Iron incorporated Ni-ZrO₂ catalysts for electric power generation from methane

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• 作者：Huaiyu Zhu^a ; Wei Wang^a ; Ran Ran^a ; Chao Su^a ; Huangang Shi^a ; Zongping Shao^a ; ^b ; ^{shaozp@njut.edu.cn} ; ^{zongping.shao@monash.edu}
• 关键词：Solid-oxide fuel cells ; Nickel-iron catalyst ; Methane partial oxidation ; Carbon deposition
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：June, 2012
• 卷：37
• 期：12
• 页码：9801-9808
• 文件大小：1089 K

摘要

On the purpose to perform as functional layer of SOFCs operating on methane fuel, NiFe-ZrO₂ alloy catalysts have been synthesized and investigated for methane partial oxidation reactions. Ni₄Fe₁-ZrO₂ shows catalytic activity comparable to that of Ni-ZrO₂ and superior to other Fe-containing catalysts. In addition, O₂-TPO analysis indicates iron is also prone to coke formation; as a result, most of NiFe-ZrO₂ catalysts do not show improved coking resistance than Ni-ZrO₂. Anyway, Ni₄Fe₁-ZrO₂ (Ni:Fe聽=聽4:1 by weight) prepared by glycine-nitrate process shows somewhat less carbon deposition than the others. However, Raman spectroscopy demonstrates that the addition of Fe does reduce the graphitization degree of the deposited carbon, suggesting the easier elimination of carbon once it is deposited over the catalyst. Ni₄Fe₁-ZrO₂ has an excellent long-term stability for partial oxidation of methane reaction at 850聽掳C. A solid oxide fuel cell with conventional nickel cermet anode and Ni₄Fe₁-ZrO₂ functional layer is operated on CH₄-O₂ gas mixture to yield a peak power density of 1038聽mW聽cm^鈭? at 850聽掳C, which is comparable to that of hydrogen fuel. In summary, the Ni₄Fe₁-ZrO₂ catalyst is potential catalyst as functional layer for solid-oxide fuel cells operating on methane fuel.