A series of N-enriched active carbons (NACs) were prepared from carbonization of tobacco stem with KOH as activating agent. The obtained NACs were used as efficient metal free catalysts for reduction of nitroarene. The results of N₂ adsorption–desorption indicate that NACs have a large number of mesopores with the increase of mass ratio of KOH to the precursor. NACs-3₈₀₀ has high surface area (S_BET = 2938 m² g⁻¹) and a large pore volume (V_total = 1.60 cm³ g⁻¹) with a nitrogen content (1.32%). NACs-3₈₀₀ showed a high catalytic activity (99.9% conversion, nearly 100% selectivity to aniline) in the reduction of nitrobenzene. Moreover, NACs-3₈₀₀ also exhibits good catalytic activity in the reduction of substituted nitroarenes. Furthermore, the NACs-3₈₀₀ presented remarkable activity and durability for nitrobenzene reduction to the corresponding aniline. The recyclability of the catalyst and its cheap feedstock makes the overall process much simple, cost-efficient and environment-friendly.

以KOH为活化剂，通过烟梗炭化制备了一系列富氮活性炭（NACs）。所获得的NAC被用作用于还原硝基芳烃的有效的无金属催化剂。N ₂吸附-解吸的结果表明，随着KOH与前驱体质量比的增加，NACs具有大量的中孔。顾问委员会-3 ₈₀₀具有高的表面积（S _BET  =2938米² 克^-1）和一个大的孔体积（V_总 =1.60厘米³ 克^-1）与氮含量（1.32％）。NAC-3 ₈₀₀在硝基苯的还原反应中显示出高催化活性（99.9％的转化率，对苯胺的选择性近100％）。此外，NACs 3 ₈₀₀在还原取代的硝基芳烃方面也表现出良好的催化活性。此外，NACs 3 _800具有出色的活性和耐久性，可将硝基苯还原成相应的苯胺。催化剂及其廉价原料的可回收利用性使整个过程变得非常简单，经济高效且环境友好。