Novel Cobalt-Free Oxygen-Permeable Perovskite-Type Membrane

IF 7 2区 材料科学 Q2 CHEMISTRY, PHYSICAL
Konstantin Efimov*, Torben Halfer, Alexander Kuhn, Paul Heitjans, Jürgen Caro, Armin Feldhoff
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引用次数: 81

Abstract

Cobalt-free perovskite with the novel composition (Ba0.5Sr0.5)(Fe0.8Cu0.2)O3-δ (BSFCu) was synthesized via a sol?gel method and studied with respect to the crystallographic structure as well as the oxygen ionic and the electronic conductivity. In situ X-ray diffraction (XRD) was applied to investigate the thermal dilatation and the phase stability of the BSFCu at high and intermediate temperatures. Additionally, time-dependent oxygen permeation performance measurements were carried out for BSFCu and Co-based (Ba0.5Sr0.5)(Co0.8Fe0.2)O3-δ membranes at 1023 K for 200 h. The BSFCu phase was found to be a cubic perovskite by XRD and transmission electron microscopy. The BSFCu membrane exhibits a very high oxygen permeation and electrical conductivity as compared to known perovskite membranes. The oxygen permeation of the BSFCu membrane maintains its value for 200 h at 1023 K unlike (Ba0.5Sr0.5)(Co0.8Fe0.2)O3-δ, whose oxygen flux was reduced by one-half during the same interval.

Abstract Image

新型无钴透氧钙钛矿型膜
采用溶胶法合成了具有新组分(Ba0.5Sr0.5)(Fe0.8Cu0.2)O3-δ (BSFCu)的无钴钙钛矿。并用凝胶法对其晶体结构以及氧离子和电导率进行了研究。采用原位x射线衍射(XRD)研究了BSFCu在高温和中高温下的热膨胀和相稳定性。此外,对BSFCu和co基(Ba0.5Sr0.5)(Co0.8Fe0.2)O3-δ膜在1023 K下保温200 h时的氧渗透性能进行了测试。通过XRD和透射电镜分析,BSFCu相为立方钙钛矿。与已知的钙钛矿膜相比,BSFCu膜具有非常高的透氧性和导电性。与(Ba0.5Sr0.5)(Co0.8Fe0.2)O3-δ不同,BSFCu膜在1023 K下的氧透性在200 h内保持不变,而O3-δ的氧通量在同一时间内减少了一半。
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来源期刊
Chemistry of Materials
Chemistry of Materials 工程技术-材料科学:综合
CiteScore
14.10
自引率
5.80%
发文量
929
审稿时长
1.5 months
期刊介绍: The journal Chemistry of Materials focuses on publishing original research at the intersection of materials science and chemistry. The studies published in the journal involve chemistry as a prominent component and explore topics such as the design, synthesis, characterization, processing, understanding, and application of functional or potentially functional materials. The journal covers various areas of interest, including inorganic and organic solid-state chemistry, nanomaterials, biomaterials, thin films and polymers, and composite/hybrid materials. The journal particularly seeks papers that highlight the creation or development of innovative materials with novel optical, electrical, magnetic, catalytic, or mechanical properties. It is essential that manuscripts on these topics have a primary focus on the chemistry of materials and represent a significant advancement compared to prior research. Before external reviews are sought, submitted manuscripts undergo a review process by a minimum of two editors to ensure their appropriateness for the journal and the presence of sufficient evidence of a significant advance that will be of broad interest to the materials chemistry community.
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