Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting

The efficient integration of photoactive and catalytic materials is key to promoting photoelectrochemical water splitting as a sustainable energy technology built on solar power. Here, we report highly stable water splitting photoanodes from BiVO4 photoactive cores decorated with CoFe Prussian blue-...

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Autores: Hegner, Franziska Simone, Herraiz-Cardona, Isaac, Cardenas-Morcoso, Drialys, López, Núria, Galán-Mascarós, José-Ramón, Gimenez, Sixto
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2017
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2072/359755
Acesso em linha:http://hdl.handle.net/2072/359755
https://doi.org/10.1021/acsami.7b09449
Access Level:acceso abierto
Palavra-chave:54
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spelling Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water SplittingHegner, Franziska SimoneHerraiz-Cardona, IsaacCardenas-Morcoso, DrialysLópez, NúriaGalán-Mascarós, José-RamónGimenez, Sixto54The efficient integration of photoactive and catalytic materials is key to promoting photoelectrochemical water splitting as a sustainable energy technology built on solar power. Here, we report highly stable water splitting photoanodes from BiVO4 photoactive cores decorated with CoFe Prussian blue-type electrocatalysts (CoFe-PB). This combination decreases the onset potential of BiVO4 by ∼0.8 V (down to 0.3 V vs reversible hydrogen electrode (RHE)) and increases the photovoltage by 0.45 V. The presence of the catalyst also leads to a remarkable 6-fold enhancement of the photocurrent at 1.23 V versus RHE, while keeping the light-harvesting ability of BiVO4. Structural and mechanistic studies indicate that CoFe-PB effectively acts as a true catalyst on BiVO4. This mechanism, stemming from the adequate alignment of the energy levels, as showed by density functional theory calculations, allows CoFe-PB to outperform all previous catalyst/BiVO4 junctions and, in addition, leads to noteworthy longterm stability. A bare 10−15% decrease in photocurrent was observed after more than 50 h of operation under light irradiation2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion37671 p.application/pdfhttp://hdl.handle.net/2072/359755https://doi.org/10.1021/acsami.7b09449RECERCAT (Dipòsit de la Recerca de Catalunya)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)Inglésinfo:eu-repo/grantAgreement/EC/FP7/279313L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2072/3597552026-05-29T05:05:01Z
dc.title.none.fl_str_mv Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting
title Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting
spellingShingle Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting
Hegner, Franziska Simone
54
title_short Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting
title_full Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting
title_fullStr Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting
title_full_unstemmed Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting
title_sort Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting
dc.creator.none.fl_str_mv Hegner, Franziska Simone
Herraiz-Cardona, Isaac
Cardenas-Morcoso, Drialys
López, Núria
Galán-Mascarós, José-Ramón
Gimenez, Sixto
author Hegner, Franziska Simone
author_facet Hegner, Franziska Simone
Herraiz-Cardona, Isaac
Cardenas-Morcoso, Drialys
López, Núria
Galán-Mascarós, José-Ramón
Gimenez, Sixto
author_role author
author2 Herraiz-Cardona, Isaac
Cardenas-Morcoso, Drialys
López, Núria
Galán-Mascarós, José-Ramón
Gimenez, Sixto
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv 54
topic 54
description The efficient integration of photoactive and catalytic materials is key to promoting photoelectrochemical water splitting as a sustainable energy technology built on solar power. Here, we report highly stable water splitting photoanodes from BiVO4 photoactive cores decorated with CoFe Prussian blue-type electrocatalysts (CoFe-PB). This combination decreases the onset potential of BiVO4 by ∼0.8 V (down to 0.3 V vs reversible hydrogen electrode (RHE)) and increases the photovoltage by 0.45 V. The presence of the catalyst also leads to a remarkable 6-fold enhancement of the photocurrent at 1.23 V versus RHE, while keeping the light-harvesting ability of BiVO4. Structural and mechanistic studies indicate that CoFe-PB effectively acts as a true catalyst on BiVO4. This mechanism, stemming from the adequate alignment of the energy levels, as showed by density functional theory calculations, allows CoFe-PB to outperform all previous catalyst/BiVO4 junctions and, in addition, leads to noteworthy longterm stability. A bare 10−15% decrease in photocurrent was observed after more than 50 h of operation under light irradiation
publishDate 2017
dc.date.none.fl_str_mv 2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/2072/359755
https://doi.org/10.1021/acsami.7b09449
url http://hdl.handle.net/2072/359755
https://doi.org/10.1021/acsami.7b09449
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/EC/FP7/279313
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 37671 p.
application/pdf
dc.source.none.fl_str_mv RECERCAT (Dipòsit de la Recerca de Catalunya)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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