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https://hdl.handle.net/2440/103131
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Type: | Journal article |
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 |
Author: | Cheng, S. Wang, Y. Zhuang, L. Xue, J. Wei, Y. Feldhoff, A. Caro, J. Wang, H. |
Citation: | Angewandte Chemie International Edition, 2016; 55(36):10895-10898 |
Publisher: | Wiley |
Issue Date: | 2016 |
ISSN: | 1433-7851 1521-3773 |
Statement of Responsibility: | 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 |
DOI: | 10.1002/anie.201604035 |
Published version: | http://dx.doi.org/10.1002/anie.201604035 |
Appears in Collections: | Aurora harvest 7 Chemistry publications |
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