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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, 2016; 55(36):10895-10898
Publisher: Wiley
Issue Date: 2016
ISSN: 1433-7851
Statement of
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
RMID: 0030057466
DOI: 10.1002/anie.201604035
Appears in Collections:Chemistry publications

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