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核壳结构纳米催化剂的发展一直备受化学家的关注.我们通过热解碳担载乙酸钴和1,10-菲啰啉复合物制备出具有核壳结构的氮掺杂石墨烯包裹钴催化剂,并对其进行了系统的表征和催化性能研究.研究发现,该催化剂在TBHP和H_2共存的条件下,在催化硝基苯和甲苯的选择性还原-氧化胺化合成N-烷基化胺反应中展现出较好的催化性能和良好的官能团耐受性.透射电镜表征表明氧化钴纳米颗粒被厚度约1.12~1.87 nm的含氮石墨烯壳包裹.X射线光电子能谱表征发现壳层中的石墨烯氮和作为核的氧化钴纳米颗粒间具有较明显的相互作用.我们对催化体系的普适性以及反应机理也进行了较为系统的研究.
The development of nanocatalysts with core-shell structure has been paid much attention by chemists.We prepared a cobalt-doped nitrogen-doped graphene catalyst with core-shell structure by pyrolytic carbon supported cobalt acetate and 1,10-phenanthroline complex, The catalytic characterization and catalytic characterization of the catalyst were studied systematically.The results showed that under the condition of TBHP and H 2 coexistence, the catalyst catalyzed the selective reductive-oxidative amination of nitrobenzene and toluene to synthesize N-alkylamine Showed good catalytic performance and good functional group tolerance.The transmission electron microscopy showed that the cobalt oxide nanoparticles were coated by a nitrogen-containing graphene shell with a thickness of about 1.12 ~ 1.87 nm.X-ray photoelectron spectroscopy showed that in the shell Graphene nitrogen and cobalt oxide nanoparticles as the core has a more obvious interaction between the catalytic system and the universality of our reaction mechanism has also been more systematic study.