Preparation Of Fe-N-C Composite And Researching On Its Catalyzed Benzyl Oxidative And Alkene Epoxidative Performance

As a new type of non-noble metal catalyst,nanoscale Fe-N-C materials have be widely utilized in organic reactions and electrochemcial catalysis,because of their highly catalytic performance.In this paper,a new Fe-N-C material has been designed and utilized in catalytic oxidation of benzyl position and epoxidation of styrene.As a result,the Fe-N-C materials show highly efficiency to the selective oxidation of benzyl position and a moderate-efficiency to the epoxidation of styrene.Frist of all,the Fe-N-C materials were synthesized by impregnation-heat treatment with g-C₃N₄and iron nitrate as starting materials.The catalyst were then characterized by SEM,TEM,XRD,XPS,BET and FT-IR.The data shows that the new Fe-N-C materials have a mesoporous lamellar structure,and FeN_x species might be formed by the coordination of iron and pyridinic N,which was believed as the key active species in the Fe-N-C catalyzed oxidation.Selective oxidation of ethylbenzene is then selected as a protype to verify catalytic performance of Fe-N-C.After optimization,the ethylbenzene can smoothly transfer to acetophenone with good yield（Conv.89%,Sel.93%）.Furthermore,the catalyst has an excellent recyclability for at least five runs without a considerable loss in catalytic activity.In addition,a wide scope of substrate also smoothly oxidized to get the corresponding carbonyl compounds under optimal condition.Epoxidation of styrene is also explored.Under suitable conditions,styrene can transfer to styrene oxide with a medium yield.In conclusion,a new Fe-N-C material is synthesized by a simple and cheap method in this paper.This catalyst shows an excellent activity in selective oxidation of benzyl position as well as a medium catalytic performance to epoxidation of styrene.