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@ARTICLE{Ran:907873,
      author       = {Ran, Ke and Zeng, Fanlin and Fischer, Liudmila and Baumann,
                      Stefan and Meulenberg, Wilhelm Albert and Neuhaus, Kerstin
                      and Mayer, Joachim},
      title        = {{T}he in situ generated emerging phase inside dual phase
                      oxygen transport membranes},
      journal      = {Acta materialia},
      volume       = {234},
      issn         = {1359-6454},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2022-02262},
      pages        = {118034},
      year         = {2022},
      abstract     = {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},
      cin          = {ER-C-2 / IEK-1 / IEK-12},
      ddc          = {670},
      cid          = {I:(DE-Juel1)ER-C-2-20170209 / I:(DE-Juel1)IEK-1-20101013 /
                      I:(DE-Juel1)IEK-12-20141217},
      pnm          = {5353 - Understanding the Structural and Functional Behavior
                      of Solid State Systems (POF4-535) / DFG project 387282673 -
                      Die Rolle von Grenzflächen in mehrphasigen
                      Ceroxid-basierten Membranen für den Einsatz in
                      Membranreaktoren},
      pid          = {G:(DE-HGF)POF4-5353 / G:(GEPRIS)387282673},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000805863600001},
      doi          = {10.1016/j.actamat.2022.118034},
      url          = {https://juser.fz-juelich.de/record/907873},
}