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A method for increasing the amount of hydrogen liberated by sodium borohydride hydrolysis

A technology of sodium borohydride water and sodium borohydride, which is applied in the field of increasing the amount of hydrogen liberated by sodium borohydride hydrolysis, can solve the problems of reduced catalyst area, easy agglomeration of hydrolyzed products, and limited Co-B catalyst performance. The method is simple , Improve the effect of hydrogen release

Inactive Publication Date: 2015-08-19
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to reports, Co-B catalysts show excellent catalytic performance among many catalysts, but the effective catalyst area of ​​Co-B is reduced due to the easy agglomeration of hydrolyzed products, which limits the catalytic performance of Co-B.

Method used

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  • A method for increasing the amount of hydrogen liberated by sodium borohydride hydrolysis
  • A method for increasing the amount of hydrogen liberated by sodium borohydride hydrolysis

Examples

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Effect test

Embodiment 1

[0014] A method for improving the amount of hydrogen released by hydrolysis of sodium borohydride, the steps are as follows: 1) 1.07gNaBH 4 with 0.101g CoCl 2 Add 4g of water, carry out hydrolysis reaction at 25-30°C for 2-5 minutes, then filter to obtain the filter residue, dry the filter residue to obtain the Co-B catalyst, mix 0.004g of Co-B catalyst with 0.01g of CeO 2 Stir evenly with a glass rod in a mortar to obtain a mixed catalyst; 2) Make NaOH and water into a strong alkali solution with a pH value of 12-13, and then hydroborate 0.0178g weighed in a glove box filled with argon Sodium is added to the strong alkali solution and mixed evenly to obtain a sodium borohydride alkaline aqueous solution. The mass fraction of sodium borohydride in the sodium borohydride alkaline aqueous solution is 9%, and finally the mixed catalyst is added to the sodium borohydride alkaline aqueous solution for hydrolysis. hydrogen reaction.

[0015] From figure 1 It can be seen that the ...

Embodiment 2

[0018] A method for improving the amount of hydrogen released by hydrolysis of sodium borohydride, the steps are as follows: 1) 1.07gNaBH 4 with 0.101g CoCl 2 Add 4g of water, carry out hydrolysis reaction at 25-30°C for 2-5 minutes, then filter to obtain the filter residue, dry the filter residue to obtain the Co-B catalyst, mix 0.007g of Co-B catalyst with 0.007g of CeO 2 Stir evenly with a glass rod in a mortar to obtain a mixed catalyst; 2) Make NaOH and water into a strong alkali solution with a pH value of 12-13, and then hydroborate 0.0178g weighed in a glove box filled with argon Sodium is added to the strong alkali solution and mixed evenly to obtain a sodium borohydride alkaline aqueous solution. The mass fraction of sodium borohydride in the sodium borohydride alkaline aqueous solution is 9%, and finally the mixed catalyst is added to the sodium borohydride alkaline aqueous solution for hydrolysis. hydrogen reaction.

[0019] From figure 1 It can be seen that the...

Embodiment 3

[0022] A method for improving the amount of hydrogen released by hydrolysis of sodium borohydride, the steps are as follows: 1) 1.07gNaBH 4 with 0.101g CoCl 2 Add 4g of water, carry out hydrolysis reaction at 25-30°C for 2-5 minutes, then filter to obtain the filter residue, dry the filter residue to obtain the Co-B catalyst, mix 0.01g of Co-B catalyst with 0.004g of CeO 2 Stir evenly with a glass rod in a mortar to obtain a mixed catalyst; 2) Make NaOH and water into a strong alkali solution with a pH value of 12-13, and then hydroborate 0.0178g weighed in a glove box filled with argon Sodium is added to the strong alkali solution and mixed evenly to obtain a sodium borohydride alkaline aqueous solution. The mass fraction of sodium borohydride in the sodium borohydride alkaline aqueous solution is 9%, and finally the mixed catalyst is added to the sodium borohydride alkaline aqueous solution for hydrolysis. hydrogen reaction.

[0023] From figure 1 It can be seen that the ...

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Abstract

The invention provides a method for increasing hydrogen desorption capacity by sodium borohydride through hydrolysis, which is characterized in that a Co-B catalyst and a rare earth oxide are uniformly stirred to obtain a mixture by a glass rod, the mass fraction of the rare earth oxide in the mixture is 25-75%, and then the mixture is added in a sodium borohydride alkaline aqueous solution. According to the invention, the mixture of Co-B catalyst and the rare earth oxide are performed with hydrogen desorption reaction by sodium borohydride through hydrolysis, the method is simple, and the hydrogen desorption capacity is obviously increased.

Description

technical field [0001] The invention belongs to the field of hydrogen storage materials, and in particular relates to a method for increasing the amount of hydrogen released by hydrolysis of sodium borohydride. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is the most in-depth and extensively researched type of fuel cell so far. With the continuous breakthrough of fuel cell power generation technology, the technology of hydrogen production by metal hydride has been developed rapidly. Sodium borohydride (NaBH 4 ) The hydrogen storage capacity of alkaline saturated aqueous solution can reach 7.4%, and NaBH can be converted to 4 and part of H 2 The hydrogen in O is released, showing its unique advantages in hydrogen storage and hydrogen production. At present, the research on hydrogen production by hydrolysis of sodium borohydride mainly focuses on the development of catalysts. According to reports, Co-B catalysts show excellent catalytic performa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/06B01J23/75
CPCY02E60/36
Inventor 郑雪萍刘胜林罗伟华邓娟莉郑姣姣冯鑫肖果刘敏鲁卓睿
Owner CHANGAN UNIV
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