Green copper oxide photocathodes using plant extracts for an efficient photoelectrochemical CO2 conversion to alcohols

In this study, green home-made synthesized copper oxide (CuO) nanoparticles are employed as photocathodes in the form of gas diffusion electrodes (GDEs) for the continuous photoelectrochemical (PEC) conversion of CO2 into valuable products, including methanol and ethanol. CuO nanoparticles synthesiz...

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Autores: Mrabet, Amena, Merino García, Iván, Perfecto-Irigaray, Maite, Beobide Pacheco, Garikoitz, Khaddor, Mohamed, Albo Sánchez, Jonathan|||0000-0001-6781-5704
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/39087
Acceso en línea:https://hdl.handle.net/10902/39087
Access Level:acceso abierto
Palabra clave:Green synthesized CuO NPs
Plant extracts
CO2 photoelectroreduction
Photocathodes
Alcohols
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spelling Green copper oxide photocathodes using plant extracts for an efficient photoelectrochemical CO2 conversion to alcoholsMrabet, AmenaMerino García, IvánPerfecto-Irigaray, MaiteBeobide Pacheco, GarikoitzKhaddor, MohamedAlbo Sánchez, Jonathan|||0000-0001-6781-5704Green synthesized CuO NPsPlant extractsCO2 photoelectroreductionPhotocathodesAlcoholsIn this study, green home-made synthesized copper oxide (CuO) nanoparticles are employed as photocathodes in the form of gas diffusion electrodes (GDEs) for the continuous photoelectrochemical (PEC) conversion of CO2 into valuable products, including methanol and ethanol. CuO nanoparticles synthesized using plant extracts from Salvia rosmarinus (CuO-R), Laurus nobilis (CuO-L), and Origanum vulgare (CuO-O) are prepared in a green, sustainable manner, leveraging the phytochemicals in these plants for nanoparticle formation and stabilization. The eco-friendly synthesized CuO-based photocathodes are then prepared by an automated spray pyrolysis deposition technique and comprehensively physico-chemically, optically, and photoelectrochemically characterized, revealing enhanced photocurrent densities and promising product selectivity for CO2 reduction to alcohols under visible light irradiation. Among the eco-synthesized photocathodes, CuO-R exhibited the highest PEC activity, achieving a Faradaic efficiency exceeding 66 % for methanol, with an energy efficiency of 39.2 %, while requiring a minimized external potential of −0.37 V (vs. RHE), lower than that for the chemically synthesized catalyst (CuO-P). Post-reaction analysis further confirmed that CuO-R maintained its structural integrity after continuous operation, reinforcing its superior stability and PEC efficiency. These results demonstrate that green synthesis pathways provide a sustainable and efficient approach to developing high-performance photocathodes for PEC CO2 reduction, offering promising potential for scalable solar-driven carbon conversion technologies.The authors gratefully acknowledge Grant PID2022–138491OB-C31 funded by MICIU/AEI/10.13039/ 501100011033 and by ERDF, EU. Ivan Merino-Garcia also acknowledges Grant RYC2023–043378-I funded by MICIU/AEI/10.13039/ 501100011033 and by ESF +.ElsevierUniversidad de Cantabria20252025-11-01journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttps://hdl.handle.net/10902/39087Journal of CO2 Utilization, 2025, 101, 103222reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/390872026-06-02T12:39:31Z
dc.title.none.fl_str_mv Green copper oxide photocathodes using plant extracts for an efficient photoelectrochemical CO2 conversion to alcohols
title Green copper oxide photocathodes using plant extracts for an efficient photoelectrochemical CO2 conversion to alcohols
spellingShingle Green copper oxide photocathodes using plant extracts for an efficient photoelectrochemical CO2 conversion to alcohols
Mrabet, Amena
Green synthesized CuO NPs
Plant extracts
CO2 photoelectroreduction
Photocathodes
Alcohols
title_short Green copper oxide photocathodes using plant extracts for an efficient photoelectrochemical CO2 conversion to alcohols
title_full Green copper oxide photocathodes using plant extracts for an efficient photoelectrochemical CO2 conversion to alcohols
title_fullStr Green copper oxide photocathodes using plant extracts for an efficient photoelectrochemical CO2 conversion to alcohols
title_full_unstemmed Green copper oxide photocathodes using plant extracts for an efficient photoelectrochemical CO2 conversion to alcohols
title_sort Green copper oxide photocathodes using plant extracts for an efficient photoelectrochemical CO2 conversion to alcohols
dc.creator.none.fl_str_mv Mrabet, Amena
Merino García, Iván
Perfecto-Irigaray, Maite
Beobide Pacheco, Garikoitz
Khaddor, Mohamed
Albo Sánchez, Jonathan|||0000-0001-6781-5704
author Mrabet, Amena
author_facet Mrabet, Amena
Merino García, Iván
Perfecto-Irigaray, Maite
Beobide Pacheco, Garikoitz
Khaddor, Mohamed
Albo Sánchez, Jonathan|||0000-0001-6781-5704
author_role author
author2 Merino García, Iván
Perfecto-Irigaray, Maite
Beobide Pacheco, Garikoitz
Khaddor, Mohamed
Albo Sánchez, Jonathan|||0000-0001-6781-5704
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv Green synthesized CuO NPs
Plant extracts
CO2 photoelectroreduction
Photocathodes
Alcohols
topic Green synthesized CuO NPs
Plant extracts
CO2 photoelectroreduction
Photocathodes
Alcohols
description In this study, green home-made synthesized copper oxide (CuO) nanoparticles are employed as photocathodes in the form of gas diffusion electrodes (GDEs) for the continuous photoelectrochemical (PEC) conversion of CO2 into valuable products, including methanol and ethanol. CuO nanoparticles synthesized using plant extracts from Salvia rosmarinus (CuO-R), Laurus nobilis (CuO-L), and Origanum vulgare (CuO-O) are prepared in a green, sustainable manner, leveraging the phytochemicals in these plants for nanoparticle formation and stabilization. The eco-friendly synthesized CuO-based photocathodes are then prepared by an automated spray pyrolysis deposition technique and comprehensively physico-chemically, optically, and photoelectrochemically characterized, revealing enhanced photocurrent densities and promising product selectivity for CO2 reduction to alcohols under visible light irradiation. Among the eco-synthesized photocathodes, CuO-R exhibited the highest PEC activity, achieving a Faradaic efficiency exceeding 66 % for methanol, with an energy efficiency of 39.2 %, while requiring a minimized external potential of −0.37 V (vs. RHE), lower than that for the chemically synthesized catalyst (CuO-P). Post-reaction analysis further confirmed that CuO-R maintained its structural integrity after continuous operation, reinforcing its superior stability and PEC efficiency. These results demonstrate that green synthesis pathways provide a sustainable and efficient approach to developing high-performance photocathodes for PEC CO2 reduction, offering promising potential for scalable solar-driven carbon conversion technologies.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-11-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10902/39087
url https://hdl.handle.net/10902/39087
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
Attribution-NonCommercial 4.0 International
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
Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv Journal of CO2 Utilization, 2025, 101, 103222
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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