基于MOF骨架Fe-W碳化物用于硝基芳烃选择性加氢的研究

MOF based Fe-W carbide for selective hydrogenation of nitro-aromatics

基于金属-有机骨架材料(MOF)制备了一类新型双金属碳化物催化剂。将磷钨酸(PTA)包覆在铁-MOF中,通过惰性气氛高温焙烧得到了双金属碳化物,并研究了其催化加氢性能。其中,900℃高温焙烧得到的Fe6W6C晶体在加氢反应中起到了关键的作用。PTA@MOF-900表现出很高的硝基芳烃和苯乙炔的加氢活性(>86%),且其加氢选择性接近100%,对于不同反应底物均具有较好的普适性。该催化剂循环使用5次,催化活性仍能维持在70%左右。

A novel kind of bimetal carbide catalyst is fabricated on the base of metal-organic framework（ MOF）materials.Phosphotungstic acid（ PTA） is clad by Fe-MOF,and is then calcined at high temperature inert atmosphere to form bimetal carbide. The catalytic hydrogenation performance of the prepared bimetal carbide is studied. In which,the Fe6W6 C crystal obtained at high-temperature（ 900℃） calcination plays a key role in the hydrogenation reaction of nitroaromatics.Importantly,PTA @ MOF-900 exhibits very high activity（ 〉86%） nearly 100% hydrogenation selectivity in hydrogenation of nitro-aromatics and phenylacetylene,and is well suitable for different reaction substrates. The catalytic activity of this catalyst can maintain 70% after 5 times of circle uses.