It has been found that composites based on Co,N,S-doped carbon and Co₉S₈ can act as catalysts for the hydrogenation of quinoline and its monomethyl derivatives providing the formation of 1,2,3,4-tetrahydroquinolines with 75-99% yields. The high efficiency of these systems is caused first of all with the presence of Co-N_x sites in their composition, which are formed as a result of the pyrolysis of cobalt salts and poly-5-aminoindole. The use of highly dispersed Vulcan XC72R carbon black as a component of the reaction mixture during the composite catalyst preparation by the pyrolysis contributes to a greater extent to the formation of active Co-N_x sites in them, compared to graphene oxide or in the case when a carbon component is not added.

已经发现，基于 Co,N,S 掺杂的碳和 Co ₉ S ₈的复合材料可以作为喹啉及其单甲基衍生物氢化的催化剂，提供 1,2,3,4-四氢喹啉与 75- 99% 的收益率。这些系统的高效率首先是由于其组成中存在 Co-N _x位点，这些位点是钴盐和聚 5-氨基吲哚热解的结果。在通过热解制备复合催化剂期间，使用高度分散的 Vulcan XC72R 炭黑作为反应混合物的组分，有助于更大程度地形成活性 Co-N _x与氧化石墨烯或未添加碳成分的情况相比，它们中的位点。