Template-assisted synthesis of macroporous ZIF-8 derived ZnO/nitrogen-doped carbon composites: Catalytic mechanism and combustion performance for efficient ammonium perchlorate decomposition

影响因子：5.4

DOI码：10.1016/j.colsurfa.2026.140465

发表刊物：Colloids and Surfaces A: Physicochemical and Engineering Aspects

关键字：Surface engineering, Macroporous，ZnO，Ammonium perchlorate，Heterogeneous catalysis

摘要：In heterogeneous catalytic reactions, such as the metal oxide–catalyzed thermal decomposition of ammonium perchlorate (AP), major challenges including catalyst agglomeration and limited exposure of active sites remain unresolved. These issues significantly hinder effective interfacial reactions and ultimately restrict the overall catalytic efficiency. Therefore, the key objective is to engineer the catalyst’s surface and interface to achieve uniform dispersion and full exposure of the active sites. In this study, polystyrene (PS) spheres are used as sacrificial templates to successfully prepare a macroporous and metal-site-dispersed ZnO/nitrogen-doped carbon composite (N2-M-ZIF-8) with ultra-high specific surface area (SBET) of 1754 m2·g−1. N2-M-ZIF-8 reduces the high-temperature decomposition (HTD) peak temperature of AP from 420.6 ℃ to 279.0 ℃, with a decrease of 141.6 ℃ (∼33%). The thermogravimetry-infrared (TG-IR) analysis confirms that the catalyst has high selectivity for the oxidation products of AP decomposition product NH3, with N2O accounting for 87.8%. Kinetic calculations and mechanism analysis reveal that the high SBET of N2-M-ZIF-8 enhances the adsorption capacity for AP gaseous decomposition products. The lattice oxygen and oxygen vacancies on the ZnO surface form a dynamic oxygen cycle, which effectively alleviates the kinetic limitations caused by the difference in diffusion rates between NH3 and HClO4 and accelerate the thermal decomposition process of AP. Combustion experiments show that N2-M-ZIF-8 shortens the combustion duration of AP from 551 ms to 104 ms, significantly reducing ignition delay and improving combustion stability. This study provides new ideas and experimental basis for the design of high-activity AP decomposition catalysts for optimizing the performance of solid propellants.

合写作者：Zhou Yuming,Li Junyu,Zheng Zeyu

通讯作者：Gong Chuqing*,Zhang Yifu*,Huang Chi*

论文编号：140465

文献类型：J

卷号：742

页面范围：140465, 2026

是否译文：否

收录刊物：SCI

发布期刊链接：https://doi.org/10.1016/j.colsurfa.2026.140465