Processing and electrochemical performance of manganese-doped lanthanum-strontium chromite in oxidizing and reducing atmospheres
作者： Sapna Gupta , Yu Zhong , Manoj Mahapatra , Prabhakar Singh
DOI: 10.1016/J.IJHYDENE.2015.07.153
关键词: Chemical engineering 、 Manganese 、 Sintering 、 Oxygen transport 、 Metallurgy 、 Lanthanum 、 Reducing atmosphere 、 Spinel 、 Chemistry 、 Oxidizing agent 、 Partial pressure
摘要: Abstract This study reports the role of oxygen partial pressure (PO2) on microstructural changes and compound formation during exposure (La0.75Sr0.25)0.95Cr0.7Mn0.3O3 (LSCM73) to 1400 °C emulate transport membrane device fabrication. Results electrochemical testing LSCM73+8YSZ//8YSZ//LSCM73+8YSZ symmetrical cells, is also reported at 950 °C with time for 80 h in oxidizing (air) reducing atmospheres (Ar-3%H2–3%H2O). Our results from elevated temperature studies show a decrease density due absence liquid phase assisted sintering inability form SrCrO4. Formation rhombohedral structure MnCr2O4 spinel evident air whereas Mn3O4 occurs along lattice transformation cubic lower PO2. experimental are agreement LSCM73 diagram constructed using Thermo-Calc. Stable performance obtained atmosphere, non-ohmic resistance increases which attributed Sr-segregation surface interaction between LSCM/8YSZ. No delamination electrode layer observed both atmosphere.
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sci-hub.se 参考文章(57)
David John Young, High Temperature Oxidation and Corrosion of Metals ,(2008)
Shanwen Tao, John T. S. Irvine, Synthesis and Characterization of ( La0.75Sr0.25 ) Cr0.5Mn0.5 O 3 − δ , a Redox-Stable, Efficient Perovskite Anode for SOFCs Journal of The Electrochemical Society. ,vol. 151, ,(2004) , 10.1149/1.1639161
Gervase Maxwell Christie, Jamie Robyn Wilson, Bart Antonie van Hassel, Catalyst containing oxygen transport membrane ,(2010)
Erwin Povoden-Karadeniz, Thermodynamic database of the La-Sr-Mn-Cr-O oxide system and applications to solid oxide fuel cells ETH. ,(2008) , 10.3929/ETHZ-A-005781945
A.J. Burggraaf, L. Cot, Fundamentals of inorganic membrane science and technology Membrane Science and Technology. ,vol. 4, ,(1996) , 10.1016/S0927-5193(96)80001-5
DH Peck, M Miller, K Hilpert, Phase diagram study in the CaO–Cr2O3–La2O3 system in air and under low oxygen pressure Solid State Ionics. ,vol. 123, pp. 47- 57 ,(1999) , 10.1016/S0167-2738(99)00087-9
Michael van den Bossche, Roy Matthews, Arthur Lichtenberger, Steven McIntosh, Insights Into the Fuel Oxidation Mechanism of La0.75Sr0.25Cr0.5Mn0.5O3 − δ SOFC Anodes Journal of The Electrochemical Society. ,vol. 157, ,(2010) , 10.1149/1.3288374
Harold Bernstein, Larry Kaufman, Computer calculation of phase diagrams with special reference to refractory metals ,(1970)
Jian-jun Liu, Tong Liu, Wen-dong Wang, Jian-feng Gao, Chu-sheng Chen, Zr0.84Y0.16O1.92–La0.8Sr0.2Cr0.5Fe0.5O3−δ dual-phase composite hollow fiber membrane targeting chemical reactor applications Journal of Membrane Science. ,vol. 389, pp. 435- 440 ,(2012) , 10.1016/J.MEMSCI.2011.11.010
Y.J. Leng, S.H. Chan, K.A. Khor, S.P. Jiang, Development of LSM/YSZ composite cathode for anode-supported solid oxide fuel cells Journal of Applied Electrochemistry. ,vol. 34, pp. 409- 415 ,(2004) , 10.1023/B:JACH.0000016627.29374.24