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Synthesis and Thermodynamics of Perovskite Solid Solutions as Redox Materials for Solar-Thermochemical Processes

Vieten, Josua and Roeb, Martin and Sattler, Christian (2018) Synthesis and Thermodynamics of Perovskite Solid Solutions as Redox Materials for Solar-Thermochemical Processes. 13th International Conference on Solid State Chemistry, 16.-21. Sep. 2018, Pardubice, Tchechien.

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Official URL: http://www.ssc-conference.com/2018/


Perovskite oxides constitute a large and well known group of materials, with many valuable applications in research and technology. These materials are excellent candidates for application as redox materials in solar-thermochemical processes. Using concentrated solar power (CSP) as heat source, these oxides are non-stoichiometrically reduced at high temperature, followed by re-oxidation at lower temperatures or higher oxygen partial pressures. By this means, air can be separated thermochemically for the application in industrial processes, or fuels may be produced through preparation of hydrogen and carbon monoxide. The targeted design of materials based on their thermodynamic properties for one of the above-mentioned applications is of particular interest. By preparing solid solutions with the general composition AxB1-xMyN1-yO3-δ with A, B = Ca, Sr and M, N = Ti, Mn, Fe, Co, Cu using a modified Pechini method, [4] we show how their redox enthalpies and entropies as a function of the non-stoichiometry δ can be tuned by adjusting their composition. We demonstrate the formation of perovskite solid solutions for a large range of compositions. Furthermore, systematic materials screening was conducted both experimentally and theoretically using the infrastructure of The Materials Project in collaboration with the Lawrence Berkeley National Laboratory. By this means, it was possible to create a search engine for perovskite materials based on their redox properties, which allows finding the most efficient perovskite depending on the individual process conditions.

Item URL in elib:https://elib.dlr.de/123215/
Document Type:Conference or Workshop Item (Speech)
Title:Synthesis and Thermodynamics of Perovskite Solid Solutions as Redox Materials for Solar-Thermochemical Processes
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Vieten, JosuaJosua.Vieten (at) dlr.deUNSPECIFIED
Roeb, MartinMartin.Roeb (at) dlr.deUNSPECIFIED
Sattler, ChristianChristian.Sattler (at) dlr.dehttps://orcid.org/0000-0002-4314-1124
Date:16 September 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Perovskite, solid solution, redox materials, solar thermochemical, fuels
Event Title:13th International Conference on Solid State Chemistry
Event Location:Pardubice, Tchechien
Event Type:international Conference
Event Dates:16.-21. Sep. 2018
Organizer:University of Pardubice
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:19 Nov 2018 13:16
Last Modified:19 Nov 2018 13:16

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