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仪器网/ 行业应用/ 解决方案/ Direct electro-oxidation of iso-octane in a solid el

Direct electro-oxidation of iso-octane in a solid el

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研究领域:SOFC燃料电池 方法:IV特性和交流阻抗 范围:1MHz - 0.1Hz
The present work aims to explore the activity of Cu/CeO2 composites as anodic electrodes in direct iso-octane
SOFCs. When the cell was operated as a membrane reactor, the effect of temperature, Pi-C8H18 and applied
anodic overpotentials on the electrocatalytic activity and products' distribution, at both open and closed
circuit conditions, was examined. Additionally, in situ DRIFT spectroscopy was carried out in order to
correlate the performance of Cu/CeO2 with its surface chemistry during iso-octane decomposition. Under the
fuel cell mode of operation, the electrochemical performance and stability of Cu/CeO2 were investigated by
voltagecurrent densitypower density and AC impedance measurements. The results reveal that at high
anodic polarization conditions, carbon formation can be noticeably restricted (verified also by EDAX
analysis), while H2 production was enhanced due to partial oxidation, steam reforming, dehydrogenation
and water gas shift reactions. Achieved power densities were found to substantially increase both with
temperature and Pi-C8H18, while minor performance degradation was indicated in the step-change tests,
where the overall activity of CuCeO2 electrodes remained essentially unaffected.
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