14380-61-1Relevant articles and documents
Hammar, L.,Wranglen, G.
, p. 1 - 16 (1964)
Two-dimensional cluster catalysts with superior thermal stability and catalytic activity for AP
Guo, Yanli,Liang, Taixin,Liu, Wei,Song, Ruidong,Wang, Chao,Xiao, Fei,Zhang, Jiangbo
, (2022/01/08)
The preparation of catalysts with small particle size, large specific surface area and high atomic utilization has always been the focus of research in the field of catalysis. As for energetic materials, catalysts are always used to improve the thermal decomposition performance of ammonium perchlorate (AP) as it has significant effect on the power of engine. In this work, a two-dimensional metal clusters catalyst has been successfully prepared by solvothermal and heat treatment to improve thermal decomposition performance of AP. In detail, the transition metal ions were supported on the graphene oxide (GO) surface by organic ligands linking, followed by heat treatment to obtain two-dimensional rGO based metal clusters catalyst. The morphology and structure of the catalysts at different temperatures and their effect on AP decomposition were studied, the results show that catalyst at 300 °C has a particle size of 20 nm and uniformly distributed on rGO. The catalyst promotes the high temperature decomposition of AP by 73.7 °C with improved stability, and increases the heat release from 652.73 J/g to 1392.11 J/g. This may be attributed to good conductivity of GO and the strong gain-loss electron ability of the metal clusters. The presence of GO increased the active sites for cluster catalysis, additional, the metal clusters have a positive synergistic effect with GO. Thus, the thermal decomposition performance of AP was enhanced meanwhile thermal stability can also be improved.
The Primary Process ClO3- (+hν) ClO- + O2 in the Photolysis of Aqueous ClO3- Solutions
Klaening, U. K.,Sehested, K.
, p. 740 - 743 (2007/10/02)
The quantum yield, Φ1, in the primary process ClO3- (+hν) ClO- + O2 (1) and the sum of the quantum yields Φ1 + Φ2 in the primary processes ClO3- (+hν) ClO2 + O- (2) and ClO3- ClO2- + O(3P) (3) were measured in the steady state photolysis of aqueous ClO3- solutions at 214 and 229 nm.The ratio of the yields of ClO- and ClO3- in the reactions ClO2 ClO- + O2 and ClO2 + O- ClO3- (4) was determined by γ-radiolysis of aqueous solutions of ClO2 at varying pH.The finding that the ratio between the yields of ClO- and ClO3- in reactions 4 equals the ratio between Φ1 and the quantum yield, Φ0 = 1 -Φ1 - Φ2 - Φ3, for ClO3- returning to the ground state is taken as evidence that process 1 results from a cage-back reaction.This result combined with recent studies of the radiolysis of KClO3 crystals suggest that the primary processes in the photolysis of aqueous ClO3- originate in a common process by which O- is expelled from ClO3- upon photoexcitation.The expelled O- may escape the solvent cage containing ClO2 (process 2), or react in cage-back reaction (process 0 and 1).During the expulsion of O- the photoproducts may convert to ClO2- and O(3P) (process 3).
Gas-Phase Reactions of O- and O2- with a Variety of Halogenated Compounds
Streit, Gerald E.
, p. 2321 - 2324 (2007/10/02)
The flowing afterglow technique has been applied to a comparative study, for a series of halogenated compounds, of dissociative attachment and reaction with O- and O2-.The ion product spectrum produced by reaction with O- and O2- overlaps but is more diverse than that obtained by dissociative attachment.Absolute rate constants for the O- and O2- reactions are reported.A few reactions, for which exothermic mechanisms can be written, were found to be quite inefficient.
