Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering

The optimization of multiple interfaces in hematite (α-Fe₂O₃) based composites for photoelectrochemical water splitting to facilitate charge transport in the bulk is of paramount importance to obtain enhanced solar-to-fuel efficiency. Herein, we report the fabrication of ITO/Fe₂O₃/Fe₂TiO₅/FeNiOOH mu...

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Autores: Tang, PengYi|||0000-0002-2306-095X, Xie, Haibing|||0000-0002-5070-2882, Ros, Carles|||0000-0002-9148-2767, Han, Lijuan, Biset-Peiró, Martí|||0000-0002-1255-7733, He, Yong-Min, Kramer, W., Pérez-Rodríguez, Alejandro, Saucedo, Edgardo, Galán-Mascarós, José Ramón|||0000-0001-7983-9762, Andreu, Teresa|||0000-0002-2804-4545, Morante, Joan Ramon|||0000-0002-4981-4633, Arbiol i Cobos, Jordi|||0000-0002-0695-1726
Formato: artículo
Fecha de publicación:2017
País:España
Recursos:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:194902
Acesso em linha:https://ddd.uab.cat/record/194902
https://dx.doi.org/urn:doi:10.1039/c7ee01475a
Access Level:acceso abierto
Palavra-chave:Electrochemical investigations
Epitaxial relationships
Interfacial couplings
Multilayer nanowires
Photoelectrochemical water splitting
Surface state density
Surface-state energies
Systematic experiment
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spelling Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineeringTang, PengYi|||0000-0002-2306-095XXie, Haibing|||0000-0002-5070-2882Ros, Carles|||0000-0002-9148-2767Han, LijuanBiset-Peiró, Martí|||0000-0002-1255-7733He, Yong-MinKramer, W.Pérez-Rodríguez, AlejandroSaucedo, EdgardoGalán-Mascarós, José Ramón|||0000-0001-7983-9762Andreu, Teresa|||0000-0002-2804-4545Morante, Joan Ramon|||0000-0002-4981-4633Arbiol i Cobos, Jordi|||0000-0002-0695-1726Electrochemical investigationsEpitaxial relationshipsInterfacial couplingsMultilayer nanowiresPhotoelectrochemical water splittingSurface state densitySurface-state energiesSystematic experimentThe optimization of multiple interfaces in hematite (α-Fe₂O₃) based composites for photoelectrochemical water splitting to facilitate charge transport in the bulk is of paramount importance to obtain enhanced solar-to-fuel efficiency. Herein, we report the fabrication of ITO/Fe₂O₃/Fe₂TiO₅/FeNiOOH multi-layer nanowires and a series of systematic experiments designed to elucidate the mechanism underlying the interfacial coupling effect of the quaternary hematite composite. The hierarchical ITO/Fe₂O₃/Fe₂TiO₅/FeNiOOH nanowires display photocurrents that are more than an order of magnitude greater than those of pristine Fe₂O₃ nanowires (from 0.205 mAcm⁻² to 2.2 mAcm⁻² at 1.23 V vs. RHE and 1 Sun), and higher than those of most of the recently reported state-of-the-art hematite composites. Structural, compositional and electrochemical investigations disclose that the surface states (SS) are finely regulated via the atomic addition of an Fe₂TiO₅ layer and FeNiOOH nanodots, while the upgrading of back contact conductivity and charge donor densities originate from the epitaxial relationship and enhanced Sn doping contributed from the ITO underlayer. We attribute the superior water oxidation performance to the interfacial coupling effect of the ITO underlayer (Sn doping and back contact conductivity promoter), the atomic level Fe₂TiO₅ coating (Ti doping, surface state density and energy level modulation) and the FeNiOOH nanodot electrocatalyst (regulating surface state energy level). Our work suggests an effective pathway for rational designing of highly active and cost-effective integrated photoanodes for photoelectrochemical water splitting. 22017-01-0120172017-01-01Articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/194902https://dx.doi.org/urn:doi:10.1039/c7ee01475areponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengMinisterio de Economía y Competitividad https://doi.org/10.13039/501100003329 ENE2016-80788-C5Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 CTQ2015-71287-RMinisterio de Economía y Competitividad https://doi.org/10.13039/501100003329 MAT2014-59961-C2Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2013-0319Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2013-0295Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2014/SGR-1638Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2014/SGR-797open accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:1949022026-06-06T12:50:31Z
dc.title.none.fl_str_mv Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering
title Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering
spellingShingle Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering
Tang, PengYi|||0000-0002-2306-095X
Electrochemical investigations
Epitaxial relationships
Interfacial couplings
Multilayer nanowires
Photoelectrochemical water splitting
Surface state density
Surface-state energies
Systematic experiment
title_short Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering
title_full Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering
title_fullStr Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering
title_full_unstemmed Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering
title_sort Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering
dc.creator.none.fl_str_mv Tang, PengYi|||0000-0002-2306-095X
Xie, Haibing|||0000-0002-5070-2882
Ros, Carles|||0000-0002-9148-2767
Han, Lijuan
Biset-Peiró, Martí|||0000-0002-1255-7733
He, Yong-Min
Kramer, W.
