Опубликована: Янв. 1, 2023

Adding burning-rate catalysts (BRCs) is highly effective for enhancing ammonium perchlorate (AP) thermal decomposition. To mitigate BRCs’ agglomeration and enhance their catalytic activity AP pyrolysis, five metal carbonyl compounds (Mo(CO)6, Cr(CO)6, W(CO)6, Fe2(CO)9, Mn2(CO)10) were refined into oxidized carbon nanotube (CNTs) cavities, respectively, by ultrasonication. The structures of the as-prepared nanocomposites examined with TEM, SEM, XPS, Raman, etc., confirming successful filling compounds. Electrochemical studies revealed that Mo(CO)6@CNTs(N1) exhibited an enhanced electron transfer rate superior electrocatalytic performance compared to CNTs(N1). Their evaluated DSC showed 5 wt.% exhibits best effect, increasing heat release 1850.62 J·g-1, advancing its peak temperature 80.6 oC, decreasing activation energy 100.45 KJ·mol-1. degradation mechanism catalyzed was probed through TG-FTIR-MS, in-situ solid FTIR, theoretical calculations. investigations suggested promoter in generates nanotubes-confined MoO3 nanoparticles featuring numerous Lewis Brønsted acidic sites, which not only improves NH3 adsorption but also enhances accelerates O2 conversion O2-, thereby facilitating pyrolysis. Finally, a plausible decomposition postulated.

Язык: Английский