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000907873 1001_ $$0P:(DE-Juel1)174238$$aRan, Ke$$b0$$eCorresponding author$$ufzj
000907873 245__ $$aThe in situ generated emerging phase inside dual phase oxygen transport membranes
000907873 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2022
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000907873 520__ $$aThe 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
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000907873 536__ $$0G:(GEPRIS)387282673$$aDFG project 387282673 - Die Rolle von Grenzflächen in mehrphasigen Ceroxid-basierten Membranen für den Einsatz in Membranreaktoren $$c387282673$$x1
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000907873 7001_ $$0P:(DE-Juel1)173865$$aZeng, Fanlin$$b1$$ufzj
000907873 7001_ $$0P:(DE-Juel1)174435$$aFischer, Liudmila$$b2$$ufzj
000907873 7001_ $$0P:(DE-Juel1)129587$$aBaumann, Stefan$$b3$$ufzj
000907873 7001_ $$0P:(DE-Juel1)129637$$aMeulenberg, Wilhelm Albert$$b4$$ufzj
000907873 7001_ $$0P:(DE-Juel1)181017$$aNeuhaus, Kerstin$$b5$$ufzj
000907873 7001_ $$0P:(DE-Juel1)130824$$aMayer, Joachim$$b6$$ufzj
000907873 773__ $$0PERI:(DE-600)2014621-8$$a10.1016/j.actamat.2022.118034$$gVol. 234, p. 118034 -$$p118034$$tActa materialia$$v234$$x1359-6454$$y2022
000907873 8564_ $$uhttps://juser.fz-juelich.de/record/907873/files/emerging%2Bphase%2Binside%2BOTM.pdf$$yPublished on 2022-05-19. Available in OpenAccess from 2024-05-19.
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