Enhanced thermal decomposition performance of sodium perchlorate by molecular assembly strategy
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NaClO4-based molecular perovskite (H2dabco)[Na(ClO4)3] combined with the inorganic oxidizer and organic fuel was prepared by molecular assembly strategy. The high-yield samples were obtained by the one-pot reaction of NaClO4, HClO4, and triethylenediamine (dabco). The thermal analysis results showed molecular perovskite (H2dabco)[Na(ClO4)3] with ABX3-type closely ternary molecular stacking structure had a lower decomposition temperature (381.7 °C) and a higher heat release (2770 J/g) than NaClO4 (569.2 °C and 353 J/g). The apparent activation energy of thermal decomposition process was reduced by 25 kJ/mol from 184.8 kJ/mol of NaClO4 to 159.8 kJ/mol of (H2dabco)[Na(ClO4)3]. A synergistic catalysis thermal decomposition mechanism was proposed. The H2dabco2+ from the unique ternary molecular perovskite structure can be favorable for proton excitation under thermal stimuli, and promote the formation of HClO4 and superoxide radical anions ·O2− further, resulted in the redox thermal decomposition reaction between oxidizer ClO4− and fuel dabco more completely.
KeywordsOrganic-inorganic Fuel (H2dabco)[Na(ClO4)3] Molecular perovskite Thermal decomposition performance
The authors thank Prof. Weixiong Zhang and Dr. Shaoli Chen (Sun Yat-sen University, Guangzhou, China) for support and help.
This work was supported by the Natural Science Foundation of China (21975024 and 11372290).
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Conflict of interest
The authors declare that they have no conflict of interest.
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