Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 336, Issue 1-2, Pages 1-6Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2009.03.042
Keywords
BaCeO3; Chemical stability; Proton conductor; Sinterability; Supported membrane
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Funding
- Key Program of Chinese Academy of Sciences [KJCX1.YW07]
- National High-tech R&D Program of China [2007AA05Z157]
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Proton-conducting BaCeO3 membranes with different In-doping levels (from 10 to 30%) were fabricated on NiO-based anode substrates. Indium, which was only used as a trivalent element to create oxygen vacancies in BaCeO3 previously, was found to have the function of stabilizing BaCeO3 in this study. The In-doped BaCeO3 showed improved chemical stability against CO2, while even the traditional BaCeO3 substituting with a small amount of Zr decomposed in the same environment. Furthermore, unlike other strategies for stabilizing BaCeO3, the supported In-doped BaCeO3 membrane became dense after firing at relatively low temperatures. We also investigated the influences of the sintering temperatures and the In-doping levels on the densification and the electrical properties of the supported BaCeO3 membranes, which revealed that the In-doping strategy increased both the chemical stability and sinterability for BaCeO3 with little loss of electrical performance. (C) 2009 Elsevier B.V. All rights reserved.
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