煅烧和/或加入三价金属离子对氧化镍催化剂理化性质的影响

M.I. Zaki, S.A.A. Mansour, R.B. Fahim
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引用次数: 6

摘要

采用多种物理化学技术研究了煅烧和/或在NiO催化剂中加入Cr、Al或Fe离子对表面过量氧以及结构和织构性能的影响。结果表明,只有当掺杂水平小于3 at时,才能得到均匀的固溶体。% M3 +。在300 ~ 400°C的水热分解过程中形成的NiOOH与最大表面过量氧含量有关。通过红外光谱和x射线光电子能谱鉴定了过量氧的种类。
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Effect of calcination and/or incorporation of trivalent metal ions on the physicochemical properties of nickel oxide catalyst

The effect of the calcination and/or the incorporation of Cr, Al or Fe ions in NiO catalysts on the excess oxygen on the surface and the structural and textural properties was investigated using a number of physico-chemical techniques. The results indicated that homogeneous solid solutions were obtained only when the doping level was less than 3 at.% M3+. NiOOH species formed topochemically during the hydrothermal decomposition of the parent Ni(OH)2 at 300 – 400 °C were found to be associated with the maximum surface content of excess oxygen. The excess oxygen species were identified from IR and X-ray photoelectron spectra.

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