1 h−1, respectively) compared to the Au/TiO2 material (106 mmol H2 mmolAu −1 h−1). PL results showed that the improved H2 production rate could be explained by an enhanced charge separation. The highest H2 production showed by the Au-Pd/TiO2 sample could be attributed to synergistic effects, derived from the interaction between Au and Pd particles. For the Au-Ni/TiO2 and Au-Co/TiO2 samples it is proposed that nickel or cobalt oxides worked as promoters (with additives effects) because of the formation of a p-n heterojunction.
Fil: Barrios, Celina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina. Universidad Nacional Autónoma de México; México
Fil: Albiter, E.. Universidad Nacional Autónoma de México; México
Fil: Gracia y Jimenez, J. M.. Benemérita Universidad Autónoma de Puebla; México
Fil: Tiznado, H.. Universidad Nacional Autónoma de México; México
Fil: Romo Herrera, J.. Universidad Nacional Autónoma de México; México
Fil: Zanella, R.. Universidad Nacional Autónoma de México; México
Materia
Au Nanoparticles
Bimetallic Catalysts
Hydrogen Production
Tio2
Water Splitting
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/24187
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/24187
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalystsBarrios, CelinaAlbiter, E.Gracia y Jimenez, J. M.Tiznado, H.Romo Herrera, J.Zanella, R.Au NanoparticlesBimetallic CatalystsHydrogen ProductionTio2Water Splittinghttps://purl.org/becyt/ford/2.10https://purl.org/becyt/ford/2The photocatalytic production of hydrogen on modified Au/TiO2-based photocatalysts by using water/methanol mixtures was studied. The main goal was to study the effect of surface modification of Au/TiO2 with Pd, Ni and Co on H2 production under UV light irradiation (λ ca. 254 nm). Catalysts were produced by depositing Pd, Ni or Co precursors (nitrates hydrated salts) on TiO2 (Evonik, P25) by incipient wetness impregnation followed by thermal treatment under H2 (Pd and Co) or air (Ni). Thereafter, Au was incorporated by deposition-precipitation with urea (DPU method) and then the catalysts were thermally activated again under air flow. The photocatalysts were characterized by UV?Vis diffuse reflectance, HAADF-TEM, EDXS, FTIR CO adsorption, XPS and photoluminescence. In order to obtain detailed information about the composition of the nanoparticles, high-resolution elemental analyses (EDXS line scans) were performed. The Au-Pd, Au-Ni and Au-Co on TiO2 photocatalysts showed higher performance for H2 production (266, 256 and 171 mmol H2 mmolAu −1 h−1, respectively) compared to the Au/TiO2 material (106 mmol H2 mmolAu −1 h−1). PL results showed that the improved H2 production rate could be explained by an enhanced charge separation. The highest H2 production showed by the Au-Pd/TiO2 sample could be attributed to synergistic effects, derived from the interaction between Au and Pd particles. For the Au-Ni/TiO2 and Au-Co/TiO2 samples it is proposed that nickel or cobalt oxides worked as promoters (with additives effects) because of the formation of a p-n heterojunction.Fil: Barrios, Celina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina. Universidad Nacional Autónoma de México; MéxicoFil: Albiter, E.. Universidad Nacional Autónoma de México; MéxicoFil: Gracia y Jimenez, J. M.. Benemérita Universidad Autónoma de Puebla; MéxicoFil: Tiznado, H.. Universidad Nacional Autónoma de México; MéxicoFil: Romo Herrera, J.. Universidad Nacional Autónoma de México; MéxicoFil: Zanella, R.. Universidad Nacional Autónoma de México; MéxicoElsevier2016-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/24187Barrios, Celina; Albiter, E.; Gracia y Jimenez, J. M.; Tiznado, H.; Romo Herrera, J.; et al.; Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts; Elsevier; International Journal of Hydrogen Energy; 41; 48; 12-2016; 23287-233000360-3199CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijhydene.2016.09.206info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0360319916314926info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:44:32Zoai:ri.conicet.gov.ar:11336/24187instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:44:33.091CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts
title Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts
spellingShingle Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts
Barrios, Celina
Au Nanoparticles
Bimetallic Catalysts
Hydrogen Production
Tio2
Water Splitting
title_short Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts
title_full Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts
title_fullStr Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts
title_full_unstemmed Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts
title_sort Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts
dc.creator.none.fl_str_mv Barrios, Celina
Albiter, E.
Gracia y Jimenez, J. M.
Tiznado, H.
Romo Herrera, J.
Zanella, R.
author Barrios, Celina
author_facet Barrios, Celina
Albiter, E.
Gracia y Jimenez, J. M.
Tiznado, H.
Romo Herrera, J.
Zanella, R.
author_role author
author2 Albiter, E.
Gracia y Jimenez, J. M.
Tiznado, H.
