Long-term solar water and CO2 splitting with photoelectrochemical BiOI-BiVO4 tandems
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Authors
Andrei, Virgil
Jagt, robert
Rahaman, motiar
lari, leonardo
Lazarov, Vlado
Driscoll, Judith
Hoye, Robert
Journal Title
Nature Materials
ISSN
1476-1122
Publisher
Nature Research
Type
Article
This Version
AM
Metadata
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Andrei, V., Jagt, r., Rahaman, m., lari, l., Lazarov, V., Driscoll, J., Hoye, R., & et al. Long-term solar water and CO2 splitting with photoelectrochemical BiOI-BiVO4 tandems. Nature Materials https://doi.org/10.17863/CAM.83664
Abstract
Photoelectrochemical (PEC) devices have been developed for
direct solar fuel production, but the limited stability of
submerged light absorbers hampers their commercial
prospects.1,2 Here, we demonstrate photocathodes with an
operational H2 evolution activity over weeks, by integrating a
BiOI light absorber into a robust, oxide-based architecture with
a graphite paste conductive encapsulant. In this case, the
activity towards proton and CO2 reduction is mainly limited by
catalyst degradation. We also introduce multiple-pixel devices
as an innovative design principle for PEC systems, displaying
superior photocurrents, onset biases and stability over
corresponding conventional single-pixel devices. Accordingly,
PEC tandem devices comprised of multiple-pixel BiOI
photocathodes and BiVO4 photoanodes can sustain bias-free
water splitting for 240 h, while devices with a Cu92In8 alloy
catalyst demonstrate unassisted syngas production.
Relationships
Is supplemented by: https://doi.org/10.17863/CAM.82399
Sponsorship
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (839763)
Embargo Lift Date
2025-04-19
Identifiers
This record's DOI: https://doi.org/10.17863/CAM.83664
This record's URL: https://www.repository.cam.ac.uk/handle/1810/336245
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