Transition metal sulfides (TMSs)-based materials have been extensively investigated as effective non-noble catalysts for various applications. However, the exploration of TMSs-based catalysts for hydrogenation of nitro compounds is limited. Herein, CoS_x/NC catalysts were prepared by solvothermal sulfurization of ZIF-67, followed by high-temperature annealing (300–600 °C) under NH₃ atmosphere. It was found that the structures and compositions of the as-prepared CoS_x/NC can be readily tuned by varying the annealing temperature. Particularly, CoS_x/NC-500, which possesses higher degree of S defects and larger specific surface areas, can achieve high conversion, selectivity and stability for catalytic reduction of nitro compounds into amines under mild reaction conditions.

基于过渡金属硫化物 (TMS) 的材料已被广泛研究作为各种应用的有效非贵金属催化剂。然而，基于 TMSs 的硝基化合物加氢催化剂的探索是有限的。在此，CoS _x /NC 催化剂通过 ZIF-67 的溶剂热硫化制备，然后在 NH ₃气氛下高温退火（300-600 °C）。发现所制备的 CoS _x /NC的结构和组成可以通过改变退火温度轻松调整。特别是 CoS _x/NC-500具有更高的S缺陷度和更大的比表面积，在温和的反应条件下可以实现高转化率、高选择性和高稳定性催化硝基化合物还原成胺。