Nano or micro? A mechanism on thermal decomposition of ammonium perchlorate catalyzed by cobalt oxalate.
Nano or micro? A mechanism on thermal decomposition of ammonium perchlorate catalyzed by cobalt oxalate.
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DOI：
10.1016/j.jhazmat.2012.05.010
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发表时间：
2012-07
影响因子：
13.6
通讯作者：
Mingxuan Zou;Xiaohong Jiang;Lu-de Lu-Lu-de-Lu-6585788;Xin Wang
中科院分区：
文献类型：
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作者：
Mingxuan Zou;Xiaohong Jiang;Lu-de Lu-Lu-de-Lu-6585788;Xin Wang
在表面活性剂存在下，制备了不同形貌的微米级钴酸盐。采用差热分析（DSC）研究了催化剂形貌对高氯酸铵（AP）热分解的影响。值得注意的是，与广为接受的概念相反，没有观察到催化剂的形态与其活性之间的直接关系。根据反应过程中催化剂的结构和形态变化，提出了草酸钴催化高氯酸铵热分解的催化机理。我们认为，正是反应中发生的“自破碎和自分布”才真正有助于提高整体催化活性。在该过程中，催化剂和反应物均被自动破碎并均匀分布。本工作提供了一个深入的洞察AP的热分解机理的催化剂。
Micrometer-sized cobalt oxalates with different morphologies have been prepared in the presence of surfactants. The effect of catalysts morphology on the thermal decomposition of ammonium perchlorate (AP) was evaluated by differential thermal analysis (DSC). Remarkably, contrary to the well-accepted concepts, no direct relationship between the morphologies of catalysts and their activities has been observed. Based on the structural and morphological variation of the catalysts during the reaction, a catalytic mechanism on thermal decomposition of ammonium perchlorate catalyzed by cobalt oxalate is proposed. We believe that it is the “self-crushing and self-distributed” occurred within the reaction that really works for the improvement of the overall catalytic activities. In this process, both catalysts and reactants have been crashed and distributed uniformly in an automatic way. This work provides an in-depth insight into the thermal decomposition mechanism of AP as catalyzed by oxalates.