Room-temperature synthesis of HKUST-1 and its catalytic function in the thermal decomposition of ammonium perchlorate

In this article, copper-based metal organic framework (MOF) HKUST-1 was synthesized via room temperature stirring method, and a series of HKUST-1/AP composite particles with different mass ratios were prepared via mechanical grinding method; The morphology and structure of the prepared HKUST-1 were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), and the particle size data were measured by laser particle size analyzer; Thermogravimetric analysis-differential scanning calorimetry (TG-DSC) was employed to evaluate the catalytic activity of HKUST-1 during AP thermal decomposition. The results revealed that variations in copper salt type exerted a marked influence on HKUST-1's powder particle size. The addition of 4 % HKUST-1-C, HKUST-1-S, HKUST-1-N, and HKUST-1-Cl respectively reduces the high-temperature decomposition (HTD) temperature of AP by 113.5 °C, 113.1 °C, 107.4 °C, and 107.7 °C. Concurrently, the heat release of AP undergoes a dramatic increase, rising from the initial 415.71 J/g to 1188 J/g, 1181 J/g, 864.8 J/g, and 856.8 J/g for each corresponding sample. Among them, HKUST-1-C demonstrated superior catalytic performance, characterized by a remarkable reduction in the HTD of ammonium perchlorate by 110.8 °C with only a 2 % addition. Notably, this catalyst enhanced heat release by 750.3 J/g and decreased the reaction activation energy by 66.9 kJ/mol, thereby significantly improving the overall thermodynamic efficiency of the system.