Lee, Kangjae und Knoblauch, Nicole und Agrafiotis, Christos und Pein, Mathias und Roeb, Martin und Schmücker, Martin und Sattler, Christian (2023) Strategic co-doping of ceria for improved oxidation kinetics in solar thermochemical fuel production. Materials Today Energy, 35, Seiten 1-11. Elsevier. doi: 10.1016/j.mtener.2023.101321. ISSN 2468-6069.
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Offizielle URL: https://www.sciencedirect.com/science/article/pii/S2468606923000771
Kurzfassung
La and Yb were incorporated as co-doping elements into Zr-doped ceria to investigate the influence of doping ions by means of ionic radius and valence on the ceria crystal lattice and potentially on thermodynamic and kinetic properties relevant to solar-driven two-step thermochemical CO2 splitting. Both ZreLa and ZreYb co-doped ceria clearly exhibited better reduction capability than ceria and partial molar enthalpy and entropy that were in between those of Zr-doped ceria and undoped ceria. In the case of CO2 splitting kinetics, Zr-doped ceria was the slowest in accordance with relevant literature, but Ladoped samples were much faster than Yb-doped counterparts suggesting that extrinsic oxygen vacancy formation, even though important, does not primarily determine the CO2 splitting kinetics unlike the hypothesis postulated by previous works. This work elucidates the role of dopant's ionic radius, lattice constant and valence on thermodynamics and CO2 splitting kinetics via experimental demonstration, and provides a new doping strategy not based on the extrinsic oxygen vacancy formation but based on the dopant ionic radius and valence with an insight for the further doped ceria-based redox material discovery.
elib-URL des Eintrags: | https://elib.dlr.de/195383/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||
Zusätzliche Informationen: | Deutsche Forschungsgemeinschaft (Grant No. SCHM 1367/5-1) | ||||||||||||||||||||||||||||||||
Titel: | Strategic co-doping of ceria for improved oxidation kinetics in solar thermochemical fuel production | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 28 April 2023 | ||||||||||||||||||||||||||||||||
Erschienen in: | Materials Today Energy | ||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||
Band: | 35 | ||||||||||||||||||||||||||||||||
DOI: | 10.1016/j.mtener.2023.101321 | ||||||||||||||||||||||||||||||||
Seitenbereich: | Seiten 1-11 | ||||||||||||||||||||||||||||||||
Verlag: | Elsevier | ||||||||||||||||||||||||||||||||
ISSN: | 2468-6069 | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | Doped ceria Thermochemical cycles CO2 splitting Syngas production Redox | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Energie | ||||||||||||||||||||||||||||||||
HGF - Programm: | Materialien und Technologien für die Energiewende | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | Chemische Energieträger | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | E SW - Solar- und Windenergie | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | E - Solare Brennstoffe | ||||||||||||||||||||||||||||||||
Standort: | Köln-Porz | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Future Fuels Institut für Werkstoff-Forschung | ||||||||||||||||||||||||||||||||
Hinterlegt von: | Clintgens, Stefanie | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 05 Jun 2023 10:38 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 13 Jun 2023 13:07 |
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