A magnetic nitrogen-doped porous carbon material (Co/CoO_x@NC) with large surface area was synthesized for peroxymonosulfate (PMS) activation. The addition of reduced graphene oxide (rGO) remarkably improved the catalytic performance of Co/CoO_x@NC due to its enhancement on graphitization degree and structural regulation. Co/CoOx@NC exhibited excellent PMS activation for phenol removal with almost 100% removal efficiency in 10 min, close to that of homogeneous Co²⁺. Simultaneously, good reusability and recyclability of Co/CoO_x@NC was achieved, demonstrating its feasibility for practical application. The PMS activation process in Co/CoO_x@NC/PMS system was dominant by efficient mediation of electron transfer from pollutants to PMS through the sp²-hybridized carbon and nitrogen network. Batch tests of various organic compounds removal revealed the specific selectivity related to the electron-donating ability in Co/CoO_x@NC/PMS system. As the negligible role of reactive radicals on pollutants degradation, the inhibition of interfering species (e.g., Cl^-, natural organic matters) was largely weakened. Present study not only provided a strategy for rationally designing highly efficient nanocarbon-based catalysts on PMS activation, but also presented new insight into the mechanism of PMS heterogeneous activation.

合成了具有大表面积的磁性掺氮多孔碳材料 (Co/CoO _x @NC)，用于过硫酸盐 (PMS) 活化。还原氧化石墨烯（rGO）的添加显着提高了 Co/CoO _x @NC的催化性能，因为它增强了石墨化程度和结构调节。Co/CoOx@NC 表现出优异的 PMS 活化去除苯酚，在 10 分钟内去除效率接近 100%，接近均质 Co ^{2+ 的}去除效率。同时，Co/CoO _x @NC 实现了良好的可重用性和可回收性，证明了其实际应用的可行性。Co/CoO _{x 中}的 PMS 活化过程@NC/PMS 系统通过 sp ^{2 -}杂化碳和氮网络有效介导从污染物到 PMS 的电子转移。各种有机化合物去除的批量测试揭示了与 Co/CoO _x @NC/PMS 系统中的给电子能力相关的特定选择性。由于活性自由基对污染物降解的作用微乎其微，对干扰物质（如Cl ^-、天然有机物）的抑制作用大大减弱。本研究不仅为合理设计高效纳米碳基催化剂的 PMS 活化提供了策略，而且为 PMS 多相活化的机理提供了新的见解。