Catalytic Activity of Ferrates (NiFe₂O₄, ZnFe₂O₄ and CoFe₂O₄) on the Thermal Decomposition of Ammonium Perchlorate

Abstract

Three kinds of ferrates (NiFe2O4, ZnFe2O4 and CoFe2O4) were prepared via the facile solvothermal method and characterized using SEM, TEM, XRD, XPS, FT‐IR and BET instruments. The NiFe2O4, CoFe2O4 and ZnFe2O4 particles possess hollow structure with average particle size of 70, 220 and 360 nm, respectively. The catalytic performance of the ferrates for AP thermal decomposition were studied using DSC and TG‐DTG methods, and the decomposition mechanism of AP were suggested. The catalytic effects of different ferrates for AP thermal decomposition were significantly different. The CoFe2O4 has the best catalytic activity, and the high thermal decomposition peak temperature (THDP) and apparent activation energy (Ea) of AP were decreased by 108.99 °C and 37.38 kJ mol−1 in the presence of CoFe2O4 sample. Adding ferrates has no obvious influence on the gas‐phase decomposition products of AP, but has a great influence on the energy barrier of high temperature decomposition of AP. The excellent catalytic activity of CoFe2O4 is mainly attributed to the synergistic interaction between Fe and Co, which is conducive to the thermal decomposition of AP.

Nano Size NiCuZnFe2O4 Tri Metal Spinel Ferrite: Synthesis, Characterizations and Additive for Thermolysis of Ammonium Perchlorate

“…[7,9,10] Because of this drawback of physical method, different catalysts are being widely used to achieve lower thermal decomposition of AP. Catalysts like metals, [11,12] metal oxides, [6,[13][14][15][16][17] metal alloys, [8,[18][19][20][21] carbon supported catalysts, [22][23][24][25][26][27][28] metal hydroxides [29][30][31] are most investigated catalysts for achieve lower thermal decomposition temperature of AP via optimizing its decomposition route. AP decomposition undergoes two steps: one is LTD, low thermal decomposition in the range 280 °C-320 °C temperature that reveal gas products like perchlorate (HClO 4 ) and ammonia (NH 3 ); another is HTD, high thermal decomposition in the range 320 °C-450 °C temperature that reveal retreated gas mixtures of N 2 O, NO, O 2 and HCl, and release high amount of heat with ignition thrust.…”

“…[35] Previous work suggested that metal ferrites have high catalytic activity for the decomposition of AP. [8,21,32,33] However, the studies that focus on the AP decomposition explained kinetically and theoretically are reported that have important significance to researchers. The various effects like ensembles, ligand, and strain on adsorbate (bimetallic material) binding to metal surface was detailed studied [50] in which they explained theoretical studies of H-and O-binding parameters.…”

“…AP decomposition undergoes two steps: one is LTD, low thermal decomposition in the range 280 °C–320 °C temperature that reveal gas products like perchlorate (HClO 4 ) and ammonia (NH 3 ); another is HTD, high thermal decomposition in the range 320 °C–450 °C temperature that reveal retreated gas mixtures of N 2 O, NO, O 2 and HCl, and release high amount of heat with ignition thrust [35] . Previous work suggested that metal ferrites have high catalytic activity for the decomposition of AP [8,21,32,33] . However, the studies that focus on the AP decomposition explained kinetically and theoretically are reported that have important significance to researchers.…”

Tuning the microstructural and magnetic properties of CoFe2O4/SiO2 nanocomposites by Cu2+ doping

“…Cobalt ferrite (CoFe 2 O 4 ) with moderate saturation magnetization, high coercivity and Curie temperature, as well as excellent chemical stability has gained increasing attention in technological applications, such as magnetic recording, catalysis, biotargeted drug delivery, magnetic resonance imaging, and spintronics. [1][2][3][4][5][6][7] In general, CoFe 2 O 4 possesses a cubic inverse spinel structure with the Fd 3m space group,in which Co 2+ ions predominantly occupy octahedral B sites and Fe 3+ ions are almost equally distributed between tetrahedral A and octahedral B sites. However, cation distribution between the A and B sites varies with the chemical composition and synthesis procedure.…”

Facile Preparation and Properties of Crosslinked Copolyether Elastomers with 1,2,3‐Triazole and Urethane Subunit via Click Polymerization

“…This pre-polymer cured using GAP as an azide bearing polymer and the resultant crosslinked network copolymer provides superior processability and improved ballistic properties in terms of large amount of gas generating species during combustion. Zhang et al [19] synthesized azido terminated polyethylene glycol by halogenating reaction and azidation two-step method. And more significantly, the modifier gives a lower glass-transition temperature than parent polymer.…”