The thermal decomposition behavior of ammonium perchlorate (AP) directly influences the combustion performance of the composite solid propellants (CSPs). To enhance the effective thermal decomposition of AP, a highly active catalyst was prepared by entrapping Ni nanoparticles (NPs) inside three-dimensional hierarchically ordered porous carbon (3D HOPC). The obtained HOPC/Ni nanohybrid possessed interconnected porous structures, a high specific surface area (996 m² g^-1), large pore volume (1.43 cm³ g^-1), and highly dispersed Ni NPs. To investigate the catalytic activity of the HOPC/Ni nanohybrid for AP thermal decomposition, an AP/HOPC/Ni nanocomposite was synthesized by homogeneously confining AP nanocrystals into the HOPC/Ni nanohybrid to form a high contact area. Because of the synergistic effect between the 3D HOPC and Ni NPs as well as the size effect of the AP nanocrystals, the HOPC/Ni nanohybrid decreased the high-temperature decomposition (HTD) peak temperature of AP by 136.1 °C and increased the heat release from 371 to 2681 J g^-1, demonstrating better catalytic activity than the individual 3D HOPC and Ni NPs components. It can be foreseen that the HOPC/Ni nanohybrid may be a promising, highly active catalyst that meets the development needs of AP-based CSPs.

高氯酸铵（AP）的热分解行为直接影响复合固体推进剂（CSPs）的燃烧性能。为了增强AP的有效热分解，通过将Ni纳米颗粒（NPs）截留在三维层次有序的多孔碳（3D HOPC）中来制备高活性催化剂。所得HOPC / Ni纳米杂化体具有相互连接的多孔结构，比表面积高（996 m ²  g ^-1），孔体积大（1.43 cm ³  g ^-1））和高度分散的Ni NP。为了研究HOPC / Ni纳米杂化物对AP热分解的催化活性，通过将AP纳米晶体均匀地限制在HOPC / Ni纳米杂化物中形成高接触面积来合成AP / HOPC / Ni纳米复合物。由于3D HOPC和Ni NP之间的协同作用以及AP纳米晶体的尺寸效应，HOPC / Ni纳米杂化物将AP的高温分解（HTD）峰值温度降低了136.1°C，并增加了热量释放从371到2681 J g ^-1，显示出比单独的3D HOPC和Ni NPs组分更好的催化活性。可以预见，HOPC / Ni纳米杂化物可能是一种有前途的，高活性的催化剂，可以满足基于AP的CSP的开发需求。