Mesoporous Copper Oxide as a New Combustion Catalyst for Composite Propellants

Fuente, José Luis de la

doi:10.2514/1.b34491

Cited by 23 publications

(12 citation statements)

References 21 publications

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“…2 XRD pattern corresponds to the cubic fluorite structure with intense bands because of the (111), (200), (220), and (311) planes [23], whereas the CuO XRD pattern corresponds to the (002) and (111) planes [8]. The XRD peaks of all the sol-gel catalysts, except for the gel Cu sample, are rather broad, indicating the presence of small crystallites.…”

Section: B X-ray Diffraction Analysismentioning

confidence: 99%

“…Hence, some catalysts are added into the composite to increase the LiClO 4 decomposition rate and optimize its abilities. Transition-metal oxides, such as Fe 2 O 3 , Co 2 O 3 , TiO 2 , MnO 2 , and CuO, increase the decomposition rate of perchlorates [6][7][8][9][10].…”

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confidence: 99%

“…Some researchers [8,11,12] suggested that p-type semiconductors are the only active catalysts for the decomposition of perchlorates. Other researchers, like Cannon and Zhang [13] and Zhang et al [14], considered that metal oxides containing metal cations with half-filled d orbitals probably have high activities.…”

mentioning

confidence: 99%

“…Previous research [8,14,21] explored the catalytic effect of both CeO 2 and CuO on the decomposition of perchlorate. de la Fuente [8] has reported that the mechanism of catalyzed NH 4 ClO 4 thermal decomposition can be understood by an electron transfer process, whereas Chen et al [21] believed that CuO nanorods accelerated the NH 4 ClO 4 high-temperature decomposition by involving a proton transfer on surfaces.…”

mentioning

confidence: 99%

“…de la Fuente [8] has reported that the mechanism of catalyzed NH 4 ClO 4 thermal decomposition can be understood by an electron transfer process, whereas Chen et al [21] believed that CuO nanorods accelerated the NH 4 ClO 4 high-temperature decomposition by involving a proton transfer on surfaces. However, no investigation on the decomposition of perchlorates with CeO 2 -CuO catalysts has been conducted.…”

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confidence: 99%

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Catalyst for Lithium Perchlorate Decomposition

Zhang

Yan

Qiu

et al. 2015

Journal of Propulsion and Power

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The use of metal oxide additives to modify the ability of solid propellants and other energetic materials has been the topic of much study. This work reports the enhancement of the decomposition of lithium perchlorate (LiClO 4 ) by means of employing Ce x Cu 1−x O 1x as a catalyst. The Ce x Cu 1−x O 1x composite catalysts synthesized through the collosol-gelling method with different mole ratios were designed to strongly enhance LiClO 4 decomposition through comparison with blank tests. The synthesized catalysts were characterized by scanning electron microscope, Brunauer-Emmett-Teller, x-ray diffraction, x-ray photoelectron spectra, and H 2 -TPR analyses. Results showed that a solid solution was formed in the Ce x Cu 1−x O 1x catalysts. The Ce x Cu 1−x O 1x composite catalysts showed more lattice defects, smaller crystallites, larger surface area, and more oxygen vacancies than pure CuO and CeO 2 samples because of the interaction of Ce and Cu ions. Lattice defects, especially the reduced surface sites (that is, Ce 3 , Cu , and oxygen vacancies), played dominant roles in catalytic reactions of LiClO 4 decomposition. In addition, a hypothetical mechanism for LiClO 4 catalytic decomposition of the Ce x Cu 1−x O 1x catalyst was proposed.

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Section: B X-ray Diffraction Analysismentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Catalyst for Lithium Perchlorate Decomposition

Zhang

Yan

Qiu

et al. 2015

Journal of Propulsion and Power

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Characterization of Phase Structures of Novel Metallo‐Polyurethanes

Lucio

Fuente

Cerrada

2015

Macro Chemistry & Physics

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Two series of chemically well-defi ned polyurethanes (PUs) have been synthesized containing two different soft segments of interest in aerospace applications. At a given soft fragment, four different hard segments (HSs) based on single diisocyanate molecules with no chain extenders have been incorporated. Both segmented PU series have been prepared by stoichiometric reactions of the macrodiol hydroxyl-terminated polybutadiene (HTPB), and a metallo-derived, this being the (ferrocenylbutyl) dimethylsilane grafted on HTPB, so-called Butacene. Those HSs are isophorone diisocyanate, toluene-2,4-diisocyanate, 4,4′-diphenyl methane diisocyanate, and hexamethylene diisocyanate. Microphase separation and morphology development have been studied at room temperature in these copolymers using Fourier transform infrared spectroscopy, analyzing the change in the relative intensities of free and hydrogen-bonded carbonyl peaks. Measurements of wide-and small-angle X-ray diffraction using synchrotron radiation allow analyzing the morphological and microstructural differences between these two series of samples. In addition, dynamic mechanical analysis and differential scanning calorimetry have been used to learn about the relaxation processes and thermal transitions that are observed in these materials and to confi rm the existence or lack of phase segregation. The knowledge of structure-property relationship is very important in these advanced organometallic PUs to get an understanding of their application as solid composite propellants binder.

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Chromium Copper Catalysts for LiClO₄ Decomposition

Zhang

Yan

Qiu

et al. 2014

Propellants Explo Pyrotec

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Chromium copper (CrCu) catalysts are well‐known burning rate catalysts for solid propellants, which were used as energy source for rocket propulsion [1]. The present work reports the enhancement of lithium perchlorate (LiClO4) by employing copper chromium as a catalyst. The LiClO4 decomposition rate depends on the catalyst characteristics, such as chemical composition, specific surface, and crystalline structure. Scanning electron microscopy, Brunauer‐Emmett‐Teller, X‐ray diffraction, X‐ray photoelectron spectroscopy, and H2‐temperature‐programmed reduction analyses were used to characterize CrxCu(1−x)O(1+0.5x) catalysts. The samples are prepared using the sol‐gel method with different mole ratios. Furthermore, the samples are tested to evaluate their effect on the LiClO4 decomposition at various temperatures. The blank tests comparison shows that the CrxCu(1−x)O(1+0.5x) catalysts strongly enhance the LiClO4 decomposition. Moreover, CuCr2O4 is formed in the CrxCu(1−x)O(1+0.5x) catalysts. The CrCu binary composite catalysts show smaller crystallites, larger surface area, and better catalytic performance than the pure CuO samples because of the interaction of Cr and Cu ions. This study proposes a hypothetical reaction mechanism for the LiClO4 catalytic decomposition of the CrxCu(1−x)O(1+0.5x) catalysts.

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Mesoporous Copper Oxide as a New Combustion Catalyst for Composite Propellants

Cited by 23 publications

References 21 publications

Catalyst for Lithium Perchlorate Decomposition

Catalyst for Lithium Perchlorate Decomposition

Characterization of Phase Structures of Novel Metallo‐Polyurethanes

Chromium Copper Catalysts for LiClO₄ Decomposition

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Mesoporous Copper Oxide as a New Combustion Catalyst for Composite Propellants

Cited by 23 publications

References 21 publications

Catalyst for Lithium Perchlorate Decomposition

Catalyst for Lithium Perchlorate Decomposition

Characterization of Phase Structures of Novel Metallo‐Polyurethanes

Chromium Copper Catalysts for LiClO4 Decomposition

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Product

Resources

About

Chromium Copper Catalysts for LiClO₄ Decomposition