NiB、NiB/MgO非晶态合金催化剂的制备、表征及其加氢性能

以KBH4为还原剂、NiSO4为被还原盐、PdCl2为诱导剂,采用诱导化学沉积法制备了系列NiB非晶态合金催化剂。将微量PdCl2负载于MgO载体上,通过化学镀法制备了NiB/MgO负载型非晶态合金催化剂。用XRD,ICP,SEM,TEM技术对催化剂的物性进行了表征,并将其用于环丁烯砜加氢反应。研究了制备条件(B/Ni摩尔比、NH3/Ni摩尔比及诱导剂的用量)对非晶态合金催化剂物化性能的影响。确定了制备NiB非晶态合金催化剂的最佳条件:硼镍摩尔比为2/1及NH3/Ni摩尔比为19/1。对于NiB/MgO负载型非晶态合金催化剂,镍的实际负载量为13 55%时,NiB/MgO催化剂与NiB催化剂的环丁烯砜加氢催化活性相当。

Preparation, Characterization and Catalytic Performance of NiB and NiB/MgO Amorphous Alloy Catalysts in Hydrogenation of Sulfolene

A series of NiB amorphous alloys and a supported amorphous alloy NiB/MgO were prepared by induction-chemical deposition method and powder electroless plating,respectively.Their amorphous structures and properties were characterized by XRD,ICP,SEM and TEM technologies.Their catalytic activities were examined in hydrogenation of sulfolene. Influences of preparation parameters (such as mole ratio of B/Ni,mole ratio of NH_3/Ni,and usage of inducer) on properties of NiB amorphous alloys were investigated.NiB amorphous showed the highest activity in hydrogenation of sulfolene alloy prepared with mole ratio of B/Ni and NH_3/Ni being 2/1 and 19/1,respectively.Although Ni loading on supported amorphous alloy catalyst NiB/MgO was only 13.55% (mass fraction),its catalytic activity was similar to that of optimum NiB amorphous alloy catalyst.