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用等体积浸渍 -还原法制备了负载型的NiB/TiO2 (B/Ni=5∶1摩尔比 )非晶态合金 ,并在相同条件下制备了NiB/Al2 O3 (B/Ni=5∶1摩尔比 )与之对照。用XRD、SEM和TEM等表征方法比较了样品的非晶性质。在脉冲微反 -色谱装置上以噻吩的HDS反应为探针测定了NiB/TiO2 、NiB/Al2 O3 的反应活性 ,进行了动力学研究。结果证明 ,NiB/TiO2 的低温活性远高于NiB/Al2 O3 ,其原因是它的活化能远远小于后者。
The NiB / Al 2 O 3 (B / Ni = 5: 1 molar ratio) amorphous alloy was prepared by the same volume impregnation-reduction method under the same conditions. Compared with the molar ratio). The amorphous properties of the samples were compared by XRD, SEM and TEM. The reaction kinetics of NiB / TiO2 and NiB / Al2 O3 was investigated by using HDS reaction of thiophene as a probe on a pulse micro-reversed-phase device. The kinetics was studied. The results show that, NiB / TiO2 low temperature activity is much higher than NiB / Al2 O3, the reason is that its activation energy is much smaller than the latter.