Unraveling Charge Transfer in CoFe Prussian Blue Modified BiVO4 Photoanodes
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Altres documents de l'autoria: Moss, Benjamin; Hegner, Franziska; Corby, Sacha; Selim, Shababa; Francàs Forcada, Laia; López, Núria; Gimenez, Sixto; Galan-Mascaros, Jose Ramon; Durrant, James
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/160292
comunitat-uji-handle3:10234/160293
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INVESTIGACIONMetadades
Títol
Unraveling Charge Transfer in CoFe Prussian Blue Modified BiVO4 PhotoanodesAutoria
Data de publicació
2019Editor
American Chemical SocietyISSN
2380-8195Cita bibliogràfica
MOSS, Benjamin, et al. Unraveling Charge Transfer in CoFe Prussian Blue Modified BiVO4 Photoanodes. ACS Energy Letters, 2019, vol. 4, no 1, p. 337-342Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://pubs.acs.org/doi/full/10.1021/acsenergylett.8b02225Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
Catalyst modification of metal oxide photoanodes can result in markedly improved water oxidation efficiency. However, the reasons for improvement are often subtle and controversial. Upon depositing a CoFe Prussian ... [+]
Catalyst modification of metal oxide photoanodes can result in markedly improved water oxidation efficiency. However, the reasons for improvement are often subtle and controversial. Upon depositing a CoFe Prussian blue (CoFe-PB) water oxidation catalyst on BiVO4, a large photocurrent increase and onset potential shift (up to 0.8 V) are observed, resulting in a substantially more efficient system with high stability. To elucidate the origin of this enhancement, we used time-resolved spectroscopies to compare the dynamics of photogenerated holes in modified and unmodified BiVO4 films. Even in the absence of strong positive bias, a fast (pre-ms), largely irreversible hole transfer from BiVO4 to CoFe-PB is observed. This process retards recombination, enabling holes to accumulate in the catalyst. Holes in CoFe-PB remain reactive, oxidizing water at a similar rate to holes in pristine BiVO4. CoFe-PB therefore enhances performance by presenting a favorable interface for efficient hole transfer, combined with the catalytic function necessary to drive water oxidation. [-]
Publicat a
ACS Energy Letters, 2019, vol. 4, no 1Proyecto de investigación
European Union's Horizon 2020 project A-LEAF: 732840; Spanish Ministerio de Economia y Competitividad (MINECO): CTQ2015-71287-R, CTQ2015-68770-R, ENE2017-85087-C3-1-R; Generalitat de Catalunya: 2017-SGR-1406 2014SGR-199 CERCA Programme/Generalitat de Catalunya; "LaCaixa"-Severo Ochoa International Programme of Ph.D. Scholarships; Engineering and Physical Sciences Research Council (EPSRC)Drets d'accés
ACS AuthorChoice - This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes
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info:eu-repo/semantics/openAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
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