Cited by 572Advanced Photocatalysis TechniquesIron oxide chemistry and applicationsElectrocatalysts for Energy Conversion

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Photoelectrochemical water splitting in separate oxygen and hydrogen cells

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Landman, Avigail, Dotan, Hen, Shter, Gennady E., Wullenkord, Michael, Houaijia, Anis, Maljusch, Artjom, Grader, Gideon S., Rothschild, Avner·2017·Nature Materials

DOI 10.1038/nmat4876

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Abstract

Solar water splitting provides a promising path for sustainable hydrogen production and solar energy storage. One of the greatest challenges towards large-scale utilization of this technology is reducing the hydrogen production cost. The conventional electrolyser architecture, where hydrogen and oxygen are co-produced in the same cell, gives rise to critical challenges in photoelectrochemical water splitting cells that directly convert solar energy and water to hydrogen. Here we overcome these challenges by separating the hydrogen and oxygen cells. The ion exchange in our cells is mediated by auxiliary electrodes, and the cells are connected to each other only by metal wires, enabling centralized hydrogen production. We demonstrate hydrogen generation in separate cells with solar-to-hydrogen conversion efficiency of 7.5%, which can readily surpass 10% using standard commercial components. A basic cost comparison shows that our approach is competitive with conventional photoelectrochemical systems, enabling safe and potentially affordable solar hydrogen production.

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Authors: Landman, A., Dotan, H., Shter, G. E., Wullenkord, M., Houaijia, A., Maljusch, A., Grader, G. S., & Rothschild, A.
Affiliations: Technion – Israel Institute of Technology (IL)
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR) (DE)
Evonik (Germany) (DE)
Corresponding author: Grader, Gideon S.
Rothschild, Avner
ORCID: Landman, Avigail
Shter, Gennady E.
Wullenkord, Michael
Grader, Gideon S.
Rothschild, Avner
Venue: Nature Materials
Publisher: Springer Science and Business Media LLC
Published: 2017-03-13
Volume: 16
Issue: 6
Pages: 646-651
ISSN: 1476-1122 (ISSN-L)
1476-4660
DOI: 10.1038/nmat4876
OpenAlex: W2595002228
Cited by: 572
References: 36
Citations by year: 2026: 36 · 2025: 69 · 2024: 66 · 2023: 67 · 2022: 70 · 2021: 73 · 2020: 67 · 2019: 65 · 2018: 46 · 2017: 13
FWCI: 13.99
Type: journal article
Language: en
Open access: green
arxiv.org
Licence: www.springer.com/tdm (tdm)
www.springer.com/tdm (vor)
Locations: Nature Materials (publishedVersion)
PubMed (publishedVersion)
elib (German Aerospace Center) (acceptedVersion)
arXiv (Cornell University) (submittedVersion)
arXiv (Cornell University)
Topics: Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
Physical Sciences › Materials Science › Materials Chemistry › Iron oxide chemistry and applications
Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
Keywords: photoelectrochemical water splitting, solar hydrogen production, auxiliary electrode, ion exchange, solar-to-hydrogen efficiency, hydrogen production cost, solar energy storage

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Photoelectrochemical water splitting in separate oxygen and hydrogen cells

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