Home > Publications database > Thermochemical stability of Fe- and Co-functionalized perovskite-type SrTiO3 oxygen transport membrane materials in syngas conditions > print

001     865071
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024 7 _ |a 10.1016/j.jeurceramsoc.2019.06.045
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024 7 _ |a 1878-2892
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082 _ _ |a 660
100 1 _ |a Liu, Yang
|0 P:(DE-Juel1)168104
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245 _ _ |a Thermochemical stability of Fe- and Co-functionalized perovskite-type SrTiO3 oxygen transport membrane materials in syngas conditions
260 _ _ |a Amsterdam [u.a.]
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520 _ _ |a The materials typically used for oxygen transport membranes, Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) and La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) tend to decompose due to their low thermochemical stability under reducing atmosphere. Fe- and Co-doped SrTiO3 (SrTi1-x-yCoxFeyO3-δ, x + y ≤ 0.35) (STCF) materials showing an oxygen transport comparable to LSCF have great potential for application in ion-transport-devices. In this study, the thermochemical stability of pure perovskite-structured STCF was investigated after annealing in a syngas atmosphere at 600–900 °C. The phase composition of the materials after annealing was characterized by means of X-ray diffraction (XRD). The thermodynamic activities of SrO, FeO, and CoO in the STCF materials were evaluated using Knudsen effusion mass spectrometry (KEMS). Co-doped SrTiO3 (STC) materials were not stable after annealing in the syngas atmosphere above 5 mol% Co-substitution. Ruddlesden-Popper-like phases and SrCO3 were detected after annealing at 600 °C. In contrast, Fe substitution (STF) showed good stability after annealing in syngas upto 35 mol% substitution.
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700 1 _ |a Motalov, Vladimir
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700 1 _ |a Baumann, Stefan
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700 1 _ |a Sergeev, Dmitry
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700 1 _ |a Müller, Michael
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700 1 _ |a Sohn, Yoo Jung
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700 1 _ |a Guillon, Olivier
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773 _ _ |a 10.1016/j.jeurceramsoc.2019.06.045
|g Vol. 39, no. 15, p. 4874 - 4881
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|t Journal of the European Ceramic Society
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|y 2019
|x 0955-2219
856 4 _ |y Published on 2019-06-25. Available in OpenAccess from 2021-06-25.
|u https://juser.fz-juelich.de/record/865071/files/2019%20Yang%20Thermochemical%20stability%20of%20STCF%20manuscript-oa.pdf
856 4 _ |y Published on 2019-06-25. Available in OpenAccess from 2021-06-25.
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