Investigation of catalytic layers on anode for solid oxide fuel cells operating with synthetic biogas

• Published in: Solid state ionics Vol. 271; pp. 109 - 115
• Main Authors: Szymczewska, D., Karczewski, J., Bochentyn, B., Chrzan, A., Gazda, M., Jasiński, P.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2015
• Subjects: Anodes; Biogas; Carbon; Carbon nanofibers; Catalysis; Catalyst; Catalysts; Deposition; Fuel cells; Internal reforming; Solid oxide fuel cell; Solid oxide fuel cells; Internal reforming; Carbon nanofibers; Biogas; Solid oxide fuel cell; Catalyst
• ISSN: 0167-2738; 1872-7689
• DOI: 10.1016/j.ssi.2014.10.023

In this paper solid oxide fuel cells operating with dry synthetic biogas have been examined. In order to increase their stability the layers of CuO-CeO2, Cu1.3Mn1.7O4 and Y0.08Sr0.92Ti0.8Fe0.2O3-δ have been deposited on the Ni-YSZ anode site. These layers should catalyze the internal biogas reforming and prevent the carbon deposition on the anode site. It has been found that CuO-CeO2 and Cu1.3Mn1.7O4 catalysts led to an increase of the stability (at least 7days) of the fabricated fuel cells powered by biogas, whereas the unmodified fuel cell, as well as the fuel cell with Y0.08Sr0.92Ti0.8Fe0.2O3-δ catalyst degraded gradually with time. A significant amount of carbon nanofibers has been formed on the catalyst surface after fuel cell test. However, they have not formed in the anode area. The use of CuO-CeO2 and Cu1.3Mn1.7O4 catalysts prevented the carbon deposition on the anode site, and thus the fuel cell degradation was slower when operating with biogas fuel. •Application of CuO-CeO2 or Cu1.3Mn1.7O4 leads to SOFC long term stability in biogas.•Carbon is formed in CuO-CeO2 and Cu1.3Mn1.7O4 in biogas, but not in Ni-YSZ anode.•Use of Y0.08Sr0.92Ti0.8Fe0.2O3-δ prevents carbon deposition in catalytic layer.