Fast synthesis of MoO3-x and its catalytic effect on the thermal decomposition of ammonium perchlorate based molecular perovskite (DAP-4)

In this work, it is shown that MoO 3-x has a positive effect on the thermal decomposition of ammonium perchlorate based molecular perovskite (H 2 DABCO)[NH 4 (ClO 4 ) 3 ] (DAP-4). MoO 3-x was prepared by heat treatment, and the morphology, structure, and thermal decomposition performance were characterized. The morphology and structure characterization results showed that MoO 3-x was an irregular layered structure material and the Mo element was mainly in the +6 chemical valence state, with a small amount of Mo 5+ . Thermal analysis results showed that the thermal decomposition peak temperature of DAP-4 was effectively reduced from 394.4 °C to 353.7 °C, 321.4 °C, and 312.5 °C in the presence of 1%, 5%, and 10% MoO 3-x , respectively. It is particularly worth noting that the maximum heat release rate of the DAP-4/10% MoO 3-x mixture was increased by 4.9 times compared with pure DAP-4. Through the two classic thermal decomposition kinetic methods, Kissinger and Starink, the reliable kinetic parameters of DAP-4/MoO 3-x were obtained. The increase of the reaction rate constant k indicated that the maximum thermal decomposition reaction rate of DAP-4 was effectively improved. This work provided a feasible technology for using MoO 3-x as an effective catalyst to improve the thermal performance of DAP-4.