Abstract
In this paper, we investigated the effect of Iron carbide-nitride/reduced graphene oxide composites (FeCxNy/rGO) as catalysts on the thermal decomposition of energetic molecular perovskite (H2dabco)[M(ClO4)3] (DAPs, M = Na+, K+ and NH4+ for DAP-1, -2, and -4). FeCxNy/rGO were fabricated by two-step method combined with chemical synthesis and sinter technology of Prussian blue/reduced graphene oxide (PB/rGO). The morphology and structure of FeCxNy/rGO were characterized. The thermal decomposition performance of DAPs with FeCxNy/rGO catalyzed were studied. Results showed that FeCxNy particles with mainly Fe–C and Fe–N bonds involved were located at the surface of rGO nanosheets, the peak thermal decomposition temperature and the apparent activation energy of DAPs were both significantly decreased in the presence of FeCxNy/rGO. Among them, with 5 wt% FeCxNy/rGO-2 added, the peak temperature of DAP-1, DAP-2, and DAP-4 have been decreased by 104.8 °C, 110 °C and 102.2 °C, respectively. Their apparent activation energy decreased significantly by 4.0 kJ/mol, 74.9 kJ/mol and 66.9 kJ/mol, respectively. A possibly thermal catalysis decomposition mechanism was provided. This work provides a new idea for design and fabrication of multifunctional catalysts to enhance the thermal decomposition of energetic molecular perovskite and offers the possibility of applying DAPs to rocket solid propellant.
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