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Porous hydrogen storage material and preparation method thereof

A technology of hydrogen storage materials and rare earth oxides, applied in the field of porous hydrogen storage materials and their preparation, to achieve the effects of fast hydrogen absorption, easy control, and low cost

Inactive Publication Date: 2014-07-16
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these hydrogen storage materials have their own advantages, according to the goals proposed by the U.S. Department of Energy (DOE) that the hydrogen storage capacity is ≥6.5wt%, the decomposition temperature is 60-120°C, low cost and low toxicity, so far, , there is no system that can meet all the requirements. Therefore, further discovery and development of new high-performance hydrogen storage materials is still the current and future research focus

Method used

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  • Porous hydrogen storage material and preparation method thereof
  • Porous hydrogen storage material and preparation method thereof
  • Porous hydrogen storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0023] 1) Dissolve 1g of sodium borohydride (NaBH 4 ) mixed with 3mL of sodium hydroxide aqueous solution with a pH of 13 to make a sodium borohydride solution, and 0.05g of cobalt chloride (CoCl 2 ) fully dissolved in 3mL water to obtain CoCl 2 aqueous solution, the CoCl 2 The aqueous solution is added to the sodium borohydride solution, and then the hydrolysis reaction is carried out at 30°C for 2 minutes. After the hydrolysis reaction is completed, it is filtered, and the filtered residue is dried in the air (drying temperature is 30°C) for 18 hours to obtain Co-B ;2) Combine Co-B with Y 2 o 3 According to the mass ratio of 1:1, stir and mix in a mortar to obtain a mixed catalyst; 3) NaBH 4 Dissolve in NaOH aqueous solution with pH value of 12 to get NaBH 4 Alkaline aqueous solution, NaBH 4 NaBH in alkaline aqueous solution 4 The mass fraction is 9%; 4) according to NaBH 4 NaBH in alkaline aqueous solution 4 content of NaBH 4 With the ratio of 50% of the total mas...

Embodiment 1-2

[0025] with CeO 2 replace Y 2 o 3 , others are identical with embodiment 1-1.

[0026] For embodiment 1-1 and 1-2, from figure 1 a It can be seen that the doped Y 2 o 3 The reversible hydrogen absorption and desorption performance of the porous hydrogen storage material is relatively stable. After three cycles, the reversible hydrogen desorption amount has no obvious attenuation. In addition, according to figure 1 a It can be seen that after the porous hydrogen storage material absorbs hydrogen for 3-5 minutes at room temperature and a hydrogen pressure of 3PMa, and then releases hydrogen in a vacuum at 150°C, the first reversible hydrogen release amount can reach 2.4wt%, indicating that the Porous hydrogen storage materials have excellent reversible hydrogen storage performance and fast hydrogen absorption under relatively mild conditions.

[0027] In addition according to figure 1 b. After hydrogen absorption at room temperature and a hydrogen pressure of 3PMa for 3-5...

Embodiment 2-1

[0031] 1) Dissolve 1.5g of sodium borohydride (NaBH 4 ) mixed with 8mL of sodium hydroxide aqueous solution with a pH of 13 to make a sodium borohydride solution, and 0.1g of cobalt chloride (CoCl 2 ) fully dissolved in 5mL water to obtain CoCl2 aqueous solution, the CoCl 2 The aqueous solution is added to the sodium borohydride solution, and then the hydrolysis reaction is carried out at 25°C for 3 minutes. After the hydrolysis reaction is completed, it is filtered, and the filtered residue is dried in the air (drying temperature is 25°C) for 12 hours to obtain Co-B ;2) Combine Co-B with Y 2 o 3 Stir and mix in a mortar at a mass ratio of 1:1.5 to obtain a mixed catalyst; 3) NaBH 4 Dissolve in NaOH aqueous solution with pH 12.5 to get NaBH 4 Alkaline aqueous solution, NaBH 4 NaBH in alkaline aqueous solution 4 The mass fraction is 9%; 4) according to NaBH 4 NaBH in alkaline aqueous solution 4 content of NaBH 4 With the ratio of 55% of the total mass of the mixed cata...

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Abstract

The invention provides a porous hydrogen storage material and a preparation method thereof. The porous hydrogen storage material comprises an amorphous phase and rare earth oxide, wherein the mass fraction of the rare earth oxide in the hydrogen storage material is 1-20 percent, and the amorphous phase is formed by hydrolyzing NaBH4 to release hydrogen and drying. The porous hydrogen storage material provided by the invention comprises the amorphous phase and the rare earth oxide, has a microstructure being a sheet porous structure, has the characteristics of large hydrogen storage amount, gentle conditions for absorbing and releasing hydrogen, high hydrogen absorbing speed and the like, and is suitable for efficient storage and safe transportation of hydrogen. The preparation method of the porous hydrogen storage material provided by the invention is simple in process and is easy to control; in addition, materials are from the products of hydrolysis of sodium borohydride, and the cost is low.

Description

technical field [0001] The invention belongs to the field of hydrogen storage material HPSB (Hydrolysis Production of Sodium Borohydride), in particular to a porous hydrogen storage material and a preparation method thereof. Background technique [0002] With the development of society and the growth of population, the demand for energy is increasing. Fossil energy represented by coal, oil, and natural gas is a non-renewable resource, and the extensive use of petrochemical energy has caused increasingly serious environmental pollution problems. Hydrogen energy, as a high energy density, clean green new energy, has attracted extensive research. However, due to the lack of convenient and effective hydrogen storage materials and hydrogen storage technology, the application of hydrogen energy has been greatly hindered for a long time. There are many types of hydrogen storage materials currently being studied, mainly including hydrogen storage alloys, coordination hydrides, ami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/06B01J23/83
CPCY02E60/36
Inventor 郑雪萍刘胜林罗伟华温久然刘敏鲁卓睿
Owner CHANGAN UNIV
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