CHINESE JOURNAL OF ENERGETIC MATERIALS
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Preparation of Porous Core-shell Structural Ni@C Nanorods and Their Catalytic Properties for Thermal Decomposition of Ammonium Perchlorate
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1.Xi′an Modern Chemistry Research Institute, Xi′an 710065, China;2.National Special Superfine Powder Engineering Research Center of China, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

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    Abstract:

    To enhance the catalytic effect of nano-sized metals for the thermal decomposition of ammonium perchlorate (AP), Ni@C nanorods were prepared by combining solvothermal method and high-temperature calcining process using nickel-based metal-organic frameworks (Ni-MOFs) as precursor. The morphology, structure and composition of Ni@C nanorods were characterized by X-ray diffractometer (XRD), field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectrometer (XPS), Raman spectrometer, full-automatic physical adsorption analyzer and so on. The catalytic effect of Ni@C nanorods on the thermal decomposition of AP at different calcination temperatures was studied by differential scanning calorimeter (DSC). Results show that Ni@C nanorods are porous core-shell structures with metal Ni as core and graphitized C layer as shell, and highly graphitized C layer effectively prevents the oxidation of nano-Ni particles. Ni@C nanorods possess more superior catalytic performances on the thermal decomposition of AP than single Ni nanoparticles and C nanorods. In particular, Ni@C nanorods calcined at 1000 ℃ make the peak temperature of high-temperature decomposition of AP reduce from 423.4 ℃ to 323.8 ℃, the apparent heat of decomposition increase from 825.4 J·g-1 to 1423.8 J·g-1, and the activation energy of reaction decrease from 172.50 kJ·mol-1 to 130.04 kJ·mol-1.

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李丽,柯香,安亭,等.多孔核壳结构Ni@C纳米棒的制备及其对高氯酸铵热分解催化性能的影响[J].含能材料,2019,27(10):867-874.
LI Li, KE Xiang, AN Ting, et al. Preparation of Porous Core-shell Structural Ni@C Nanorods and Their Catalytic Properties for Thermal Decomposition of Ammonium Perchlorate[J]. Chinese Journal of Energetic Materials,2019,27(10):867-874.

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History
  • Received:December 18,2018
  • Revised:April 02,2019
  • Adopted:January 31,2019
  • Online: March 22,2019
  • Published: October 25,2019