Nano composite hydrogen storage material and preparation method thereof

A hydrogen storage material and nano-composite technology, applied in chemical instruments and methods, metal material coating technology, hydrogen, etc., can solve the problems of unsuitable commercial practical conditions, unfavorable portability, difficult control, etc., and achieve the potential of improving commercial application , reliable synthesis method, high mechanical performance effect

Active Publication Date: 2019-08-09
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] (1) The hydrogen storage rate of pure one-dimensional carbon nanotubes or two-dimensional materials is lower than 5wt%, which does not meet the conditions for commercialization (the commercial standard in the United States is >6wt%)
[0009] (2) Traditional metal hydrides store hydrogen, the hydrogen storage density is not high, and the mass is relatively large, which is not conducive to carrying
[0010] (3) Traditional hydrogen storage materials require special hydrogen storage conditions such as high temperature and high pressure, which consume energy and are dangerous
[0011] (4) Traditional hydrogen storage materials are prone to aging and the storage and release of hydrogen are difficult to control, which is not conducive to use

Method used

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  • Nano composite hydrogen storage material and preparation method thereof
  • Nano composite hydrogen storage material and preparation method thereof
  • Nano composite hydrogen storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1 h-BN / CNT-30-1 (h-BN / CNT-X-Y, where X represents the chemical vapor deposition time, Y represents the Ni / h-BN mass ratio:

[0047] (1) Preparation of functionalized two-dimensional hexagonal boron nitride powder: put two-dimensional hexagonal boron nitride powder into concentrated HNO 3 In the solution, reflux at 140° C. for 8 hours, cool to room temperature, wash with deionized water until neutral and dry to obtain functionalized two-dimensional hexagonal boron nitride nanosheets.

[0048] (2) Preparation of functionalized two-dimensional hexagonal boron nitride supported nickel catalyst: 0.5 g functionalized two-dimensional hexagonal boron nitride nanosheet and 2.4661 g Ni(NO 3 ) 2 ·6H 2 O (the mass ratio of nickel to two-dimensional hexagonal boron nitride is 1:1) was added to 35mL of acetone reagent, ultrasonically mixed and then dried; the dried powder was calcined in an argon atmosphere at 450°C for 4h , and then reduced in a hydrogen atmosphere at 460...

Embodiment 2

[0054] Example 2 h-BN / CNT-15-1

[0055] (1) Compared with Example 1 in this example, only the vapor deposition time is changed to 15 minutes.

[0056] Figure 6 For h-BN / CNT-15-1, with Figure 5 h-BN / CNT-30-1 is significantly shorter than carbon nanotubes.

[0057] The h-BN / CNT-15-1 prepared in this example reaches saturated hydrogen absorption within 20 minutes, reaches the maximum hydrogen absorption of 8.3wt% at 300K, and releases 7.9wt% of hydrogen within 30 minutes at 500K.

Embodiment 3

[0058] Example 3 h-BN / CNT-30-3

[0059] (1) Compared with Example 1, this example only changes the mass ratio of nickel to two-dimensional hexagonal boron nitride, and Ni(NO 3 ) 2 ·6H 2 The amount of O was changed to 7.3983g (the mass ratio of nickel to two-dimensional hexagonal boron nitride was 3:1).

[0060] Figure 7 For h-BN / CNT-30-3, with Figure 5 The forest of h-BN / CNT-30-1 is obviously denser than that of CNT.

[0061] The h-BN / CNT-30-3 prepared in this example reaches saturated hydrogen absorption within 20 minutes, reaches the maximum hydrogen absorption of 11wt% at 300K, and releases 10.7wt% of hydrogen within 30 minutes at 500K.

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Abstract

The invention provides a nano composite hydrogen storage material and a preparation method thereof, and particularly relates to a two-dimensional hexagonal boron nitride nano composite hydrogen storage material loaded with a metal catalyst and with carbon nano tubes as a framework structure and a preparation method of the hydrogen storage material. The synthesis method of the hydrogen storage material comprises the steps that 1, a two-dimensional hexagonal boron nitride nano sheet is prepared; 2, the two-dimensional hexagonal boron nitride nano sheet is loaded with the metal catalyst; 3, the carbon nano tubes are grown on the two-dimensional hexagonal boron nitride nano sheet loaded with the catalyst by applying a vapor deposition method. The nano composite hydrogen storage material obtained by means of the method effectively combines capillary hydrogen storage and surface adsorption hydrogen storage, is of a novel low-dimensional high-efficiency hydrogen storage structure and can be small in size, low in weight, safe and high in hydrogen storage density, the highest hydrogen storage rate can reach 8-11 wt%, the nano composite hydrogen storage material has high mechanical properties, a high specific surface area and large system pores, the synthesis method is reliable and suitable for large-scale production, the application and popularization of hydrogen energy sources are facilitated, and therefore the problems of greenhouse effect, environmental deterioration and the like are effectively solved.

Description

technical field [0001] The invention relates to a nanocomposite hydrogen storage material and a preparation method thereof, in particular to a two-dimensional boron nitride hydrogen storage material with carbon nanotubes as a skeleton structure and a preparation method thereof. Background technique [0002] Hydrogen energy has been recognized as the cleanest, low-carbon and environmentally friendly energy in the 21st century. Due to the rich content of hydrogen in the earth's water resources, and the high combustion heat of hydrogen and the pollution-free reaction products and many other advantages, it has attracted more and more attention from new energy development workers in various countries and regions around the world. However, existing conventional technology methods cannot safely store and transport hydrogen to meet future demand. Therefore, storing hydrogen in a small, light, portable and safe hydrogen storage material and realizing efficient storage and release of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/00B22F1/02C23C16/26C23C18/32
CPCC01B3/0078C23C16/26C23C18/32B22F1/17Y02E60/32
Inventor 施建章王梦华郝瑞瑞任盼陈奕凯
Owner XIDIAN UNIV
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