SOFC耐硫阳极催化剂La0.7Sr0.3Cr1-xFexO3-δ的制备及表征

化工进展

SOFC耐硫阳极催化剂La_0.7Sr_0.3Cr_1-xFe_xO_3-δ的制备及表征

张晓花，钟秦

南京理工大学化工学院

出版日期:2009-05-05 发布日期:2009-05-05

Preparation and characterization of La_0.7Sr_0.3Cr_1-xFe_xO_3-δanode catalyst with sulfur tolerance for SOFC

ZHANG Xiaohua，ZHONG Qin

School of Chemical Engineering，Nanjing University of Science & Technology

Online:2009-05-05 Published:2009-05-05

摘要/Abstract

摘要： 采用尿素燃烧法制备了La0.7Sr0.3Cr1-xFexO3-δ（x=0.2，0.3，0.4，0.5）系列阳极材料。采用TG-DTA、XRD对所制备的材料进行表征，利用直流四探针法测定催化剂在400～850 ℃温度时在空气中的电导率，并测试了电池电化学性能。结果表明：LSCrF系列材料具有很好的热稳定性，钙钛矿相晶型结构完整，与BaCe0.475Zr0.425Y0.1O3-δ电解质之间具有较好的化学相容性。同时，XRD显示LSCrF系列材料在硫化氢气氛中具有很好的化学稳定性。LSCrF7355在850℃的电导率最大为1.18 S/cm，其单电池的开路电压值为0.76 V，最大输出功率为7.16 mW/cm2，满足固体氧化物燃料电池阳极催化剂的要求，是一种新型的耐硫阳极材料。

Abstract: La0.7Sr0.3Cr1-xFexO3-δ (x=0.2,0.3,0.4,0.5) materials were synthesized by the urea combustion method. The performance of prepared materials was characterized by using TG-DTA, XRD methods. The conductivity of catalyst was measured with the DC four probe method in air at 400～850℃, and the electro-chemical performance of the single cell was tested. The results showed that LSCrF materials with good heat-stability had perfect perovskite phase. Besides, LSCrF materials exhibited good chemical compatibility with BaCe0.475Zr0.425Y0.1O3-δ electrolyte material. Meanwhile, they maintained good chemical stability in H2S atmosphere through XRD analysis. Among LSCrF materials，the LSCrF7355 sample showed the highest conductivity of 1.18 S/cm at 850 ℃, open circuit voltage of 0.76 V, and the max power density of 7.16 mW/cm2, which satisfied the anode catalyst of solid oxide fuel cell and would be a novel sulfur tolerant anode material.

张晓花，钟秦. SOFC耐硫阳极催化剂La_0.7Sr_0.3Cr_1-xFe_xO_3-δ的制备及表征 [J]. 化工进展.

ZHANG Xiaohua，ZHONG Qin. Preparation and characterization of La_0.7Sr_0.3Cr_1-xFe_xO_3-δanode catalyst with sulfur tolerance for SOFC[J]. Chemical Industry and Engineering Progree.