A metal-organic framework converted catalyst that boosts photo-electrochemical water splitting
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Other documents of the author: Cardenas-Morcoso, Drialys; Ifraemov, Raya; García-Tecedor, Miguel; Liberman, Itamar; Gimenez, Sixto; Hod, Idan
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comunitat-uji-handle2:10234/160292
comunitat-uji-handle3:10234/160293
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Title
A metal-organic framework converted catalyst that boosts photo-electrochemical water splittingAuthor (s)
Date
2019-04-08Publisher
Royal Society of ChemistryBibliographic citation
CARDENAS-MORCOSO, Drialys, et al. A metal–organic framework converted catalyst that boosts photo-electrochemical water splitting. Journal of Materials Chemistry A, 2019, 7.18: 11143-11149.Type
info:eu-repo/semantics/articlePublisher version
https://pubs.rsc.org/en/content/articlehtml/2019/ta/c9ta01559kVersion
info:eu-repo/semantics/acceptedVersionSubject
Abstract
Realization of photo-electrochemical water splitting to generate H2 alternative fuel requires the facilitation of the kinetically-sluggish oxygen evolution reaction (OER) occurring at the photoanode. To do so, there ... [+]
Realization of photo-electrochemical water splitting to generate H2 alternative fuel requires the facilitation of the kinetically-sluggish oxygen evolution reaction (OER) occurring at the photoanode. To do so, there is a need to develop new methods to assemble suitable OER co-catalysts at the semiconductor–solution interface. Although Metal–Organic Frameworks (MOFs) are frequently used as precursor materials to synthesize high surface area, effective OER electrocatalysts, until now their utilization as co-catalysts in a working photo-electrochemical cell (PEC) has remained underexplored. As a proof-of-concept, here we provide a simple route for modification of BiVO4-based photoanodes with highly-active porous cobalt-oxide co-catalysts, converted from a cobalt–imidazolium MOF (ZIF-67). Photo-electrochemical and impedance spectroscopy analysis reveal that the co-catalyst significantly accelerates photoanodic OER (rather than serving as a surface passivation layer), and thus greatly improves the overall PEC performance. Hence, given the chemical flexibility of MOFs, this work provides a new tool-kit for designing efficient water splitting PECs. [-]
Investigation project
Spanish Ministerio de Ciencia, Innovación y Universidades (project ENE2017-85087-C3-1-R) ; Israel Science Foundation (ISF) (Grant No. 306/18)Rights
© The Royal Society of Chemistry 2019
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