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用化学还原法制备了NI-CO-B非晶态合金催化剂,并采用透射电子显微镜、扫描电子显微镜、选区电子衍射、X射线衍射、X射线能谱和差热-热重分析等表征手段研究了催化剂的非晶性质和原子组成等.将此催化剂用于邻氯硝基苯和3,4-二氯硝基苯的液相催化加氢反应,结果表明,当CO/(CO+NI)=0.5(摩尔比)时,NI-CO-B催化剂具有较好的加氢性能和较高的抑制脱卤性能.在不加脱卤抑制剂的情况下,两种氯代硝基苯的转化率均接近100%,脱卤率分别为1.12%和0.42%,优于使用NI-B和CO-B非晶态合金催化剂时的结果.还讨论了将CO引入到NI-B非晶态合金催化剂时对其性能的影响.
NI-CO-B amorphous alloy catalysts were prepared by chemical reduction method and characterized by transmission electron microscopy, scanning electron microscopy, selected area electron diffraction, X-ray diffraction, X-ray energy dispersive spectroscopy and differential thermal-thermogravimetric analysis The amorphous nature of the catalyst and the atomic composition etc .. This catalyst was used for the liquid-phase catalytic hydrogenation of o-chloronitrobenzene and 3,4-dichloronitrobenzene, the results show that when CO / (CO + NI) = 0.5 (molar ratio), NI-CO-B catalyst has better hydrogenation performance and higher inhibition of dehalogenation performance.In the absence of dehalogenation inhibitor, the conversion of two chloronitrobenzene Rate were close to 100%, the dehalogenation rate was 1.12% and 0.42% respectively, which was better than that of NI-B and CO-B amorphous alloy catalysts.It was also discussed that the introduction of CO into NI-B amorphous alloy Catalyst on its performance.