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NiMo-ceria-zirconia catalytic reforming layer for solid oxide fuel cells running on a gasoline surrogate
Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2017-10-31 , DOI: 10.1016/j.apcatb.2017.10.067
Kai Zhao , Xiaoxue Hou , Qusay Bkour , M. Grant Norton , Su Ha

This paper describes an application of a NiMo-ceria-zirconia (NiMo-CZ) catalyst as a micro-reforming layer for solid oxide fuel cells running on isooctane (i.e., a gasoline surrogate). The catalyst layer was applied on top of a conventional anode supported single cell with a configuration of Ni-yttria-stabilized zirconia (YSZ) anode, YSZ/Ce0.8Sm0.2O1.9 bi-layer electrolyte and La0.6Sr0.4Co0.2Fe0.8O3-δ cathode. Our findings show that the application of the novel catalyst layer was an effective way to reform the mixture of isooctane and air into H2 and CO, which facilitated the electrochemical oxidation of complex hydrocarbons at the anode. At 750 °C, the single cell with the micro-reforming layer exhibited a low polarization resistance of 1.36 Ω cm2 and a maximum power density of 405 mW cm−2 in the direct feeding condition of an isooctane/air mixture. At the current density of 500 mA cm−2, the cell voltage presented a fairly low degradation rate of 3.0 mV h−1 during a 12 h stability test. The excellent electrochemical performance suggests the high catalytic activity of the NiMo-CZ catalyst layer for reforming isooctane and suppressing degradation of the single cell in the direct feeding of isooctane/air.



中文翻译:

用于在汽油替代品上运行的固体氧化物燃料电池的NiMo-二氧化铈-氧化锆催化重整层

本文介绍了将NiMo-二氧化铈-氧化锆(NiMo-CZ)催化剂用作在异辛烷(即汽油替代品)上运行的固体氧化物燃料电池的微重整层的应用。将催化剂层施加在具有镍-钇稳定的氧化锆(YSZ)阳极,YSZ / Ce 0.8 Sm 0.2 O 1.9双层电解质和La 0.6 Sr 0.4 Co 0.2 Fe 0.8的常规阳极支撑单电池的顶部O3 阴极。我们的发现表明,新型催化剂层的应用是将异辛烷和空气的混合物重整为H 2的有效方法和一氧化碳,可促进阳极处复杂碳氢化合物的电化学氧化。在750℃下,与微重整层的单电池显示出1.36Ωcm的低极化电阻2和405毫瓦厘米的最大功率密度-2在异辛烷/空气混合物的直接馈电条件。在500 mA cm -2的电流密度下,电池电压在12 h的稳定性测试中表现出相当低的3.0 mV h -1的降解速率。优异的电化学性能表明,NiMo-CZ催化剂层具有高催化活性,可以重整异辛烷并抑制异辛烷/空气直接进料中单电池的降解。

更新日期:2017-10-31
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