Transition metal carbides with good chemical stability and moderate dielectric constants are becoming popular electromagnetic (EM) absorption materials. In this work, Mo₂C/Co/C composites, a ternary loss system (conductivity loss, polarization loss, and magnetic loss) for EM absorption, have been successfully fabricated by rationally regulating the growth of ZIF-67 on the surface of MoO₃ nanorods and subsequent pyrolysis process. The chemical compositions of Mo₂C/Co/C composites indeed play a dominant role in tailoring their EM functions. It is revealed that conductivity loss, polarization loss, and magnetic loss are together responsible for the attenuation of EM energy. Although the involvement of Mo₂C nanoparticles weakens magnetic loss capability to some extent, there will be a positive reinforcement in conductivity loss through the synergistic effects among different components. In addition, Mo₂C nanoparticles can further provide considerable dipole orientation polarization and interfacial polarization. Among these ternary composite, MCC-50 with 30.9% of carbon, 53.6% of Mo₂C, and 15.5% of Co, exhibits the best EM absorption performance, whose reflection loss intensity and qualified response bandwidth are superior to those of most carbide-based composites in previous studies. These results suggest that the rational integration of components with different loss mechanisms will be an effective pathway to enhance EM absorption.

具有良好化学稳定性和适度介电常数的过渡金属碳化物正成为流行的电磁（EM）吸收材料。在这项工作中，通过合理地调节ZO-67在MoO表面的生长，成功地制造了Mo ₂ C / Co / C复合材料，一种用于EM吸收的三元损耗系统（电导率损耗，极化损耗和磁损耗）。_3个纳米棒和随后的热解过程。Mo ₂ C / Co / C复合材料的化学成分确实在调整其EM功能中起着主导作用。揭示了电导率损耗，极化损耗和磁损耗共同导致了EM能量的衰减。虽然Mo ₂参与C纳米粒子在某种程度上削弱了磁损耗的能力，通过不同组分之间的协同效应，电导率损耗将得到正向增强。另外，Mo ₂ C纳米颗粒可以进一步提供相当大的偶极取向极化和界面极化。在这些三元复合材料中，碳含量为30.9％，Mo ₂ C为53.6％，Co为15.5％的MCC-50表现出最佳的EM吸收性能，其反射损失强度和合格的响应带宽优于大多数碳化物-以前的研究中基于复合材料。这些结果表明，具有不同损失机制的组分的合理整合将是增强EM吸收的有效途径。