Investigations of mesoporous CeO₂–Ru as a reforming catalyst layer for solid oxide fuel cells

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• 作者：Chunwen Sun ; Zhen Xie ; Changrong Xia ; Hong Li and Liquan Chen
• 关键词：Solid oxide fuel cells ; CeO₂ ; Mesoporous ; Hydrocarbons ; Reforming catalyst layer
• 刊名：Electrochemistry Communications
• 出版年：2006
• 出版时间：May 2006
• 年：2006
• 卷：8
• 期：5
• 页码：833-838
• 全文大小：399 K

文摘

Two types of ceria (CeO₂) materials: mesoporous powders and mesoporous flowerlike microspheres have been synthesized. The products were characterized by XRD, SEM, TEM and N₂ 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 °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.