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|Title:||A dual-phase ceramic membrane with extremely high H₂ permeation flux prepared by autoseparation of a ceramic precursor|
|Other Titles:||A dual-phase ceramic membrane with extremely high H(2) permeation flux prepared by autoseparation of a ceramic precursor|
|Citation:||Angewandte Chemie, 2016; 55(36):10895-10898|
|Shunfan Cheng, Yanjie Wang, Libin Zhuang, Jian Xue, Yanying Wei, Armin Feldhoff, Jîrgen Caro and Haihui Wang|
|Abstract:||A novel concept for the preparation of multiphase composite ceramics based on demixing of a single ceramic precursor has been developed and used for the synthesis of a dual-phase H2 -permeable ceramic membrane. The precursor BaCe0.5 Fe0.5 O3-δ decomposes on calcination at 1370 °C for 10 h into two thermodynamically stable oxides with perovskite structures: the cerium-rich oxide BaCe0.85 Fe0.15 O3-δ (BCF8515) and the iron-rich oxide BaCe0.15 Fe0.85 O3-δ (BCF1585), 50 mol % each. In the resulting dual-phase material, the orthorhombic perovskite BCF8515 acts as the main proton conductor and the cubic perovskite BCF1585 as the main electron conductor. The dual-phase membrane shows an extremely high H2 permeation flux of 0.76 mL min(-1) cm(-2) at 950 °C with 1.0 mm thickness. This auto-demixing concept should be applicable to the synthesis of other ionic-electronic conducting ceramics.|
|Keywords:||ceramic membranes; dual-phase composites; electron conductors; hydrogen permeation; proton conductors|
|Rights:||© 2016 Wiley-VCH Verlag GmbH &Co. KGaA, Weinheim|
|Appears in Collections:||Chemistry publications|
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