氮掺杂纳米管包覆金属钴催化苯甲醇和苯胺一步N-烷基化反应

Nitrogen-doped Carbon Nanotube Encapsulated Cobalt Catalytic N-alkylation of Benzyl alcohol with Aniline

通过直接热解三聚氰胺、硝酸钴和葡萄糖混合物制备氮掺杂碳纳米管包覆金属钴催化剂(Co@NCNT).Co@NCNT具有较大的比表面积、均匀的氮分布以及包覆结构.在苯甲醇和苯胺一步法N-烷基化反应中Co@N CNT具有较高的催化活性,且循环4次反应活性没有明显的变化.控制实验和中毒实验表明金属Co和N对催化活性起着重要的作用,同时金属Co是中间产物N-苄叉苯胺加氢的主要活性位.

Nitrogen doped carbon nanotube encapsulated cobalt （ Co@ NCNT） catalysts were prepared by direct py- rolysis the complex of melamine, cobalt nitrate and glucose. Co@ NCNT possesses high surface area, homogeneous nitrogen dispersion and encapsulation structure. Co@ NCNT shows efficient catalytic performance in the reaction of N-alkylation of aniline with benzyl alcohol, and the catalyst could reuse four times without obviously decrease in catalytic performance. Control experiments demonstrate that the cobalt and nitrogen played an important role in the catalytic performance, and poisoning tests illustrate that Cobalt was the active sites for hydrogenation of the interme- diate N-benzylideneaniline.