Titanium-substituted ferrite perovskite: An excellent sulfur and coking tolerant anode catalyst for SOFCs

• Published in: Catalysis today Vol. 330; pp. 217 - 221
• Main Authors: Cao, Zhiqun, Fan, Liangdong, Zhang, Guanghong, Shao, Kang, He, Chuanxin, Zhang, Qianling, Lv, Zhe, Zhu, Bin
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.06.2019
• Subjects: Anode; Coking tolerance; Ferrite perovskite; Solid oxide fuel cell; Sulfur tolerance; Ferrite perovskite; Coking tolerance; Anode; Solid oxide fuel cell; Sulfur tolerance
• ISSN: 0920-5861; 1873-4308
• DOI: 10.1016/j.cattod.2018.04.023

[Display omitted] •LSFT is used as anode electrocatalyst for hydrocarbon fueled SOFC.•LSFT shows good electro-activity toward CH4 direct oxidation.•LSFT keeps stable in H2 fuel with different H2S contents up to 750 ppm for 24 h.•LSFT presents a good carbon deposition tolerance. Efficient and direct utilization of hydrocarbon fuel in a solid oxide fuel cell (SOFCs) is highly desirable. However, the carbon deposition and contaminants poisoning issue should be overcome. In this work, we developed a titanium-doped (La,Sr)FeO3 ceramic oxide (LSFT) anode which integrates the advantage of high durability of titanate perovskite and super electrocatalytic activity of ferrite-based perovskite for methane-fueled SOFCs with H2S impurity. Its electrocatalytic activity and operational durability in H2 with various H2S contents and humidified CH4 fuel were systematically investigated. We found that the LSFT perovskite oxide anode showed acceptable activity and durability toward methane direct oxidation, and excellent coke and sulfur tolerance up to 750 ppm, making it a promising electrocatalyst for direct use of hydrocarbon fuels such as natural gas in high-temperature SOFCs.