Catalyst for catalyzing hydrolysis of ammonia borane to produce hydrogen as well as preparation method and application of catalyst

A hydrolysis hydrogen production and catalyst technology, applied in the field of hydrogen storage materials, can solve the problems of high cost and low catalytic activity, and achieve the effects of easy operation, reduced synthesis cost, and simple and convenient implementation

Active Publication Date: 2021-10-22
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the existing problems of high cost and low catalytic activity of the existing ammonia borane hydrolysis reaction catalyst materials, the invention provides a low-cost, high-activity catalyst for catalyzing the hydrolysis of ammonia borane to produce hydrogen and a preparation method thereof and application

Method used

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  • Catalyst for catalyzing hydrolysis of ammonia borane to produce hydrogen as well as preparation method and application of catalyst
  • Catalyst for catalyzing hydrolysis of ammonia borane to produce hydrogen as well as preparation method and application of catalyst
  • Catalyst for catalyzing hydrolysis of ammonia borane to produce hydrogen as well as preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Polyhedral doped P-Cu-Co with different phosphorus content 3 o 4 Preparation of @C catalyst.

[0036] (1) Weigh 0.87 g Co(NO 3 ) 2 ·6H 2 O and 0.26 gCu(acac) 2 Add 40 mL of anhydrous methanol, stir to dissolve until a light red clear solution is obtained; weigh 1.31 g of 2-methylimidazole and dissolve it in 40 mL of anhydrous methanol to obtain a colorless and clear solution, stir and disperse for 30 minutes, and dissolve 2-methylimidazole The methanol solution of imidazole was quickly poured into Co(NO 3 ) 2 ·6H 2 O and Cu(acac) 2 In the methanol solution, keep the stirring condition unchanged, after stirring for 24 h, Cu(acac) 2 @ZIF-67 purple precursor solution. Cu(acac) 2 The @ZIF-67 precursor solution was centrifuged at a speed of 10000r / min, and washed with anhydrous methanol. After repeated centrifugation and washing four times, the collected purple solid was vacuum-dried at 50°C for 12h to obtain Cu( acac) 2 @ZIF-67.

[0037] (2) Weigh 150mg Cu(aca...

Embodiment 2

[0040] Polyhedral doped P-Cu-Co with different phosphorus content 3 o 4 Preparation of @C catalyst.

[0041] The difference with Example 1 is only to change the quality of sodium hypophosphite in step (2) to 70 mg or 210 mg, and the samples are recorded as P1-Cu-Co 3 o 4 @C、P3-Cu-Co 3 o 4 @C.

Embodiment 3

[0043] Comparative polyhedral Cu-Co 3 o 4 Preparation of @C catalyst.

[0044] The difference from Example 1 is only that the sintering process of the sample and sodium hypophosphite in the step (2) is removed.

[0045] Cu-Co prepared in this embodiment 3 o 4 @C Catalyst XRD as figure 1 Shown, Cu-Co 3 o 4 The main phase of @C material is Co 3 o 4 phase, indicating that Cu was successfully doped into Co 3 o 4 middle.

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Abstract

The invention belongs to the technical field of hydrogen storage materials, and particularly relates to a catalyst for catalyzing hydrolysis of ammonia borane to produce hydrogen as well as a preparation method and application of the catalyst. The phosphorus-and-copper co-doped cobalt oxide composite material catalyst is prepared by taking a ZIF-67 zeolite imidazate framework structure material as a precursor and performing carbonization doping with Cu and P elements, wherein active components are Cu, Co, O and P elements, and the catalyst is marked as P-Cu-Co3O4@C. The catalyst shows excellent catalytic activity in the reaction of hydrogen production through hydrolysis of ammonia borane, catalytic activity can reach 111.06 mol H2.mol<-1> cat. min<-1 >, apparent activation energy is 38.31 kJ/mol, and 68% of catalytic activity is kept after five times of cyclic catalytic reaction. The catalyst is simple in preparation process and low in cost, raw materials are easy to obtain, and the catalyst has wide application prospects. Meanwhile, the anion-cation co-doping method also provides a new thought for design and synthesis of the high-performance catalyst.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, and in particular relates to a phosphorus-copper co-doped cobalt oxide composite catalyst, a preparation method thereof, and an application in hydrogen production by catalyzing the hydrolysis of ammonia borane. Background technique [0002] Nowadays, with the excessive development and use of traditional fossil energy, it has caused a series of energy crises and also caused a series of environmental problems, such as acid rain, greenhouse effect, air pollution and so on. Finding and developing a renewable green and clean energy to replace traditional energy has become the top priority of whether the future society can achieve sustainable development. Due to its advantages of wide sources, high energy density, and environmental friendliness, hydrogen energy is considered to be the next generation of green energy available, and has attracted much attention from researchers. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J37/08B01J37/28C01B3/06
CPCB01J37/084B01J37/086B01J37/28B01J23/75C01B3/06C01B3/001C01B2203/1052Y02E60/32Y02E60/36
Inventor 余学斌袁重阳
Owner FUDAN UNIV
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