Carbon Deposition and Sulfur Tolerant La sub(0.4)Sr sub(0.5)Ba sub(0.1)TiO sub(3)-La sub(0.4)Ce sub(0.6)O sub(1.8) Anode Catalysts for Solid Oxide Fuel Cells

• Published in: Electrochimica acta Vol. 151; pp. 81 - 88
• Main Authors: Sun, Yi-Fei, Li, Jian-Hui, Cui, Shao-Hua, Chuang, Karl T, Luo, Jing-Li
• Format: Journal Article
• Language: English
• Published: 01.01.2015
• Subjects: Activation; Anodes; Carbon; Catalysis; Catalysts; Deposition; Methane; X-ray photoelectron spectroscopy; X-rays
• ISSN: 0013-4686
• DOI: 10.1016/j.electacta.2014.11.076

In this work, LSBT-LDC (La sub(0.4)Sr sub(0.5)Ba sub(0.1)TiO sub(3)-La sub(0.4)Ce sub(0.6)O sub(1.8)) was successfully prepared by impregnating LSBT and LDC solutions on porous YSZ matrix. The prepared anode material exhibited higher catalytic performance and better resistance against carbon deposition than LSBT anode material in 5000 ppm H sub(2)S containing methane. Electrochemical impedance spectra (EIS) characterizations revealed that the addition of LDC significantly reduces the activation polarization resistance. Energy-dispersive X-ray spectroscopy (EDX) results indicated that the distribution of impregnated oxides in the matrix was uniform. The results of X-ray photoelectron spectroscopy (XPS) and temperature-programed oxidation (TPO) indicated that LSBT-LDC anode could enhance the tolerance against carbon deposition. The gas chromatography (GC) analysis proved that the modification of LDC could effectively promote the activation of methane and contribute to remove carbon deposition formed on the catalyst simultaneously.