Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 8, Issue 5, Pages 833-838Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2006.03.018
Keywords
solid oxide fuel cells; CeO2; mesoporous; hydrocarbons; reforming catalyst layer
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Two types of ceria (CeO2) materials: mesoporous powders and mesoporous flowerlike microspheres have been synthesized. The products were characterized by XRD, SEM, TEM and N-2 sorption measurements. Solid oxide fuel cells (SOFCs) with a reforming catalyst layer applied on the anode side were fabricated and operated with iso-octane/air/H2O/CO2 fuel mixtures. The fuel cells with a porous catalyst layer yield much higher maximum power density than those without a catalyst layer. In particular., the performance of the fuel cell with a flowerlike mesoporous CeO2-Ru microsphere catalyst layer is obviously improved, producing maximum power density up to 0.654 W cm(-2) at 600 degrees C. Electrochemical impedance spectroscopy (EIS) analysis showed the kinetic characteristic of anode reactions in the fuel cell with porous CeO2-Ru microsphere catalyst layers was significantly enhanced. (c) 2006 Elsevier B.V. All rights reserved.
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