Zeolite Imidazolate Frameworks-67 Precursor to Fabricate a Highly Active Cobalt-Embedded N-Doped Porous Graphitized Carbon Catalyst for the Thermal Decomposition of Ammonium Perchlorate,ACS Omega

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Zeolite Imidazolate Frameworks-67 Precursor to Fabricate a Highly Active Cobalt-Embedded N-Doped Porous Graphitized Carbon Catalyst for the Thermal Decomposition of Ammonium Perchlorate
ACS Omega ( IF 3.7 ) Pub Date : 2021-09-24 , DOI: 10.1021/acsomega.1c03427
Huiyu Liu ₁ , Zhiliang Guo ₁ , Qingchun Zhang _{1,

2} , Bo Jin ₁ , Rufang Peng ₁

Affiliation

The more apparent specific heat release at a lower high-temperature decomposition (HTD) temperature of ammonium perchlorate (AP) poses a challenge for the development of highly active catalysts. In this work, a well-designed cobalt-embedded N-doped porous graphitized carbon (Co@NC) catalyst is obtained by high-temperature calcination of a zeolite imidazolate frameworks-67 precursor, in which the cobalt catalytic active center realizes effective nanoscale dispersion; meanwhile, the cobalt and N-doped porous graphitized carbon can release considerable heat after oxidation, and the cobalt oxides have an excellent catalytic effect on reducing the HTD temperature of AP. The catalytic activity of Co@NC was tested by a differential thermal analytical method. The results indicated that the HTD peak of AP was significantly decreased by 100.5 °C, the apparent activation energy of the HTD reaction of AP was reduced by 82.0 kJ mol^–1, and the heat release compared with pure AP increased 2.9 times. On teh basis of these findings, Co@NC is expected to be one of the best candidate materials for AP thermal decomposition.

中文翻译：

沸石咪唑酯骨架 67 前驱体制备高活性钴嵌入氮掺杂多孔石墨化碳催化剂用于高氯酸铵热分解

高氯酸铵（AP）在较低的高温分解（HTD）温度下更明显的比热释放对高活性催化剂的开发提出了挑战。本工作通过高温煅烧咪唑骨架-67沸石前驱体得到了精心设计的钴嵌入氮掺杂多孔石墨化碳（Co@NC）催化剂，其中钴催化活性中心实现了有效的纳米级分散;同时，钴和氮掺杂多孔石墨化碳氧化后能释放大量热量，钴氧化物对降低AP的HTD温度具有优异的催化作用。采用差热分析方法测试了Co@NC的催化活性。结果表明，AP的HTD峰显着降低了100.5 ℃，AP的HTD反应表观活化能降低了82.0 kJ mol ^–1 ，放热量比纯AP增加了2.9倍。基于这些发现，Co@NC 有望成为 AP 热分解的最佳候选材料之一。

更新日期：2021-10-06

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