MoS2 stabilize Ti3C2 MXene for excellent catalytic effect of thermal decomposition of ammonium perchlorate.

Ammonium perchlorate (AP), the most widely used oxidizer in energetic materials, is crucial for studying catalytic thermal decomposition. Newly discovered Ti 3 C 2 MXene and MoS 2 demonstrating promising prospects in the field of the pyrolysis catalyst in AP. In this study, we employed a hydrothermal method to anchor nano-sized MoS 2 in situ on the surface of Ti 3 C 2 MXene, leading to the fabrication of MoS 2 -Ti 3 C 2 nanocomposites. Various characterizations indicated that MoS 2 was attached to the surface and edges of Ti 3 C 2 , thereby enhancing the stability and conductivity. Results revealed that upon the addition of 4 wt% MoS 2 -Ti 3 C 2 , the low-temperature decomposition peak of AP reduced from 331.2 °C to 296.6 °C, while the high-temperature decomposition peak advanced from 427.5 °C to 387.1 °C, showing a superior catalytic effect compared to the individual MoS 2 or Ti 3 C 2. Additionally, the catalytic mechanism of MoS 2 -Ti 3 C 2 on the thermal decomposition of AP may involve enhanced electrical conductivity, facilitating rapid proton transfer (H+), accelerated redox reactions, prompt release of gas products, and thereby expediting the progression of the decomposition reaction. Consequently, it can be anticipated that anchoring MoS 2 on the surface of Ti 3 C 2 represents an effective strategy for enhancing the catalytic activity of Ti 3 C 2 MXene towards the thermal decomposition of AP. • MoS 2 was anchored on the surface of Ti 3 C 2 through DMSO extension and PDDA modification. • MoS 2 -Ti 3 C 2 offers better electrical conductivity and enhances the catalytic effect on AP's thermal decomposition. • Thermodynamic calculations with varying temperature gradients were conducted to illustrate the catalytic effect. • Catalytic mechanism of AP's thermal decomposition was deduced via pre-release and concentrated release of product gas. [ABSTRACT FROM AUTHOR]