Properties and performance of A-site deficient (Ba0.5Sr0.5)1-xCo0.8Fe0.2O3-δ for oxygen

被引：122

作者：

Ge, Lei ^{[1
]}

Zhou, Wei ^{[1
]}

Ran, Ran ^{[1
]}

Liu, Shaornin ^{[2
]}

Shao, Zongping ^{[1
]}

Jin, Wanqin ^{[1
]}

Xu, Nanping ^{[1
]}

机构：

[1] Nanjing Univ Technol, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Peoples R China

[2] Univ Queensland, Sch Engn, ARC Ctr Funct Nanomat, Brisbane, Qld 4072, Australia

来源：

JOURNAL OF MEMBRANE SCIENCE | 2007年 / 306卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

oxygen separation; mixed conducting; (Ba0.5Sr0.5)(1-x)Co0.8Fe0.2O3-delta; deficiency; inorganic membrane;

D O I：

10.1016/j.memsci.2007.09.004

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

(Ba0.5Sr0.5)(1-x),Co0.8Fe0.2O3-delta (BSCF) (x= 0-0.3) oxides were prepared by a combined EDTA-citrate complexing method. The crystal structure' electrical conductivity, sintering behavior and oxygen desorption property of the oxides were studied by X-ray diffraction (XRD), four-probe direct current (DC) conductivity, environmental scanning electron microscopy (ESEM) and oxygen temperature-programmed desorption (O-2-TPD) technologies, respectively. At x = 0.0-0.15, BSCF had a cubic perovskite structure, the lattice parameter and electrical conductivity both decreased steadily with increasing A-site deficiency. The A-site deficiency resulted in the increasing oxygen vacancy concentration in the lattice structure and improved the sintering of the oxides. BSCF (x = 0.03) showed the highest oxygen permeability with the flux reaching 3.5 x 10(-6) Mol cm(-2) s(-1) [STP: standard temperature and pressure] at 900 degrees C through a 1.0 mm thickness membrane. Long-term stability test of BSCF (x = 0.03) membrane at 850 degrees C indicated a slight deterioration of the permeation flux, which was attributed in part to the increased A-site deficiency of the bulk from Ba2+ and Sr2+ segregation over the membrane surface. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：318 / 328

页数：11

共 50 条

[1] Influence of CO2 on the oxygen permeation performance and the microstructure of perovskite-type (Ba0.5Sr0.5)(Co0.8Fe0.2)O3-δ membranes [J].

Arnold, Mirko ;

Wang, Haihui ;

Feldhoff, Armin .

JOURNAL OF MEMBRANE SCIENCE, 2007, 293 (1-2) :44-52

[2]

Badwal SPS, 2001, ADV MATER, V13, P993, DOI 10.1002/1521-4095(200107)13:12/13<993::AID-ADMA993>3.0.CO

[3]

2-#

[4] Ceramic membrane reactor for converting methane to syngas [J].

Balachandran, U ;

Dusek, JT ;

Maiya, PS ;

Ma, B ;

Mieville, RL ;

Kleefisch, MS ;

Udovich, CA .

CATALYSIS TODAY, 1997, 36 (03) :265-272

[5] La(1-y)Co0.4Fe0.6O3-δ perovskite oxides as catalysts for Fischer-Tropsch synthesis [J].

Bedel, L ;

Roger, AC ;

Rehspringer, JL ;

Zimmermann, Y ;

Kiennemann, A .

JOURNAL OF CATALYSIS, 2005, 235 (02) :279-294

[6]

BENAMOR A, 2007, J ALLOY COMPD

[7]

Bouwmeester H.J.M., 1996, Membrane Science and Technology, V4, P435

[8] Assessment of Ba0.5Sr0.5Co1-yFeyO3-δ (y=0.0-1.0) for prospective application as cathode for IT-SOFCs or oxygen permeating membrane [J].

Chen, Zhihao ;

Ran, Ran ;

Zhou, Wei ;

Shao, Zongping ;

Liu, Shaomin .

ELECTROCHIMICA ACTA, 2007, 52 (25) :7343-7351

[9] Oxide ion diffusion in perovskite-structured Ba1-xSrxCo1-yFeyO2.5:: A molecular dynamics study [J].

Fisher, C. A. J. ;

Yoshiya, M. ;

Iwamoto, Y. ;

Ishii, J. ;

Asanuma, M. ;

Yabuta, K. .

SOLID STATE IONICS, 2007, 177 (39-40) :3425-3431

[10] The role of dopant concentration, A-site deficiency and processing on the electrical properties of strontium- and titanium-doped lanthanum scandate [J].

Hatchwell, C ;

Bonanos, N ;

Mogensen, M .

SOLID STATE IONICS, 2004, 167 (3-4) :349-354

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