▎ 摘　　要

Porous carbon (PC) materials have attracted great attention in a variety of fields ranging from energy, catalysis to separation systems. It is well known that the pore structure and heteroatoms of PCs are crucial to their functions and applications. In this study, nitrogen and sulfur-codoped mesoporous carbon materials (GCs) were facilely fabricated by carbonizing the complex of poly(3-cyanomethyl-1-vinyl imidazolium bis(trifluoromethane sulfonyl)-imide) (PCMVIm-Tf2N) and graphene oxide (GO). After investigating the electrochemical performances of GC systematically, the as-obtained GCs were evaluated as the electrocatalysts in hydrogen evolution reaction (HER). The results demonstrated that the optimal electrocatalysis activity for HER could be achieved when the weight ratio of PCMVIm-Tf2N and GO in the precursor was 7:1 (GC-7). Specifically, GC-7 presented the overpotential as low as 118.7 mV at the current density of 10 mA cm(-2) and a small Tafel slope of 52 mV dec(-1) in 0.5 M H2SO4. Moreover, GC-7 maintains excellent long-term stability in both acid and alkaline conditions. Our results demonstrated that the superior HER catalytic activity was attributed to the large surface area and good ionic conductivity, as well as synergistic effect of heteroatoms. Therefore, GC materials are the promising electrocatalysts for the highly efficient HER.