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Unraveling Charge Transfer in CoFe Prussian Blue Modified BiVO4 Photoanodes
dc.contributor.author | Moss, Benjamin | |
dc.contributor.author | Hegner, Franziska | |
dc.contributor.author | Corby, Sacha | |
dc.contributor.author | Selim, Shababa | |
dc.contributor.author | Francàs Forcada, Laia | |
dc.contributor.author | López, Núria | |
dc.contributor.author | Giménez Juliá, Sixto | |
dc.contributor.author | Galan-Mascaros, Jose Ramon | |
dc.contributor.author | Durrant, James | |
dc.date.accessioned | 2019-04-16T08:09:46Z | |
dc.date.available | 2019-04-16T08:09:46Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | MOSS, Benjamin, et al. Unraveling Charge Transfer in CoFe Prussian Blue Modified BiVO4 Photoanodes. ACS Energy Letters, 2019, vol. 4, no 1, p. 337-342 | ca_CA |
dc.identifier.issn | 2380-8195 | |
dc.identifier.uri | http://hdl.handle.net/10234/182329 | |
dc.description.abstract | 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. | ca_CA |
dc.format.extent | 6 p. | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | American Chemical Society | ca_CA |
dc.relation.isPartOf | ACS Energy Letters, 2019, vol. 4, no 1 | ca_CA |
dc.rights | 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 | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | * |
dc.subject | photoanodes | |
dc.subject | Prussian blue | |
dc.subject | catalyst modification | |
dc.subject | metal oxide | |
dc.title | Unraveling Charge Transfer in CoFe Prussian Blue Modified BiVO4 Photoanodes | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | http://dx.doi.org/10.1021/acsenergylett.8b02225 | |
dc.relation.projectID | 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) | ca_CA |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca_CA |
dc.relation.publisherVersion | https://pubs.acs.org/doi/full/10.1021/acsenergylett.8b02225 | ca_CA |
dc.type.version | info:eu-repo/semantics/publishedVersion | ca_CA |
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