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作为用于氧还原反应的无钴钙钛矿型阴极材料的LaFeCuO和BaFeCuO的结构与性能

Structures and Properties of LaFeCuO and BaFeCuO as Cobalt-Free Perovskite-Type Cathode Materials for the Oxygen Reduction Reaction.

作者信息

Idrees Asim, Jiang Xuening, Liu Gang, Luo Hao, Jia Guoqiang, Zhang Qingyu, Jiang Lei, Li Xiangnan, Xu Baomin

机构信息

Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education) School of Physics Dalian University of Technology No. 2 Linggong Road Ganjingzi District Dalian 116024 P. R. China.

Dalian Institute of Chemical and Physics, CAS 457 Zhongshan Road Dalian 116023 P. R. China.

出版信息

ChemistryOpen. 2018 Sep 3;7(9):688-695. doi: 10.1002/open.201800097. eCollection 2018 Sep.

DOI:10.1002/open.201800097
PMID:30191093
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6121126/
Abstract

Perovskite oxides with mixed electronic-ionic conduction are important catalysts for the oxygen reduction reaction in solid oxide fuel cells (SOFCs). Here, two cobalt-free perovskite oxides, LaFeCuO (LFCuO) and BaFeCuO (BFCuO), were synthesized and comparatively studied with respect to their phase structures, oxygen contents, chemical defects, thermal expansion coefficient (TEC), as well as electrical and electrochemical properties. Different structures and properties have been found for each oxide, which have been interpreted based on their tolerance factors and chemical defects. LFCuO showed much better overall performance than BFCuO, and it proved to be a promising cobalt-free cathode material of intermediate-temperature SOFCs with a low TEC (12.0×10 °C) that matches well with TECs of the electrolytes, high catalytic activity for the oxygen reduction reaction characterized by low area specific resistances (0.090 Ω cm at 800 °C and 0.20 Ω cm at 750 °C), and high-temperature chemical stability with electrolytes.

摘要

具有混合电子-离子传导性的钙钛矿氧化物是固体氧化物燃料电池（SOFC）中氧还原反应的重要催化剂。在此，合成了两种无钴钙钛矿氧化物LaFeCuO（LFCuO）和BaFeCuO（BFCuO），并对它们的相结构、氧含量、化学缺陷、热膨胀系数（TEC）以及电学和电化学性质进行了比较研究。每种氧化物都发现了不同的结构和性质，并基于它们的容忍因子和化学缺陷进行了解释。LFCuO的整体性能比BFCuO好得多，事实证明它是一种有前景的中温SOFC无钴阴极材料，其热膨胀系数低（12.0×10⁻⁶/°C），与电解质的热膨胀系数匹配良好，对氧还原反应具有高催化活性，其特征在于低面积比电阻（800°C时为0.090Ω·cm，750°C时为0.20Ω·cm），并且与电解质具有高温化学稳定性。

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CO Reduction on the Pre-reduced Mixed Ionic-Electronic Conducting Perovskites La Sr FeO and SrTi Fe O.预还原混合离子电子导电钙钛矿LaSrFeO和SrTiFeO上的CO还原
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