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Preparation method of magnesium-based hydrogen storage composite material

A composite material and hydrogen storage technology, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve the problems of high hydrogen desorption temperature, slow hydrogen absorption and desorption rate, easy formation of dense oxide films, etc., and achieve a simple preparation method. , the effect of reducing energy barrier and improving hydrogen absorption/desorption performance

Active Publication Date: 2021-11-26
HEBEI UNIV OF ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its disadvantages such as slow hydrogen absorption and desorption rate, high hydrogen desorption temperature (400°C), and easy formation of dense oxide films on the surface limit its practical application.

Method used

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  • Preparation method of magnesium-based hydrogen storage composite material
  • Preparation method of magnesium-based hydrogen storage composite material
  • Preparation method of magnesium-based hydrogen storage composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1 A kind of MgH 2 -Ce 0.8 co 0.1 Zr 0.1 o 2 Preparation method of composite material

[0044] This embodiment is a kind of MgH 2 -Ce 0.8 co 0.1 Zr 0.1 o 2 The preparation method of the composite material is prepared according to the following sequence of steps:

[0045] (1) MgH 2 material preparation

[0046] Take a certain amount of Mg powder and place it in a hydrogenation tube, react at 400°C and 4Mpa hydrogen pressure to prepare MgH 2 Material;

[0047] (2) Preparation of additives

[0048] (21) Dissolve cerium nitrate hexahydrate in methanol and water mixed solvent (volume ratio of methanol and water is 7:3), after ultrasonic mixing, the solution is recorded as A;

[0049] (22) Dissolving zirconium oxychloride in ethylene glycol and water mixed solvent (the volume ratio of ethylene glycol and water is 4:1), after ultrasonic mixing, the solution is recorded as B;

[0050] (23) Cobalt nitrate hexahydrate was dissolved in deionized water, and...

Embodiment 2-4

[0057] Embodiment 2-4 A kind of preparation method of magnesium-based hydrogen storage composite material

[0058] In this example, magnesium-based hydrogen storage composite materials were prepared respectively, and the preparation method was similar to that of Example 1, the only difference being that the corresponding technical parameters in the preparation process were different, see the following table for details:

[0059]

Embodiment 5

[0060] Performance test of embodiment 5 magnesium-based hydrogen storage composite material

[0061] This embodiment carries out performance test to the composite material prepared in embodiment 1-4, wherein figure 1 and figure 2 Be the sample Ce prepared by the present invention respectively 0.8 co 0.1 Zr 0.1 o 2 XRD patterns and Ce 0.8 mn 0.1 Zr 0.1 o 2 The XRD pattern of the sample, it can be seen from the figure that the synthesized sample Ce 0.8 co 0.1 Zr 0.1 o 2 and Ce 0.8 mn 0.1 Zr 0.1 o 2 The XRD curve of the sample is significantly shifted compared with the standard card (PDF#34-0394), indicating that Mn / Co and Zr have entered CeO 2 Inside, a solid solution is formed.

[0062] From Figure 3 to Figure 6 It can be seen that, using the solid solution material obtained by the method of the present invention as a catalyst can significantly improve the MgH 2 The hydrogen absorption and desorption rate and thermodynamic performance. MgH 2 -Ce 0.8 mn ...

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Abstract

The invention discloses a preparation method of a magnesium-based hydrogen storage composite material. The magnesium-based hydrogen storage composite material is prepared sequentially through preparation of an MgH2 material, preparation of an additive and ball milling of the composite material. The magnesium-based hydrogen storage composite material is prepared by preparing a solid solution Ce<0.8>Co<0.1>Zr<0.1>O2 or Ce<0.8>Mn<0.1>Zr<0.1>O2 sample and adding the solid solution Ce<0.8>Co<0.1>Zr<0.1>O2 or Ce<0.8>Mn<0.1>Zr<0.1>O2 sample into MgH2, and performing ball milling. The preparation method is simple, and the process is easy to control Compared with MgH2, the material has the advantages that the hydrogen absorption / desorption rate and the hydrogen storage capacity are greatly improved, and the material has better dynamic performance. The method is suitable for preparing the magnesium-based hydrogen storage composite material.

Description

technical field [0001] The invention belongs to the field of hydrogen storage material preparation, and in particular relates to a preparation method of a magnesium-based hydrogen storage alloy composite material. Background technique [0002] The burning of fossil fuels and the emission of greenhouse gases have caused huge pollution to the environment, and it is imminent to seek clean and pollution-free new energy sources to replace traditional energy materials. Due to the advantages of abundant resources, high energy density, and environmental protection and non-pollution, hydrogen energy has attracted the attention of governments around the world. The effective development and utilization of hydrogen energy needs to solve three key problems of hydrogen production, storage, transportation, and application. Due to the characteristics of hydrogen being extremely ignitable and explosive, the storage and transportation of hydrogen has become the core issue in the development a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/00
CPCC01B3/0078Y02E60/32
Inventor 程颖石碧清董冰纪献兵李思琪梁赟
Owner HEBEI UNIV OF ENVIRONMENTAL ENG
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