Andrei, Virgil, Jagt, Robert A, Rahaman, Motiar et al. (5 more authors) (2022) Long-term solar water and CO2 splitting with photoelectrochemical BiOI-BiVO 4 tandems. Nature Materials. ISSN 1476-1122
Abstract
Photoelectrochemical (PEC) devices have been developed for direct solar fuel production but the limited stability of submerged light absorbers can hamper their commercial prospects. 1,2 Here, we demonstrate photocathodes with an operational H 2 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 CO 2 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 comprising multiple-pixel BiOI photocathodes and BiVO 4 photoanodes can sustain bias-free water splitting for 240 h, while devices with a Cu 92In 8 alloy catalyst demonstrate unassisted syngas production from CO 2.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022. The Author(s), under exclusive licence to Springer Nature Limited. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 06 Jul 2022 08:30 |
Last Modified: | 02 Apr 2025 23:24 |
Published Version: | https://doi.org/10.1038/s41563-022-01262-w |
Status: | Published online |
Refereed: | Yes |
Identification Number: | 10.1038/s41563-022-01262-w |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:188744 |
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