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A kind of catalyst preparation method of zif-8 material supporting COB

A ZIF-8, catalyst technology, applied in the field of catalyst preparation of ZIF-8 material supported CoB, can solve the problems of high cost of precious metals, limited reserves, difficult to meet large-scale applications, etc., to reduce the reaction activation energy, improve the degree of dispersion and The effect of fixing strength and accelerating the rate of hydrogen production by hydrolysis

Inactive Publication Date: 2017-12-05
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high cost and limited reserves of noble metals, it is difficult to meet large-scale applications, and non-noble metals can also have excellent performance, so the current research mainly focuses on non-noble metal catalysts

Method used

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  • A kind of catalyst preparation method of zif-8 material supporting COB
  • A kind of catalyst preparation method of zif-8 material supporting COB
  • A kind of catalyst preparation method of zif-8 material supporting COB

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Experimental program
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Effect test

Embodiment 1

[0032] First weigh 0.5471g cobalt nitrate hexahydrate [Co(NO 3 ) 2 ·6H 2 O] and 0.5593g zinc nitrate hexahydrate [Zn(NO 3 ) 2 ·6H 2 O] Dissolve in 30mL N,N-2 methylformamide (DMF); Weigh 3.087g 2-methylimidazole and dissolve in 30mL DMF; Sonicate both for 5 minutes, then pour the former solution into the latter solution , the mixed solution was stirred at room temperature for 30 minutes on a magnetic stirrer. Then transfer the mixed solution to a 100mL reaction kettle, put it in a blast drying oven at 140°C for 72h, cool, filter with suction, wash, and dry to obtain the ZIF-8 / ZIF-67 hybrid material. Then weigh 0.6232g of sodium borohydride and dissolve it in a mixed solution of 15mL of absolute ethanol and 15mL of deionized water, and add the resulting mixed solution dropwise to 1g of the ZIF-based material through a syringe pump. 30 minutes, followed by suction filtration and washing with deionized water three times, the resulting precipitate was placed in a vacuum oven...

Embodiment 2

[0034] First weigh 0.0274g cobalt nitrate hexahydrate [Co(NO 3 ) 2 ·6H 2 O] and 0.5593g zinc nitrate hexahydrate [Zn(NO 3 ) 2 ·6H 2 O] Dissolve in 30mL N,N-2 methylformamide (DMF); weigh 1.6207g 2-methylimidazole and dissolve in 30mL DMF; ultrasonicate both for 5 minutes, then pour the former solution into the latter solution , the mixed solution was stirred at room temperature for 30 minutes on a magnetic stirrer. Then transfer the mixed solution to a 100mL reaction kettle, put it in a blast drying oven at 140°C for 72h, cool, filter with suction, wash, and dry to obtain the ZIF-8 / ZIF-67 hybrid material. Then weigh 0.6232g of sodium borohydride and dissolve it in a mixed solution of 15mL of absolute ethanol and 15mL of deionized water, and add the resulting mixed solution dropwise to 1g of the ZIF-based material through a syringe pump. 30 minutes, followed by suction filtration and washing with deionized water three times, the resulting precipitate was placed in a vacuu...

Embodiment 3

[0036] First weigh 0.0547g cobalt nitrate hexahydrate [Co(NO 3 ) 2 ·6H 2 O] and 0.5593g zinc nitrate hexahydrate [Zn(NO 3 ) 2·6H 2 O] Dissolve in 30mL N,N-2 methylformamide (DMF); weigh 1.6979g 2-methylimidazole and dissolve in 30mL DMF; ultrasonicate both for 5 minutes, then pour the former solution into the latter solution , the mixed solution was stirred at room temperature for 30 minutes on a magnetic stirrer. Then transfer the mixed solution to a 100mL reaction kettle, put it in a blast drying oven at 140°C for 72h, cool, filter with suction, wash, and dry to obtain the ZIF-8 / ZIF-67 hybrid material. Then weigh 0.6232g of sodium borohydride and dissolve it in a mixed solution of 15mL of absolute ethanol and 15mL of deionized water, and add the obtained mixed solution dropwise to 1g of the ZIF-based material through a syringe pump. 30 minutes, followed by suction filtration and washing with deionized water three times, the resulting precipitate was placed in a vacuum ...

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Abstract

The invention belongs to the field of catalytic hydrogen preparation, and particularly relates to a preparation method of a catalyst with a ZIF-8 material loading CoB. The preparation method comprises the following steps: (1) preparing a ZIF-8 / ZIF-67 hybrid material from cobalt salt, zinc salt, 2-methylimidazole and the like; (2) preparing a solution with a reducing agent, thus obtaining a solution A; (3) slowly injecting an excessive amount of solution A into the ZIF-8 / ZIF-67 hybrid material, and stirring, thus obtaining a suspension B; (4) stewing the solution B for a period of time to further reduce the suspension B, and obtaining a suspension C; (5) performing suction filtration and washing on the suspension C, and drying the suspension C in vacuum, thus obtaining the catalyst with the ZIF-8 material carrying CoB; and (6) applying the catalyst with the ZIF-8 material loading CoB in catalyzing hydrolysis reaction of sodium borohydride. The preparation method disclosed by the invention is low in investment cost; the catalyst is long in service life and larger in surface area; the rate of generating hydrogen by hydrolysis of sodium borohydride can be obviously accelerated, and the reaction activation energy can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of catalytic hydrogen production, and in particular relates to a catalyst preparation method of ZIF-8 material supporting CoB. Background technique [0002] Human beings are facing an unprecedented energy crisis due to the limited reserves of fossil fuels, and their combustion products are emitted into the atmosphere to accelerate the greenhouse effect. Facing these problems, human beings urgently need to find an alternative new energy source. As a renewable green energy, hydrogen energy has attracted great attention, and the efficient utilization of hydrogen energy has become a research hotspot, among which the use of hydrogen as a fuel has obvious advantages. However, it is still a challenge to find a safe, convenient and practical hydrogen storage technology. [0003] NaBH 4 High hydrogen storage density, with a hydrogen content of 10.6%, about 5 times that of conventional metal cyanides, and NaBH 4 No harmful ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28C01B3/06
CPCB01J31/28C01B3/065C01B2203/1052C01B2203/1082Y02E60/36
Inventor 李其明梁志花李芳赵士夺
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY