Electrodeposited BiVO4-based photoanodes for an energy-efficient photo-assisted CO2-to-formate conversion
The development of efficient photoanodes that reduce external energy requirements for the electrochemical conversion of CO2 to formate is essential for the future implementation of this technology. In this work, we explore different photoanode structures based on electrodeposited BiVO4 onto transpar...
| Autores: | , , , , , , , , |
|---|---|
| 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:10902/36388 |
| Acceso en línea: | https://hdl.handle.net/10902/36388 |
| Access Level: | acceso abierto |
| Palabra clave: | CO2 photoelectroreduction BiVO4 photoanodes Electrodeposition Formate Energy efficiency |
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Electrodeposited BiVO4-based photoanodes for an energy-efficient photo-assisted CO2-to-formate conversionAbarca González, José Antonio|||0000-0003-0120-8682Molera, MartíMerino García, IvánDíaz Sainz, GuillermoIrabien Gulías, Ángel|||0000-0002-2411-4163Solla Gullón, JoséFàbrega, CristianAndreu Hernández, María TeresaAlbo Sánchez, Jonathan|||0000-0001-6781-5704CO2 photoelectroreductionBiVO4 photoanodesElectrodepositionFormateEnergy efficiencyThe development of efficient photoanodes that reduce external energy requirements for the electrochemical conversion of CO2 to formate is essential for the future implementation of this technology. In this work, we explore different photoanode structures based on electrodeposited BiVO4 onto transparent FTO substrates to achieve a more efficient PEC reduction of CO2. Among the tested structures, the photoanode incorporating a Bi2O3 underlayer, which enhances the BiVO4-FTO interface by reducing electron-hole recombination, exhibits the best PEC performance. Integrating this photoanode into a CO2 photoelectrolyzer with back visible light illumination achieves an impressive current density of −29 mA cm−2 at constant −1.8 V (vs. Ag/AgCl). Using a Bi/C GDE as the cathode, the system produces up to 56.2 g L−1 of formate with a Faradaic efficiency of 96 %. In terms of energy performance, illuminating the photoanode reduces energy consumption by nearly 40 %, bringing it down to 317 kWh kmol−1, with an energy efficiency of 38 %. The external bias can be further decreased by increasing the irradiation intensity to 2.5 suns using concentrated solar light, resulting in an additional 10 % reduction in energy consumption (290 kWh kmol−1), while maintaining high conversion efficiencies for CO2 to formate (over 95 % Faradaic efficiency). Besides, energy efficiency improves by 12 %, as the cathodic potential is reduced to −1.65 V (vs. Ag/AgCl). These results represent significant progress in reducing the external bias required for CO2 to formate conversion in PEC systems, marking a step toward the industrial application of CO2 conversion technology.The authors gratefully acknowledge Grant TED2021-129810B-C21 and PLEC2022-009398 funded by MICIU/AEI/10.13039/501100011033/ and by the “European Union NextGenerationEU/PRTR”, and Grants PID2022-138491OB-C31, PID2022-138491OB-C32 and PID2022-138491OB-C33 funded by MICIU/AEI/10.13039/501100011033 and by “ERDF/EU”. This project has received funding from the European Union’s Horizon Europe research and innovation programme under grant agreement No 101118265. Marti Molera acknowledges AGAUR-Generalitat de Catalunya for 2024 FI-1 00421 predoctoral grant. The authors thank Dr. Julià Lopez Vidrier for the access to the UV–vis equipment. Jose Antonio Abarca gratefully acknowledges the predoctoral research grant (FPI) PRE2021-097200. Ivan Merino-Garcia also acknowledges Grant RYC2023-043378-I funded by MICIU/AEI/10.13039/ 501100011033 and by ESF +.ElsevierUniversidad de Cantabria20252025-06-15journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttps://hdl.handle.net/10902/36388Chemical Engineering Journal, 2025, 514, 16334828th International Symposium on Chemical Reaction Engineering (ISCRE), Turku/Åbo Finland, 2024reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/363882026-06-02T12:39:31Z |
| dc.title.none.fl_str_mv |
Electrodeposited BiVO4-based photoanodes for an energy-efficient photo-assisted CO2-to-formate conversion |
| title |
Electrodeposited BiVO4-based photoanodes for an energy-efficient photo-assisted CO2-to-formate conversion |
| spellingShingle |
Electrodeposited BiVO4-based photoanodes for an energy-efficient photo-assisted CO2-to-formate conversion Abarca González, José Antonio|||0000-0003-0120-8682 CO2 photoelectroreduction BiVO4 photoanodes Electrodeposition Formate Energy efficiency |
| title_short |
Electrodeposited BiVO4-based photoanodes for an energy-efficient photo-assisted CO2-to-formate conversion |
| title_full |
Electrodeposited BiVO4-based photoanodes for an energy-efficient photo-assisted CO2-to-formate conversion |
| title_fullStr |
Electrodeposited BiVO4-based photoanodes for an energy-efficient photo-assisted CO2-to-formate conversion |
| title_full_unstemmed |
Electrodeposited BiVO4-based photoanodes for an energy-efficient photo-assisted CO2-to-formate conversion |
| title_sort |
Electrodeposited BiVO4-based photoanodes for an energy-efficient photo-assisted CO2-to-formate conversion |
| dc.creator.none.fl_str_mv |
Abarca González, José Antonio|||0000-0003-0120-8682 Molera, Martí Merino García, Iván Díaz Sainz, Guillermo Irabien Gulías, Ángel|||0000-0002-2411-4163 Solla Gullón, José Fàbrega, Cristian Andreu Hernández, María Teresa Albo Sánchez, Jonathan|||0000-0001-6781-5704 |
| author |
Abarca González, José Antonio|||0000-0003-0120-8682 |
| author_facet |
Abarca González, José Antonio|||0000-0003-0120-8682 Molera, Martí Merino García, Iván Díaz Sainz, Guillermo Irabien Gulías, Ángel|||0000-0002-2411-4163 Solla Gullón, José Fàbrega, Cristian Andreu Hernández, María Teresa Albo Sánchez, Jonathan|||0000-0001-6781-5704 |
| author_role |
author |
| author2 |
Molera, Martí Merino García, Iván Díaz Sainz, Guillermo Irabien Gulías, Ángel|||0000-0002-2411-4163 Solla Gullón, José Fàbrega, Cristian Andreu Hernández, María Teresa Albo Sánchez, Jonathan|||0000-0001-6781-5704 |
| author2_role |
author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Universidad de Cantabria |
| dc.subject.none.fl_str_mv |
CO2 photoelectroreduction BiVO4 photoanodes Electrodeposition Formate Energy efficiency |
| topic |
CO2 photoelectroreduction BiVO4 photoanodes Electrodeposition Formate Energy efficiency |
| description |
The development of efficient photoanodes that reduce external energy requirements for the electrochemical conversion of CO2 to formate is essential for the future implementation of this technology. In this work, we explore different photoanode structures based on electrodeposited BiVO4 onto transparent FTO substrates to achieve a more efficient PEC reduction of CO2. Among the tested structures, the photoanode incorporating a Bi2O3 underlayer, which enhances the BiVO4-FTO interface by reducing electron-hole recombination, exhibits the best PEC performance. Integrating this photoanode into a CO2 photoelectrolyzer with back visible light illumination achieves an impressive current density of −29 mA cm−2 at constant −1.8 V (vs. Ag/AgCl). Using a Bi/C GDE as the cathode, the system produces up to 56.2 g L−1 of formate with a Faradaic efficiency of 96 %. In terms of energy performance, illuminating the photoanode reduces energy consumption by nearly 40 %, bringing it down to 317 kWh kmol−1, with an energy efficiency of 38 %. The external bias can be further decreased by increasing the irradiation intensity to 2.5 suns using concentrated solar light, resulting in an additional 10 % reduction in energy consumption (290 kWh kmol−1), while maintaining high conversion efficiencies for CO2 to formate (over 95 % Faradaic efficiency). Besides, energy efficiency improves by 12 %, as the cathodic potential is reduced to −1.65 V (vs. Ag/AgCl). These results represent significant progress in reducing the external bias required for CO2 to formate conversion in PEC systems, marking a step toward the industrial application of CO2 conversion technology. |
| publishDate |
2025 |
| dc.date.none.fl_str_mv |
2025 2025-06-15 |
| 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/10902/36388 |
| url |
https://hdl.handle.net/10902/36388 |
| 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 4.0 International http://creativecommons.org/licenses/by/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 4.0 International http://creativecommons.org/licenses/by/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 |
Chemical Engineering Journal, 2025, 514, 163348 28th International Symposium on Chemical Reaction Engineering (ISCRE), Turku/Åbo Finland, 2024 reponame:UCrea Repositorio Abierto de la Universidad de Cantabria instname:Universidad de Cantabria (UC) |
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Universidad de Cantabria (UC) |
| reponame_str |
UCrea Repositorio Abierto de la Universidad de Cantabria |
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UCrea Repositorio Abierto de la Universidad de Cantabria |
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| repository.mail.fl_str_mv |
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1869415609142345728 |
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15,811543 |