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Photoelectrochemical water splitting in separate oxygen and hydrogen cells

Landmann, Avigail and Dotan, Hen and Shter, Gennady E. and Wullenkord, Michael and Houaijia, Anis and Maljusch, Artjom and Grader, Gideon S. and Rothschild, Avner (2017) Photoelectrochemical water splitting in separate oxygen and hydrogen cells. Nature Materials. Springer. DOI: doi:10.1038/nmat4876 ISSN 1476-1122

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Official URL: http://www.nature.com/nmat/journal/vaop/ncurrent/full/nmat4876.html#access

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.

Item URL in elib:https://elib.dlr.de/111503/
Document Type:Article
Title:Photoelectrochemical water splitting in separate oxygen and hydrogen cells
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Landmann, AvigailTechnionUNSPECIFIED
Dotan, HenTechnionUNSPECIFIED
Shter, Gennady E.TechnionUNSPECIFIED
Wullenkord, MichaelMichael.Wullenkord (at) dlr.dehttps://orcid.org/0000-0002-6262-384X
Houaijia, AnisAnis.Houaijia (at) dlr.deUNSPECIFIED
Maljusch, ArtjomEvonikUNSPECIFIED
Grader, Gideon S.TechnionUNSPECIFIED
Rothschild, AvnerTechnionUNSPECIFIED
Date:13 March 2017
Journal or Publication Title:Nature Materials
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :doi:10.1038/nmat4876
Publisher:Springer
ISSN:1476-1122
Status:Published
Keywords:Chemical Engineering, Photocatalysis
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Solar Fuels
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solar Fuels (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solar Chemical Engineering
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:22 May 2017 14:55
Last Modified:08 Mar 2018 18:40

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