Metal − organic framework (MOF) derived carbon-based nanocatalysts have received great attention in environmental remediation applications. Herein, a hollow carbon polyhedron with nitrogen-coordinated cobalt embedded has been synthesized by thermal transformation of the core–shell structure ZIF-8@ZIF-67 (marked as ZIF-8@ZIF-67-C). Remarkably, the ZIF-8@ZIF-67-C catalyst could remove almost 98% of CH₃SH after running for 60 min, exceeding the reported values (about 30 times higher than that of commercial MnO₂ catalysts). Elimination performance experimental results demonstrate that ZIF-8@ZIF-67-C has better anti-interference ability and anti-toxicity properties. The excellent catalytic performance can be attributed to the following facts: unique structure, high conductivity, abundant hierarchical porous structure, and accessible active sites. Theoretical calculation reveals the mechanism is that the Co-N electron bridge promotes Co nanoparticles adsorb O₃, providing electrons to O₃ and producing ¹O₂ to further oxidize CH₃SH into CO₂/SO₄²⁻. Also, the ZIF-8@ZIF-67-C catalyst supported on Al₂O₃ still shows excellent catalytic activity and durability, which deepened the practical application. This work provides a strategy for the development of MOF-on-MOF-derived metal/carbon hybrid materials in environmental applications.

金属有机骨架（MOF）衍生的碳基纳米催化剂在环境修复应用中受到了极大的关注。在此，通过核壳结构ZIF-8@ZIF-67的热转变合成了嵌入氮配位钴的中空碳多面体（标记为ZIF-8@ZIF-67-C）。值得注意的是，ZIF-8@ZIF-67-C催化剂运行60分钟后可以去除近98%的CH ₃ SH，超过报道值（比商业MnO _{2高约30倍）}催化剂）。消除性能实验结果表明ZIF-8@ZIF-67-C具有更好的抗干扰能力和抗毒性特性。优异的催化性能归因于以下事实：独特的结构、高电导率、丰富的分级多孔结构和可接近的活性位点。理论计算表明，其机理是Co-N电子桥促进Co纳米颗粒吸附O ₃，向O ₃提供电子并产生¹ O ₂，​​进一步将CH ₃ SH氧化成CO ₂ /SO ₄ ²⁻。_{此外，负载在Al 2} O ₃上的ZIF-8@ZIF-67-C催化剂仍表现出优异的催化活性和耐久性，从而加深了实际应用。这项工作为环境应用中 MOF-on-MOF 衍生的金属/碳杂化材料的开发提供了策略。