▎ 摘　　要

A hierarchical architecture designated as Fe5C2@Ns-rGO/CNT, consisting of carbon nanotubes, steam activated N-doped reduced graphene oxides, and activated iron carbide nanoparticles, was prepared via microwave irradiation and subsequent CO activation. The Fe5C2@Ns-rGO/CNT was successfully applied to a rapid CO hydrogenation reaction showing extremely high activity of 4.4 x 10(-3) mol(CO) g(Fe)(-1) s(-1) at a fast gas velocity of 210 NL g(cat)(-1) h(-1).