A method for modifying three-dimensional graphene-confined high-capacity hydrogen storage materials with iron-based catalysts

A technology of iron-based catalysts and hydrogen storage materials, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve problems that have not been seen, and achieve the effect of simple method, increased loading area, and good catalytic performance

Active Publication Date: 2019-10-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to literature research, there is no report of iron-based catalysts modifying three-dimensional graphene confinement high-capacity hydrogen storage materials

Method used

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  • A method for modifying three-dimensional graphene-confined high-capacity hydrogen storage materials with iron-based catalysts
  • A method for modifying three-dimensional graphene-confined high-capacity hydrogen storage materials with iron-based catalysts
  • A method for modifying three-dimensional graphene-confined high-capacity hydrogen storage materials with iron-based catalysts

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh Fe(NO 3 ) 3 9H 2 The powder of O and polyvinylpyrrolidone with a mass ratio of 1:1 is dissolved in deionized water to form a mixed solution, which is kept in a blast drying oven at 75°C for 3 hours until it is completely dry, and then the dried product is ground into a powder. The powder was transferred to a tube furnace in a nitrogen atmosphere at 700 °C for 2 h to obtain a three-dimensional graphene composite material modified with iron carbide catalyst, and 0.015 mg of iron carbide catalyst modified three-dimensional graphene and 0.002 mg of dibutyl magnesium were dissolved in heptane and ring In the hexane mixed solution, the reaction was carried out at 200°C under the hydrogen pressure of 3MPa, and the reaction time was kept at 24h. After centrifugal vacuum drying, the iron carbide catalyst modified three-dimensional graphene and MgH 2 Composite hydrogen storage materials.

Embodiment 2

[0026] Weigh Fe(NO 3 ) 3 9H 2 O and polyvinylpyrrolidone mass ratio of 0.8:1 powder is dissolved in deionized water to make a mixed solution, kept in a blast drying oven at 75 ° C for 3 hours until completely dry, and then the dried product is ground into a powder. The powder was transferred to a tube furnace in a nitrogen atmosphere at 750°C for 1.5 h to obtain a three-dimensional graphene composite material modified with iron carbide catalyst, and 0.02 mg of iron carbide catalyst modified three-dimensional graphene and 0.003 mg of dibutyl magnesium were dissolved in heptane and In the cyclohexane mixed solution, the reaction was carried out at 200°C under the hydrogen pressure of 2.5MPa, and the reaction time was kept at 20h. After centrifugal vacuum drying, the iron carbide catalyst modified three-dimensional graphene and MgH 2 Composite hydrogen storage materials.

Embodiment 3

[0028] Weigh Fe(NO 3 ) 3 9H 2 O and polyvinylpyrrolidone mass ratio of 1.2:1 powder is dissolved in deionized water to make a mixed solution, kept in a blast drying oven at 75 ° C for 3 hours until completely dry, and then the dried product is ground into a powder. The powder was transferred to a tube furnace in a nitrogen atmosphere at 700°C for 2 hours to obtain an iron carbide catalyst-modified three-dimensional graphene composite material, and the iron carbide catalyst-modified three-dimensional graphene composite material was immersed in the dissolved LiBH 4 In tetrahydrofuran (THF) solution, ultrasonically stirred for 30min, vacuum-dried at room temperature, and then slowly heated to 150°C to remove the solvent to obtain three-dimensional graphene-confined LiBH modified with iron carbide catalyst 4 high-capacity hydrogen storage materials.

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Abstract

The invention provides a method for modifying a three-dimensional graphene confinement high-volume hydrogen-storage material by an iron-based catalyst. The method comprises the following steps: respectively dissolving ferric nitrate or partial other metal-added nitrate and polyvinylpyrrolidone in deionized water to prepare a mixed solution, placing the mixed solution in an air-blast drying box forcomplete drying, grinding the material to powder, and transferring the ground powder to a tubular furnace for primary pre-burning or secondary heat treatment to obtain a black foamed product which isthe iron-based catalyst modified three-dimensional graphene confinement high-volume hydrogen-storage material; and compositing the iron-based catalyst modified three-dimensional graphene and a hydrogen-storage alloy to obtain the modified three-dimensional grapheme confinement high-volume hydrogen-storage material. A series of the iron-based catalyst modified three-dimensional graphene confinement high-volume hydrogen-storage materials can be prepared by controlling the reaction conditions, the method is novel, the production period is short, the cost is low, and the hydrogen-storage materialhas the advantages of strong repeatability and large-scale preparation, and has good industrial prospect on the field of hydrogen storage.

Description

technical field [0001] The invention belongs to the field of functional nanometer materials, and in particular relates to a large-scale preparation method of a high-capacity hydrogen storage material modified by an iron-based catalyst to modify three-dimensional graphene confinement. Background technique [0002] Hydrogen energy is considered to be one of the most promising clean energy sources to replace traditional fossil fuels in this century because of its high combustion calorific value, low-carbon environmental protection, and abundant resources. In the development of hydrogen energy economy, hydrogen storage technology is one of the main factors restricting its commercialization, and solid hydrogen storage materials are expected to solve this problem. According to the requirements of the International Energy Association for future hydrogen storage materials, high hydrogen storage capacity and mild hydrogen absorption and desorption temperature are the prerequisites fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/02
CPCC01B3/0078C01P2002/72C01P2004/04C01P2004/80Y02E60/32
Inventor 李平刘志伟韩坤赵汪刘春荣路新曲选辉
Owner UNIV OF SCI & TECH BEIJING
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