Pérez-Rodríguez, Alejandro
Saucedo, Edgardo
Galán-Mascarós, José Ramón|||0000-0001-7983-9762
Andreu, Teresa|||0000-0002-2804-4545
Morante, Joan Ramon|||0000-0002-4981-4633
Arbiol i Cobos, Jordi|||0000-0002-0695-1726
author Tang, PengYi|||0000-0002-2306-095X
author_facet Tang, PengYi|||0000-0002-2306-095X
Xie, Haibing|||0000-0002-5070-2882
Ros, Carles|||0000-0002-9148-2767
Han, Lijuan
Biset-Peiró, Martí|||0000-0002-1255-7733
He, Yong-Min
Kramer, W.
Pérez-Rodríguez, Alejandro
Saucedo, Edgardo
Galán-Mascarós, José Ramón|||0000-0001-7983-9762
Andreu, Teresa|||0000-0002-2804-4545
Morante, Joan Ramon|||0000-0002-4981-4633
Arbiol i Cobos, Jordi|||0000-0002-0695-1726
author_role author
author2 Xie, Haibing|||0000-0002-5070-2882
Ros, Carles|||0000-0002-9148-2767
Han, Lijuan
Biset-Peiró, Martí|||0000-0002-1255-7733
He, Yong-Min
Kramer, W.
Pérez-Rodríguez, Alejandro
Saucedo, Edgardo
Galán-Mascarós, José Ramón|||0000-0001-7983-9762
Andreu, Teresa|||0000-0002-2804-4545
Morante, Joan Ramon|||0000-0002-4981-4633
Arbiol i Cobos, Jordi|||0000-0002-0695-1726
author2_role author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Electrochemical investigations
Epitaxial relationships
Interfacial couplings
Multilayer nanowires
Photoelectrochemical water splitting
Surface state density
Surface-state energies
Systematic experiment
topic Electrochemical investigations
Epitaxial relationships
Interfacial couplings
Multilayer nanowires
Photoelectrochemical water splitting
Surface state density
Surface-state energies
Systematic experiment
description The optimization of multiple interfaces in hematite (α-Fe₂O₃) based composites for photoelectrochemical water splitting to facilitate charge transport in the bulk is of paramount importance to obtain enhanced solar-to-fuel efficiency. Herein, we report the fabrication of ITO/Fe₂O₃/Fe₂TiO₅/FeNiOOH multi-layer nanowires and a series of systematic experiments designed to elucidate the mechanism underlying the interfacial coupling effect of the quaternary hematite composite. The hierarchical ITO/Fe₂O₃/Fe₂TiO₅/FeNiOOH nanowires display photocurrents that are more than an order of magnitude greater than those of pristine Fe₂O₃ nanowires (from 0.205 mAcm⁻² to 2.2 mAcm⁻² at 1.23 V vs. RHE and 1 Sun), and higher than those of most of the recently reported state-of-the-art hematite composites. Structural, compositional and electrochemical investigations disclose that the surface states (SS) are finely regulated via the atomic addition of an Fe₂TiO₅ layer and FeNiOOH nanodots, while the upgrading of back contact conductivity and charge donor densities originate from the epitaxial relationship and enhanced Sn doping contributed from the ITO underlayer. We attribute the superior water oxidation performance to the interfacial coupling effect of the ITO underlayer (Sn doping and back contact conductivity promoter), the atomic level Fe₂TiO₅ coating (Ti doping, surface state density and energy level modulation) and the FeNiOOH nanodot electrocatalyst (regulating surface state energy level). Our work suggests an effective pathway for rational designing of highly active and cost-effective integrated photoanodes for photoelectrochemical water splitting.
publishDate 2017
dc.date.none.fl_str_mv 2
2017-01-01
2017
2017-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/194902
https://dx.doi.org/urn:doi:10.1039/c7ee01475a
url https://ddd.uab.cat/record/194902
https://dx.doi.org/urn:doi:10.1039/c7ee01475a
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 ENE2016-80788-C5
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 CTQ2015-71287-R
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 MAT2014-59961-C2
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2013-0319
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2013-0295
Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2014/SGR-1638
Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2014/SGR-797
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
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
https://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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