Understanding the effect of co-doped N,Pd/TiO2 dopants on the efficiency and product selectivity of the photocatalytic CO2 reduction

Carbon dioxide photoreduction using solar energy has emerged as a promising strategy to address challenges related to climate change. TiO2 is the most used catalyst, due to its excellent properties regarding reagents adsorption, light absorption, and electron-hole pair recombination rate. Supercriti...

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Autores: Andrade Durán, Óscar, Camarillo Blas, Rafael, Martínez Navarro, Fabiola, Jiménez Izquierdo, Carlos, Rincón Zamorano, Jesusa
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/46797
Acceso en línea:https://doi.org/10.1016/j.apsusc.2024.161978
https://hdl.handle.net/10578/46797
Access Level:acceso abierto
Palabra clave:Nitrogen
Palladium
Photoreduction
Supercritical
TiO2
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spelling Understanding the effect of co-doped N,Pd/TiO2 dopants on the efficiency and product selectivity of the photocatalytic CO2 reductionAndrade Durán, ÓscarCamarillo Blas, RafaelMartínez Navarro, FabiolaJiménez Izquierdo, CarlosRincón Zamorano, JesusaNitrogenPalladiumPhotoreductionSupercriticalTiO2Carbon dioxide photoreduction using solar energy has emerged as a promising strategy to address challenges related to climate change. TiO2 is the most used catalyst, due to its excellent properties regarding reagents adsorption, light absorption, and electron-hole pair recombination rate. Supercritical synthesis allows fine-tuning of its physicochemical and photocatalytic properties by simple changes in the synthesis conditions. In this work, this technique has been used to increase the TiO2 photocatalytic activity and selectivity to methane by doping it with metal (Pd) and non-metal elements (N). Regarding the mono-doped catalysts, it has been observed that nitrogen-doped TiO2 (0.1 wt%) exhibits an improved visible light sensitization, while the palladium-doped material (1–3 wt%) leads the selectivity towards low chain fuel hydrocarbons and provides active sites for CO2 reduction. These characteristics are further improved in the TiO2-based photocatalysts co-doped with N and Pd. Specifically, band gaps of N,Pd co-doped TiO2 are 0.4–0.6 eV lower, and photogenerated charges in the co-doped catalysts are separated more efficiently due to their lower resistance to charge transfer. In the case of the co-doped photocatalysts the CO2 conversion rates are 40 % larger than mono-doped TiO2, this increase being mainly due to CH4 production, which reaches a selectivity of 60 %.202620262025info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://doi.org/10.1016/j.apsusc.2024.161978https://hdl.handle.net/10578/46797reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/467972026-05-27T07:36:41Z
dc.title.none.fl_str_mv Understanding the effect of co-doped N,Pd/TiO2 dopants on the efficiency and product selectivity of the photocatalytic CO2 reduction
title Understanding the effect of co-doped N,Pd/TiO2 dopants on the efficiency and product selectivity of the photocatalytic CO2 reduction
spellingShingle Understanding the effect of co-doped N,Pd/TiO2 dopants on the efficiency and product selectivity of the photocatalytic CO2 reduction
Andrade Durán, Óscar
Nitrogen
Palladium
Photoreduction
Supercritical
TiO2
title_short Understanding the effect of co-doped N,Pd/TiO2 dopants on the efficiency and product selectivity of the photocatalytic CO2 reduction
title_full Understanding the effect of co-doped N,Pd/TiO2 dopants on the efficiency and product selectivity of the photocatalytic CO2 reduction
title_fullStr Understanding the effect of co-doped N,Pd/TiO2 dopants on the efficiency and product selectivity of the photocatalytic CO2 reduction
title_full_unstemmed Understanding the effect of co-doped N,Pd/TiO2 dopants on the efficiency and product selectivity of the photocatalytic CO2 reduction
title_sort Understanding the effect of co-doped N,Pd/TiO2 dopants on the efficiency and product selectivity of the photocatalytic CO2 reduction
dc.creator.none.fl_str_mv Andrade Durán, Óscar
Camarillo Blas, Rafael
Martínez Navarro, Fabiola
Jiménez Izquierdo, Carlos
Rincón Zamorano, Jesusa
author Andrade Durán, Óscar
author_facet Andrade Durán, Óscar
Camarillo Blas, Rafael
Martínez Navarro, Fabiola
Jiménez Izquierdo, Carlos
Rincón Zamorano, Jesusa
author_role author
author2 Camarillo Blas, Rafael
Martínez Navarro, Fabiola
Jiménez Izquierdo, Carlos
Rincón Zamorano, Jesusa
author2_role author
author
author
author
dc.subject.none.fl_str_mv Nitrogen
Palladium
Photoreduction
Supercritical
TiO2
topic Nitrogen
Palladium
Photoreduction
Supercritical
TiO2
description Carbon dioxide photoreduction using solar energy has emerged as a promising strategy to address challenges related to climate change. TiO2 is the most used catalyst, due to its excellent properties regarding reagents adsorption, light absorption, and electron-hole pair recombination rate. Supercritical synthesis allows fine-tuning of its physicochemical and photocatalytic properties by simple changes in the synthesis conditions. In this work, this technique has been used to increase the TiO2 photocatalytic activity and selectivity to methane by doping it with metal (Pd) and non-metal elements (N). Regarding the mono-doped catalysts, it has been observed that nitrogen-doped TiO2 (0.1 wt%) exhibits an improved visible light sensitization, while the palladium-doped material (1–3 wt%) leads the selectivity towards low chain fuel hydrocarbons and provides active sites for CO2 reduction. These characteristics are further improved in the TiO2-based photocatalysts co-doped with N and Pd. Specifically, band gaps of N,Pd co-doped TiO2 are 0.4–0.6 eV lower, and photogenerated charges in the co-doped catalysts are separated more efficiently due to their lower resistance to charge transfer. In the case of the co-doped photocatalysts the CO2 conversion rates are 40 % larger than mono-doped TiO2, this increase being mainly due to CH4 production, which reaches a selectivity of 60 %.
publishDate 2025
dc.date.none.fl_str_mv 2025
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.apsusc.2024.161978
https://hdl.handle.net/10578/46797
url https://doi.org/10.1016/j.apsusc.2024.161978
https://hdl.handle.net/10578/46797
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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