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Optimized photoelectrochemical tandem cell for solar water splitting

Vilanova, António and Lopes, Tânia and Spenke, Carsten and Wullenkord, Michael and Mendes, Adélio (2018) Optimized photoelectrochemical tandem cell for solar water splitting. Energy Storage Materials, 13, pp. 175-188. Elsevier. doi: 10.1016/j.ensm.2017.12.017. ISSN 2405-8297.

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Official URL: https://www.sciencedirect.com/science/article/pii/S2405829717303987


In the field of photoelectrochemical (PEC) hydrogen production most studies focus on developing efficient nanostructured materials and less attention is given to the optimization of PEC devices. However, the reactor design greatly influences the overall performance of these devices and it is a key element to turn PEC hydrogen generation competitive and marketable. In this work, a 50 cm2 tandem PEC-PV cell, named CoolPEC cell (compact, optimized, open light PEC cell), was designed and optimized for continuous operation comprising improved key features: i) an open path for the sunlight to reach a PV cell placed at the back of the PEC cell; ii) a photoelectrode that simultaneously is one of the windows of the cell; iii) an integrated manifold to feed the electrolyte. CFD simulations were performed to improve the reactor design assuring good heat dissipation and an efficient collection of evolved oxygen and hydrogen in separated compartments. The CoolPEC cell presented a stable performance over 42 days (1008 h) in a continuous operation mode. The 50 cm2 hematite photoelectrode produced ca. 0.45 mA cm−2 at a bias potential of 1.6 V provided by two silicon heterojunction (SHJ) solar cells, under 1000 W m−2 and with constant electrolyte feeding at 45 °C. SEM, EDS and ICP analyses confirmed that the hematite photoelectrode was resistant to the accelerated corrosion promoted by the operating conditions.

Item URL in elib:https://elib.dlr.de/119597/
Document Type:Article
Title:Optimized photoelectrochemical tandem cell for solar water splitting
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Spenke, Carstencarsten.spenke (at) dlr.deUNSPECIFIED
Wullenkord, MichaelMichael.Wullenkord (at) dlr.dehttps://orcid.org/0000-0002-6262-384X
Date:March 2018
Journal or Publication Title:Energy Storage Materials
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.ensm.2017.12.017
Page Range:pp. 175-188
Keywords:phtoelctrochemistry, hydrogen production, solar, water Splitting
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Solar Fuels
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
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:11 Apr 2018 14:48
Last Modified:21 Sep 2019 05:05

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