Gaseous Products Evolution Analyses for Catalytic Decomposition of AP by Graphene-Based Additives

Abstract

A quantitative evaluation method has been developed to study the effects of nanoadditives on thermal decomposition mechanisms of energetic compounds using the conventional thermogravimetry coupled with mass spectrometry (TG/MS) technique. The decomposition of ammonium perchlorate (AP) under the effect of several energetic catalysts has been investigated as a demonstration. In particular, these catalysts are transition metal (Cu2+, Co2+ and Ni2+) complexes of triaminoguanidine (TAG), using graphene oxide (GO) as dopant. They have been well-compared in terms of their catalytic effects on the concentration of the released gaseous products of AP. These detailed quantitative analyses of the gaseous products of AP provide a proof that the proton transfer between ∙O and O2 determines the catalytic decomposition pathways, which largely depend on the type of reactive centers of the catalysts. This quantitative method could be applied to evaluate the catalytic effects of any other additives on the thermal decomposition of various energetic compounds.

Thermostable Energetic Coordination Polymers Based on Functionalized GO and Their Catalytic Effects on the Decomposition of AP and RDX

“…The resulting GO-based composites EMs exhibited higher thermal stability and higher heat release, where the stabilization effect is due to heat dissipation and enhanced intramolecular interaction of GO with the ligands . It has been revealed that the use of T·HNO 3 as a replacement for T·HCl provided higher thermostable compounds with better thermal features. , The results showed that the hybrid ECP catalysts can enhance the initial decomposition temperature and change the thermolysis mechanism of RDX and HMX through introducing different types of metal ions. , The detailed effect of nanoadditives, especially GO-based energetic catalysts, on thermolysis products and reaction pathways of AP are well investigated as well . Moreover, the type of ligands such as tetrazole-based ones has significant effects on heat releases and catalytic behavior of these ECPs …”

“…19,21 The detailed effect of nanoadditives, especially GO-based energetic catalysts, on thermolysis products and reaction pathways of AP are well investigated as well. 23 Moreover, the type of ligands such as tetrazole-based ones has significant effects on heat releases and catalytic behavior of these ECPs. 24 In the present work, based on the similar above-mentioned functionalization approach, several new ECPs were fabricated by using T-functionalized GO layers as dopants, which can further bridge transition metal ions using extra nitrogen-rich ligand T to form promising thermostable catalysts.…”