Enhanced Thermal Decomposition Properties and Catalytic Mechanism of Ammonium Perchlorate over CuO/MoS₂ Composite

Abstract

In this report, CuO/MoS2 composites were successfully prepared by the hydrothermal method where nano‐sized CuO was uniformly distributed on the surface of hierarchical MoS2 substrates (CuO/MoS2 composites). Their physicochemical properties and catalytic performance in ammonium perchlorate (AP) decomposition were investigated and characterized by XRD, SEM, TEM, BET, XPS, TG/DSC and combustion measurement. The results showed that it could decrease AP decomposition temperature at high decomposition stage from 416.5 °C to 323.5 °C and increase the heat release from 378 J/g (pure AP) to 1340 J/g (AP with catalysts), which was better than pure CuO nanoparticles (345.5 °C and 1046 J/g). Meanwhile, it showed excellent performance in combustion reaction either in N2 or air atmosphere. The results obtained by photocurrent spectra, photoluminescence spectra and time‐resolved fluorescence emission spectra indicated that loading CuO mediated the generation rate and combination rate of electrons and holes, thus tuning the catalytic performance on AP decomposition. This study proved that employing the supports that can synergistically interact with CuO is an efficient strategy to enhance the catalytic performance of CuO.

Photoelectrochemical Water‐Splitting Using CuO‐Based Electrodes for Hydrogen Production: A Review

“…Hu et al. [ 350 ] proposed a generally hydrothermal method (see Figure a) for preparing CuO/MoS 2 composites. The obtained SEM and TEM in Figure 13b–d shows the wrinkles on the outer layer of MoS 2 structure and distribution of CuO nanoparticles on the surface of MoS 2 .…”

New Insights into the Catalytic Decomposition of Ammonium Perchlorate and Decomposition Mechanism by Nano‐CuO Dispersed in Graphite‐Carbon Nitride Nanosheet Composites

“…The multielectron carrier could provide accelerated electrons and n-CuO could be receptive to the electrons of AP decomposition product ions and their intermediates, which might further enhance the efficiency of AP pyrolysis through synergistic effects. [19][20][21][22][23][24] For instance, graphene (G)/CuO composite exhibited high catalytic decomposition performance significantly reducing the HTD value of AP from 432 to 325 °C and decreasing the activation energy (E a ) by 57.53 kJ/mol. [25] It was shown that adding CuO/MoS 2 composites to AP could reduce the HTD value by 93 °C and enhance the whole heat release by 962 J/g.…”

“…[25] It was shown that adding CuO/MoS 2 composites to AP could reduce the HTD value by 93 °C and enhance the whole heat release by 962 J/g. [19] In addition, the maximum pyrolysis temperature of AP was reduced by 78.8 °C by adding 2 wt % MXene/CuO nanocomposite to the pure AP. [15] Theoretical studies showed that the pyrolysis process in AP was governed by two steps, including the electron transfer from ClO 4…”

A novel nanomagnetic solid acid catalyst for the synthesis of new functionalized bis‐coumarin derivatives under microwave irradiations in green conditions

“…Moreover, nanostructure supports are advantageous because they show higher reactivity and chemoselectivity than their corresponding bulk materials 56–62 . Moreover, surface modification of magnetic nanoparticles is an allowable method to eliminate the giant gap between homogeneous and heterogeneous catalysts 63–67 . Sulfuric acid is used as an efficient and irretrievable Brønsted–Lowry acid catalyst to generate different kinds of chemical materials 68–71 .…”