【摘要】 采用微乳液法制备了立方晶系的NdCoO3纳米晶。利用DSC/TG-MS研究了NdCoO3对AP热分解的催化作用。结果表明,在NdCoO3的催化作用下,AP的热分解反应峰值温度下降了113℃,表观分解反应热从655 J.g-1增加到1 363 J.g-1,分解的气相产物主要有NH3,H2O,O2,HCl,N2O,NO,NO2和Cl2。在金属氧化物表面吸附生成超氧化离子(O2-)和氧离子(O-,O2-),这是加速AP分解反应的主要原因。加入NdCoO3催化AP热分解,由于对氨的氧化深度不同而导致分解放热量的增加。更多还原

【Abstract】 Cubic structural perovskite NdCoO3 nanocrystals were prepared by microemulsion method.The catalytic effect of the NdCoO3 for thermal decomposition of ammonium perchlorate(AP) was investigated by DSC and TG-MS.The results revealed that the NdCoO3 nanoparticles had effective catalysis on the thermal decomposition of AP.Adding 2% of NdCoO3 nanoparticles to AP decreased the temperature of thermal decomposition by 113 ℃ and increased the heat of decomposition from 655 J.g-1 to 1 363 J.g-1.Gaseous products of thermal decomposition of AP were NH3,H2O,O2,HCl,N2O,NO,NO2 and Cl2.The mechanism of catalytic action was based on the presence of superoxide ion(O2-) and oxygenic ion(O-,O2-) on the surface of NdCoO3,and the difference of thermal decomposition of AP with 2% of NdCoO3 and pure AP was mainly caused by the different extent of oxidation of ammonium.更多还原