高氯酸铵
材料科学
热分解
催化作用
复合材料
分解
推进剂
化学工程
比表面积
活化能
色散(光学)
复合数
有机化学
化学
物理
光学
工程类
作者
Songnan Qin,Zhengyi Zhao,Guofei Zhang,Xin Yu,Tong Zhu,Sirong Li,Ying Hu,Xuechun Xiao
出处
期刊:FlatChem
[Elsevier]
日期:2024-03-11
卷期号:45: 100634-100634
被引量:2
标识
DOI:10.1016/j.flatc.2024.100634
摘要
The catalytic active sites of the materials have a major role in the catalytic activity of nanocatalytic materials for the heat thermal decomposition of ammonium perchlorate. By adopting one-pot strategy to load MgCo2O4 onto MXene nanosheets, we were able to create highly dispersed MgCo2O4/MXene composites that improved the dispersion of the nanoparticles and increased the catalytic active sites. The MgCo2O4/MXene catalytic active sites were clearly optimized (Specific surface area increased from 115.4 of MgCo2O4 to 168.8 m2·g−1), according to the BET results. The performance tests demonstrated that the MgCo2O4/MXene composite effectively decreased the thermal decomposition temperature of AP, and the MgCo2O4/MXene composite significantly reduced the peak decomposition temperature of AP by 208.3 °C (from 471.2 °C of pure AP to 262.9 °C). The decomposition heat of AP increased from 782 J·g−1 of pure AP to 1453 J·g−1. In addition, the apparent activation energy of AP dropped from 296.19 kJ·mol−1 to 119.48 kJ·mol−1. Application of MgCo2O4/MXene composite to AP/HTPB-based composite solid propellants (CSPs) for combustion experiments resulted in an appreciable reduction in ignition delay time of ∼ 45 ms (from ∼ 51 ms to ∼ 6 ms). The highly dispersed MgCo2O4/MXene composite was a positive catalyst for AP-based composite solid propellant.
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