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本文用连续微型反应器、X 射线光电子能谱(XPS)、程序升温还原(TPR)、X 射线衍射(XRD)等方法,研究了骤冷法制备的 Ni-Fe-P 非晶态催化剂的加氢活性和表面结构.结果表明:非晶态 Ni-Fe-P 合金在常压下对 CO 的加氢活性优于晶态 Ni-Fe-P 合金;表面的不同预处理对反应活性影响很大.XPS 的结果显示在较高温度下氧化时表面富铁,表面存在的镍物种和元素态铁是 CO 催化加氢的活性中心.
In this paper, the continuous micro-reactor, X-ray photoelectron spectroscopy (XPS), temperature programmed reduction (TPR), X-ray diffraction (XRD) and other methods to study the rapid cooling of Ni-Fe-P amorphous catalyst Hydrogen activity and surface structure of amorphous Ni-Fe-P alloy.The results show that the hydrogenation activity of amorphous Ni-Fe-P alloy is better than that of crystalline Ni-Fe-P alloy under atmospheric pressure; different surface pretreatments have a great effect on the reactivity The results of XPS showed that the iron-rich surface and the surface-existing nickel species and elemental iron were the active centers of CO catalytic hydrogenation at the higher temperature.