Romo Herrera, J.
Zanella, R.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Au Nanoparticles
Bimetallic Catalysts
Hydrogen Production
Tio2
Water Splitting
topic Au Nanoparticles
Bimetallic Catalysts
Hydrogen Production
Tio2
Water Splitting
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.10
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The photocatalytic production of hydrogen on modified Au/TiO2-based photocatalysts by using water/methanol mixtures was studied. The main goal was to study the effect of surface modification of Au/TiO2 with Pd, Ni and Co on H2 production under UV light irradiation (λ ca. 254 nm). Catalysts were produced by depositing Pd, Ni or Co precursors (nitrates hydrated salts) on TiO2 (Evonik, P25) by incipient wetness impregnation followed by thermal treatment under H2 (Pd and Co) or air (Ni). Thereafter, Au was incorporated by deposition-precipitation with urea (DPU method) and then the catalysts were thermally activated again under air flow. The photocatalysts were characterized by UV?Vis diffuse reflectance, HAADF-TEM, EDXS, FTIR CO adsorption, XPS and photoluminescence. In order to obtain detailed information about the composition of the nanoparticles, high-resolution elemental analyses (EDXS line scans) were performed. The Au-Pd, Au-Ni and Au-Co on TiO2 photocatalysts showed higher performance for H2 production (266, 256 and 171 mmol H2 mmolAu −1 h−1, respectively) compared to the Au/TiO2 material (106 mmol H2 mmolAu −1 h−1). PL results showed that the improved H2 production rate could be explained by an enhanced charge separation. The highest H2 production showed by the Au-Pd/TiO2 sample could be attributed to synergistic effects, derived from the interaction between Au and Pd particles. For the Au-Ni/TiO2 and Au-Co/TiO2 samples it is proposed that nickel or cobalt oxides worked as promoters (with additives effects) because of the formation of a p-n heterojunction.
Fil: Barrios, Celina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina. Universidad Nacional Autónoma de México; México
Fil: Albiter, E.. Universidad Nacional Autónoma de México; México
Fil: Gracia y Jimenez, J. M.. Benemérita Universidad Autónoma de Puebla; México
Fil: Tiznado, H.. Universidad Nacional Autónoma de México; México
Fil: Romo Herrera, J.. Universidad Nacional Autónoma de México; México
Fil: Zanella, R.. Universidad Nacional Autónoma de México; México
description The photocatalytic production of hydrogen on modified Au/TiO2-based photocatalysts by using water/methanol mixtures was studied. The main goal was to study the effect of surface modification of Au/TiO2 with Pd, Ni and Co on H2 production under UV light irradiation (λ ca. 254 nm). Catalysts were produced by depositing Pd, Ni or Co precursors (nitrates hydrated salts) on TiO2 (Evonik, P25) by incipient wetness impregnation followed by thermal treatment under H2 (Pd and Co) or air (Ni). Thereafter, Au was incorporated by deposition-precipitation with urea (DPU method) and then the catalysts were thermally activated again under air flow. The photocatalysts were characterized by UV?Vis diffuse reflectance, HAADF-TEM, EDXS, FTIR CO adsorption, XPS and photoluminescence. In order to obtain detailed information about the composition of the nanoparticles, high-resolution elemental analyses (EDXS line scans) were performed. The Au-Pd, Au-Ni and Au-Co on TiO2 photocatalysts showed higher performance for H2 production (266, 256 and 171 mmol H2 mmolAu −1 h−1, respectively) compared to the Au/TiO2 material (106 mmol H2 mmolAu −1 h−1). PL results showed that the improved H2 production rate could be explained by an enhanced charge separation. The highest H2 production showed by the Au-Pd/TiO2 sample could be attributed to synergistic effects, derived from the interaction between Au and Pd particles. For the Au-Ni/TiO2 and Au-Co/TiO2 samples it is proposed that nickel or cobalt oxides worked as promoters (with additives effects) because of the formation of a p-n heterojunction.
publishDate 2016
dc.date.none.fl_str_mv 2016-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/24187
Barrios, Celina; Albiter, E.; Gracia y Jimenez, J. M.; Tiznado, H.; Romo Herrera, J.; et al.; Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts; Elsevier; International Journal of Hydrogen Energy; 41; 48; 12-2016; 23287-23300
0360-3199
CONICET Digital
CONICET
url http://hdl.handle.net/11336/24187
identifier_str_mv Barrios, Celina; Albiter, E.; Gracia y Jimenez, J. M.; Tiznado, H.; Romo Herrera, J.; et al.; Photocatalytic hydrogen production over titania modified by gold – Metal (palladium, nickel and cobalt) catalysts; Elsevier; International Journal of Hydrogen Energy; 41; 48; 12-2016; 23287-23300
0360-3199
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijhydene.2016.09.206
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0360319916314926
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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