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Co-b amorphous alloy porous microsphere catalyst for ammonia boranol to explain hydrogen and preparation method thereof

A technology of amorphous alloys and porous microspheres, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of high application cost and achieve low cost , reduced preparation cost, and facilitated rapid separation and recovery

Inactive Publication Date: 2019-04-02
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the help of an appropriate catalyst, the hydrolysis hydrogen process of AB is relatively mild, and the hydrogen release rate is fast, but the by-product NH 4 BO 2 There is no feasible regeneration path, so the application cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing a Co-B amorphous alloy porous microsphere catalyst for ammonia boranol to explain hydrogen, comprising the following steps:

[0025] Step 1: At room temperature, dissolve 10g of polyvinylpyrrolidone (PVP) into 100mL of water, ultrasonically treat for 30min, fully dissolve, then add 0.05mol of cobalt acetate, continue ultrasonically until completely dissolved, and obtain a transparent cobalt salt solution;

[0026] Step 2: Add to 100mL with a concentration of 0.05 mol·L in an ice-water bath -1 Add 0.001mol of cetyltrimethylammonium bromide to the ethylenediamine aqueous solution, ultrasonically disperse for 30min, fully dissolve, and then add 0.05mol of NaBH 4 Solid, continue to sonicate until completely dissolved to get NaBH 4 Alkaline solution, keep away from light;

[0027] Step 3: According to n(Co 2+ ) / n(BH 4 - ) = 0.18, respectively pipette 15mL of cobalt salt solution and 85mL of basic NaBH 4 solution, under nitrogen protection, NaBH a...

Embodiment 2

[0031] A method for preparing a Co-B amorphous alloy porous microsphere catalyst for ammonia boranol to explain hydrogen, comprising the following steps:

[0032] Step 1: Dissolve 20g of PVP into 100mL of water at room temperature, sonicate for 30 minutes, fully dissolve, then add 0.1mol of cobalt chloride, continue sonicating until completely dissolved, and obtain a transparent cobalt salt solution;

[0033] Step 2: Add to 100mL with a concentration of 0.15 mol·L in an ice-water bath -1 Add 0.003 mol of tetradecyltrimethylammonium bromide to the 1,2-propanediamine aqueous solution, ultrasonically disperse for 30 minutes, fully dissolve, and then add 0.1 mol of NaBH 4 Solid, continue to sonicate until completely dissolved to get NaBH 4 Alkaline solution, keep away from light;

[0034] Step 3: According to n(Co 2+ ) / n(BH 4 - ) = 5.70, respectively pipette 85mL of cobalt salt solution and 15mL of alkaline NaBH 4 solution, under nitrogen protection, NaBH at room temperature...

Embodiment 3

[0038] A method for preparing a Co-B amorphous alloy porous microsphere catalyst for ammonia boranol to explain hydrogen, comprising the following steps:

[0039] Step 1: Dissolve 15g of PVP into 100mL of water at room temperature, sonicate for 30 minutes, fully dissolve, then add 0.075 mol of cobalt sulfate, continue sonicating until completely dissolved, and obtain a transparent cobalt salt solution;

[0040] Step 2: Add to 100mL with a concentration of 0.10 mol·L in an ice-water bath -1 Add 0.002mol of dodecyltrimethylammonium bromide to the ethylenediamine aqueous solution, ultrasonically disperse for 30min, fully dissolve, and then add 0.075mol of NaBH 4 Solid, continue to sonicate until completely dissolved to obtain NaBH 4 Alkaline solution, keep away from light;

[0041] Step 3: According to n(Co 2+ ) / n(BH 4 - ) = 2.90, respectively pipette 74.5mL of cobalt salt solution and 25.5mL of alkaline NaBH 4 solution, under nitrogen protection, NaBH at room temperature ...

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Abstract

The invention relates to a binary amorphous-state alloy porous microspherical type efficient catalyst used for hydrogen release through catalytic alcoholysis of a hydrogen storage material ammonia borane and a preparation method for the binary amorphous-state alloy porous microspherical type efficient catalyst. A chemical formula of the catalyst can be abbreviated as CoxB(1-x), wherein a molar ratio of Co to B is x to (1-x), and x ranges from 0.15 to 0.85. The catalyst has an unformed amorphous-state phase structure, has an uniformly dispersed microspheric appearance, has a microsphere size ranging from 200 nm to 300 nm, is distributed with micropores in surface, and has a specific surface area ranging from 45 m<2>.g<-1> to 60 m<2>.g<-1>; a liquid-phase chemical process is adopted, the process is relatively simple and convenient, a high-temperature high-pressure reaction and treatment process is involved, time is relatively short, control is easy, and environmental pollution is avoided in a preparation process; and through liquid-phase chemical technological treatment, a Co-B amorphous-state alloy product still keeps certain magnetic characteristics, and therefore, the catalyst is quickly separated and recycled, regenerated and reused conveniently, and operation cost in a catalytic reaction process is favorably reduced.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a binary amorphous alloy porous microsphere high-efficiency catalyst suitable for hydrogen storage material ammonia borane catalyzed by alcohol to decompose hydrogen and a preparation method thereof. Background technique [0002] The theoretical hydrogen content of Ammonia Borane (abbreviated as AB) is as high as 19.6wt.%, which is the hydride-type hydrogen storage material with the highest hydrogen content found so far. AB is a stable white crystal at normal temperature and pressure, non-volatile, non-toxic, strong thermal stability, soluble in water and some organic solvents. With the assistance of suitable catalysts and reaction conditions, AB can controllably release hydrogen through pyrolysis, hydrolysis or alcoholysis. The thermal decomposition of hydrogen in AB is carried out in multiple steps, and the induction period is long. The temperature above 500 ° C i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75B01J35/08B01J35/10C01B3/02
CPCB01J23/75B01J35/0033B01J35/023B01J35/08B01J35/10B01J35/1014C01B3/02
Inventor 张军朱一明王杨段永华宋帮才米刚
Owner HENAN UNIV OF SCI & TECH
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