2024-03-29T01:39:53Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1745412022-12-01T11:23:00Zcom_10234_160292com_10234_9col_10234_160293
Repositori UJI
author
Hegner, Franziska
author
Herraiz Cardona, Isaac
author
Cardenas-Morcoso, Drialys
author
López, Núria
author
Galan-Mascaros, Jose Ramon
author
Gimenez, Sixto
funder
We would like to acknowledge financial support from the University Jaume I through the P11B2014-51 project, and from the Generalitat Valenciana through the Santiago Grisolia Program, grant 2015-031. Serveis Centrals at UJI (SCIC) are also acknowledged. This work was also supported by the European Union (project ERC StG grant CHEMCOMP no. 279313); the Spanish Ministerio de Economía y Competitividad (MINECO) through projects CTQ2015-71287-R, CTQ2015-68770-R, and the Severo Ochoa Excellence Accreditation 2014-2018 SEV-2013-0319; the Generalitat de Catalunya (2014SGR-797 and 2014SGR-199), and the CERCA Programme/Generalitat de Catalunya. Additionally, the “LaCaixa”-Severo Ochoa International Programme of Ph.D. Scholarships (Programa internacional de Becas “LaCaixa”-Severo Ochoa) is acknowledged for F.S. Hegner’s predoctoral grant. We thank BSC-RES for generous computational resources.
2018-05-08T07:19:26Z
2018-05-08T07:19:26Z
2017-11-01
HEGNER, Franziska Simone, et al. Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting. ACS applied materials & interfaces, 2017, vol. 9, no 43, p. 37671-37681
1944-82441944-8252
http://hdl.handle.net/10234/174541
http://dx.doi.org/10.1021/acsami.7b09449
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.
eng
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.
photoelectrocatalysis
water splitting
oxygen evolution
electrochemistry
computational chemistry
Prussian blue
Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting
info:eu-repo/semantics/article
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