Preparation method of Fe2B-Co2B composite material-based sodium borohydride hydrolysis hydrogen production catalyst

A composite material and sodium borohydride technology are applied in the field of preparation of catalysts based on Fe2B-Co2B composite sodium borohydride hydrolysis for hydrogen production, which can solve the problems affecting wide application and high cost of precious metals, and achieve excellent stability and high sodium borohydride water. Analyzing the effect of hydrogen performance

Active Publication Date: 2021-11-05
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the high cost and scarcity of precious metals have seriously affected the wide application of industrialization, it is necessary to invent a non-precious metal sodium borohydride hydrolysis hydrogen production catalyst with abundant reserves, high efficiency and stability

Method used

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  • Preparation method of Fe2B-Co2B composite material-based sodium borohydride hydrolysis hydrogen production catalyst
  • Preparation method of Fe2B-Co2B composite material-based sodium borohydride hydrolysis hydrogen production catalyst
  • Preparation method of Fe2B-Co2B composite material-based sodium borohydride hydrolysis hydrogen production catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Preparation of Co 2 B catalyst:

[0022] Weigh 2 mmol of cobalt chloride hexahydrate, 60 mmol of sodium chloride and 60 mmol of urea and mix them thoroughly in a mortar, then put the ground samples in a blast oven at 60 °C for 4 hours. The dried sample was thoroughly ground again, and 12 mmol of sodium borohydride solid was added at room temperature, and the reaction was mixed for 1 hour. Subsequently, the reaction product was fully washed with deionized water, and the obtained product was collected and placed in a vacuum oven at 60 °C for 12 hours to obtain the product Co 2 B catalyst.

[0023] 2. Catalyst test:

[0024] Add 50 mL of 150 mM NaBH to a 100 mL three-neck round bottom flask 4 aqueous solution (containing 0.4 wt % NaOH), and then put the three-necked round-bottom flask in a water bath at 25 °C and keep stirring for 30 minutes until the reading of the electronic balance connected to the test does not change. Keep the above conditions of constant temp...

Embodiment 2

[0029] 1. Preparation of Fe 2 B catalyst:

[0030] Weigh 2 mmol of ferric chloride hexahydrate, 60 mmol of sodium chloride and 60 mmol of urea and mix them thoroughly in a mortar and grind them evenly, then place the ground samples in a blast oven at 60 °C for 4 hours. The dried sample was thoroughly ground again, and 12 mmol of sodium borohydride solid was added at room temperature, and the reaction was mixed for 1 hour. Subsequently, the reaction product was fully washed with deionized water, and the obtained product was collected and placed in a vacuum oven at 60 °C for 12 hours to obtain the product Fe 2 B catalyst.

[0031] 3. Catalyst test:

[0032] Add 50 mL of 150 mM NaBH to a 100 mL three-neck round bottom flask 4 aqueous solution (containing 0.4 wt% NaOH), then put the three-necked round-bottom flask in a water bath at 25 °C and keep stirring for 30 minutes until the reading of the electronic balance connected to the test does not change. Keep the above conditio...

Embodiment 3

[0034] 1. Preparation of Co 2 B‒Fe 2 B catalyst (Co:Fe=1:1):

[0035] Weigh 1 mmol of cobalt chloride hexahydrate, 1 mmol of ferric chloride hexahydrate, 60 mmol of sodium chloride and 60 mmol of urea and mix them thoroughly in a mortar, then place the ground sample in a 60 °C Insulate in forced air oven for 4 hours. The dried sample was thoroughly ground again, and 12 mmol of sodium borohydride solid was added at room temperature, and the reaction was mixed for 1 hour. Subsequently, the reaction product was fully washed with deionized water, and the obtained product was collected and placed in a vacuum oven at 60 °C for 12 hours to obtain the product Co 2 B‒Fe 2 B catalyst.

[0036] 2. Catalyst test:

[0037] Add 50 mL of 150 mM NaBH to a 100 mL three-neck round bottom flask 4 aqueous solution (containing 0.4 wt% NaOH), then put the three-necked round-bottom flask in a 25 °C water bath and keep stirring for 30 minutes until the reading of the electronic balance connect...

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Abstract

The invention belongs to the field of hydrogen evolution energy, and particularly relates to a preparation method of a Fe2B-Co2B composite material-based sodium borohydride hydrolysis hydrogen production catalyst, which adopts a solid-phase reaction method, adopts a sodium chloride solid as a template, and comprises the following steps: mixing cobalt chloride hexahydrate, ferric chloride hexahydrate and urea, fully and uniformly grinding, and then reacting with strong reducing agent sodium borohydride to prepare a sodium borohydride water desorption hydrogen evolution composite material catalyst with excellent catalytic performance. The Co2BFe2B composite material prepared from the non-noble metal cobalt and iron which are rich in reserves and relatively cheap has relatively high sodium borohydride hydrolysis hydrogen desorption performance and excellent stability, and the solid-phase reaction method provides an effective synthesis thought for preparing an efficient and stable sodium borohydride hydrolysis hydrogen desorption non-noble metal catalyst.

Description

technical field [0001] The invention belongs to the field of hydrogen evolution energy, specifically a Fe-based 2 B-Co 2 B composite material sodium borohydride hydrolysis hydrogen production catalyst preparation method. Background technique [0002] The environmental pollution caused by the massive consumption of non-renewable energy (such as oil, coal and natural gas) forces people to speed up the search for sustainable clean energy to replace fossil energy. Among the many clean energy sources, hydrogen is one of the most promising energy carriers because of its high heat of combustion (142 MJ kg−1) and environmentally friendly combustion products. It also has potential uses in various energy conversion devices (hydrogen fuel cells). Common hydrogen storage materials include sodium borohydride (NaBH 4 ), ammonia borane (NH 3 BH 3 ), lithium aluminum hydride (LiAlH 4 ) and magnesium hydride (MgH2), etc. where NaBH 4 Due to its high hydrogen storage density (10.6wt....

Claims

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Application Information

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IPC IPC(8): B01J23/75C01B3/06
CPCB01J23/75C01B3/065B01J35/23Y02E60/50
Inventor 杨秀林刘奕周树清
Owner GUANGXI NORMAL UNIV
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