Catalytic decomposition of methane on impregnated nickel based anodes with molecular-beam mass spectrometry and tunable synchrotron vacuum ultraviolet photoionization

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• 作者：Beibei Liu^a ; Zhangbo Liu^a ; ^c ; Shuang Wang^a ; Changrong Xia^a ; ^{xiacr@ustc.edu.cn} ; Mingfeng Xie^b ; Zhanjun Cheng^b ; Yuyang Li^b
• 关键词：Catalytic decomposition ; Methane ; Solid oxide fuel cell ; Synchrotron vacuum ultraviolet photoionization mass spectrometry
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：May, 2012
• 卷：37
• 期：10
• 页码：8354-8359
• 文件大小：729 K

摘要

The molecular-beam spectrometric technique coupled with tunable synchrotron vacuum ultraviolet photoionization is applied to reveal the catalytic decomposition of methane over Ni-based composites with and without impregnated nano-sized samaria-doped ceria (SDC) particles. It is shown that the coating of SDC nanoparticles not only decreases the decomposition temperature, but also increases the conversion ratio, thus indicating that those impregnated SDC nanoparticles are highly catalytically active for methane decomposition. In addition, C₂H₄ is observed when the impregnated Ni-SDC composites are used as the catalyst, suggesting that SDC coating also suppresses carbon deposition at the anodes of solid oxide fuel cells.