Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting
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Other documents of the author: Hegner, Franziska; Herraiz Cardona, Isaac; Cardenas-Morcoso, Drialys; López, Núria; Galan-Mascaros, Jose Ramon; Giménez Juliá, Sixto
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comunitat-uji-handle2:10234/160292
comunitat-uji-handle3:10234/160293
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Title
Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water SplittingAuthor (s)
Date
2017-11-01ISSN
1944-8244; 1944-8252Bibliographic citation
HEGNER, Franziska Simone, et al. Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting. ACS applied materials & interfaces, 2017, vol. 9, no 43, p. 37671-37681Type
info:eu-repo/semantics/articlePublisher version
https://pubs.acs.org/doi/10.1021/acsami.7b09449Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
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 ... [+]
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,similar to 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 long-term stability. A bare 10-15% decrease in photocurrent was observed after more than 50 h of operation under light irradiation. [-]
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ACS applied materials & interfaces, 2017, vol. 9, no 43Investigation project
University Jaume I: P11B2014-51; Generalitat Valenciana through the Santiago Grisolia Program: 2015-031; European Union (project ERC StG grant CHEMCOMP): 279313; Spanish Ministerio de Economia y Competitividad (MINECO): CTQ2015-71287-R, CTQ2015-68770-R; Severo Ochoa Excellence Accreditation: SEV-2013-0319; Generalitat de Catalunya: 2014SGR-797 2014SGR-199; CERCA Programme/Generalitat de Catalunya; "LaCaixa"-Severo Ochoa International Programme of Ph.D. Scholarships (Programa internacional de Becas "LaCaixa"-Severo Ochoa)Rights
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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