This title appears in the Scientific Report :
2022
Please use the identifier:
http://dx.doi.org/10.1016/j.actamat.2022.118034 in citations.
Please use the identifier: http://hdl.handle.net/2128/31227 in citations.
The in situ generated emerging phase inside dual phase oxygen transport membranes
The in situ generated emerging phase inside dual phase oxygen transport membranes
The in situ generated emerging phase inside the dual-phase oxygen transport membranes (DP-OTMs) plays a crucial role in boosting the overall performance of DP-OTMs. However, its detailed structure and properties are still not fully understood. Utilizing advanced transmission electron microscopy (TEM...
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Personal Name(s): | Ran, Ke (Corresponding author) |
---|---|
Zeng, Fanlin / Fischer, Liudmila / Baumann, Stefan / Meulenberg, Wilhelm Albert / Neuhaus, Kerstin / Mayer, Joachim | |
Contributing Institute: |
Helmholtz-Institut Münster Ionenleiter für Energiespeicher; IEK-12 Werkstoffsynthese und Herstellungsverfahren; IEK-1 Materialwissenschaft u. Werkstofftechnik; ER-C-2 |
Published in: | Acta materialia, 234 (2022) S. 118034 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2022
|
DOI: |
10.1016/j.actamat.2022.118034 |
Document Type: |
Journal Article |
Research Program: |
Die Rolle von Grenzflächen in mehrphasigen Ceroxid-basierten Membranen für den Einsatz in Membranreaktoren Understanding the Structural and Functional Behavior of Solid State Systems |
Link: |
Published on 2022-05-19. Available in OpenAccess from 2024-05-19. |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/31227 in citations.
The in situ generated emerging phase inside the dual-phase oxygen transport membranes (DP-OTMs) plays a crucial role in boosting the overall performance of DP-OTMs. However, its detailed structure and properties are still not fully understood. Utilizing advanced transmission electron microscopy (TEM) techniques, the emerging phase GdxCe1-xFeyCo1-yO3-δ (GCFCO) inside the CexGd1-xO2-δ-FeCo2O4 (CGO-FC2O) OTMs was successfully characterized at the atomic scale. The newly formed GCFCO is primarily surrounded by the CGO, and contributes to a significant reduction of non-solute segregation at the CGO grain boundaries. Electronic characteristics of the GCFCO shows a sensitive dependence on its chemical composition, including the valence state of Ce and Fe as well as the oxygen vacancies. Additional CGO-GCFCO interfaces were introduced, where almost intact crystal structures were observed with slight Gd and Co segregation ∼1 nm at the edges. Approaching the interface, on the CGO side, only a minimum drop of the Ce valence was determined. On the GCFCO side, mixed Ce3+ and Ce4+ are partially occupying the Gd sites, while Fe and Co valence stay constant until the edge. Our study provides novel insight into the phase information within CGO-FC2O composites, which paves the path towards superior performance of various DP-OTMs |