Nickel–iron alloy catalysts for reforming of hydrocarbons: preparation, structure, and catalytic properties
Nickel–iron alloy catalysts for reforming of hydrocarbons: preparation, structure, and catalytic properties
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DOI：
10.1039/c7cy01300k
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发表时间：
2017-09
影响因子：
5
通讯作者：
K. Tomishige;Dalin Li;M. Tamura;Y. Nakagawa
中科院分区：
文献类型：
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作者：
K. Tomishige;Dalin Li;M. Tamura;Y. Nakagawa
综述了近年来负载型Ni-Fe合金催化剂在甲烷干重整和大于甲烷分子的水蒸气重整等各种重整反应中的研究进展。Ni-Fe合金的制备方法对催化性能有很大的影响，因为Ni-Fe合金的组成控制是关键。简单的共浸渍不能有效地获得均匀的Ni-Fe合金颗粒。在含铁复合氧化物载体上浸渍Ni可通过还原得到Ni-Fe合金颗粒，但Fe/Ni比的控制比较困难。另一方面，利用含有Ni和Fe离子两者的氧化物前体，例如类水滑石化合物和钙钛矿，在获得具有受控组成的Ni-Fe合金颗粒方面是有效的。优化后的Ni-Fe合金催化剂在各种重整反应中表现出良好的活性和抗积炭性能。此外，由含有Ni和Fe离子的氧化物前体制备的催化剂可以通过在氧化还原处理期间的再分散而显示出良好的再生能力。
Recent developments on supported Ni–Fe alloy catalysts are reviewed for various reforming reactions such as dry reforming of methane and steam reforming of molecules larger than methane. The catalytic performance greatly depends on the preparation methods, because the control of the composition of the Ni–Fe alloy is critical. Simple co-impregnation is not effective in obtaining uniform Ni–Fe alloy particles. Impregnation of Ni on Fe-containing mixed oxide supports can give Ni–Fe alloy particles by reduction; however, the control of the Fe/Ni ratio is rather difficult. On the other hand, utilization of oxide precursors containing both Ni and Fe ions such as hydrotalcite-like compounds and perovskite is effective in obtaining Ni–Fe alloy particles with controlled composition. The optimized Ni–Fe alloy catalysts show good performance in various reforming reactions in view of activity and resistance to carbon deposition. In addition, catalysts prepared from oxide precursors containing both Ni and Fe ions can show good regeneration ability by re-dispersion during the oxidation–reduction treatment.