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A kind of preparation method of electrode material for hydrogen production by electrolysis of water

An electrode material and electrolyzed water technology, applied in the environmental field, can solve the problems of limited application and few electrocatalysts, and achieve the effects of reduced production cost, good crystallinity, and excellent hydrogen evolution ability of electrolyzed water

Active Publication Date: 2019-11-08
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because MOFs not only have a highly regular pore structure and porosity, but also have open active metal sites with Lewis acid and redox activity, they have attractive prospects for applications such as catalysts, but the conductivity of MOFs limits MOFs. In the application of electrolysis of water and hydrogen evolution, the combination of MOFs and some conductive substances can obtain some new electrocatalytic materials with electrocatalytic properties
At present, there are relatively few reports on electrocatalysts based on MOFs composites.

Method used

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  • A kind of preparation method of electrode material for hydrogen production by electrolysis of water
  • A kind of preparation method of electrode material for hydrogen production by electrolysis of water
  • A kind of preparation method of electrode material for hydrogen production by electrolysis of water

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Embodiment 1

[0024] First weigh 0.1mmol of cobalt perchlorate, 0.1mmol of 1,4-naphthalene diacid (H2ndc), 0.1mmol of 1,4-bis(imidazol-1-yl)butane and 2mL of 0.1M sodium hydroxide solution in a beaker , add 2mL of deionized water and 4mL of absolute ethanol to it and stir for 30 minutes to disperse evenly. The above mixed solution was transferred to a polytetrafluoroethylene reactor and placed in a 140°C oven for 72 hours to react, and then the temperature was slowly lowered to 30°C over 5 hours to obtain a purple blocky crystal product. After ultrasonic cleaning with deionized water and drying at 60 °C, Co(ndc)(bidp)(H 2 O), take 40mg Co-MOFs and 10mg of acetylene black composite to prepare the electrocatalyst.

Embodiment 2

[0026] First weigh 0.1mmol of cobalt perchlorate, 0.2mmol of 1,4-naphthalene diacid (H2ndc), 0.1mmol of 1,4-bis(imidazol-1-yl)butane and 2mL of 0.1M sodium hydroxide solution in a beaker , add 2mL of deionized water and 4mL of absolute ethanol to it and stir for 30 minutes to disperse evenly. The above mixed solution was transferred to a polytetrafluoroethylene reactor and placed in a 160°C oven to react for 72 hours, and then slowly cooled down to 30°C over 5 hours to obtain a purple blocky crystal product. After ultrasonic cleaning with deionized water and drying at 60 °C, Co(ndc)(bidp)(H 2 O), take 40mg Co-MOFs and 10mg of acetylene black composite to prepare the electrocatalyst.

Embodiment 3

[0028] First weigh 0.1mmol of cobalt perchlorate, 0.2mmol of 1,4-naphthalene diacid (H2ndc), 0.2mmol of 1,4-bis(imidazol-1-yl)butane and 2mL of 0.1M sodium hydroxide solution in a beaker , add 2mL of deionized water and 4mL of absolute ethanol to it and stir for 30 minutes to disperse evenly. The above mixed solution was transferred to a polytetrafluoroethylene reactor and placed in a 180°C oven for 72 hours to react, and then the temperature was slowly lowered to 30°C over 5 hours to obtain a purple blocky crystal product. After ultrasonic cleaning with deionized water and drying at 60 °C, Co(ndc)(bidp)(H 2 O), take 40mg Co-MOFs and 10mg of acetylene black composite to prepare the electrocatalyst.

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Abstract

The invention relates to a cobalt metal organic framework material with the electro-catalytic hydrogen evolution property and a preparation method thereof, and belongs to the field of environmentally friendly electro-catalytic material preparation. The applied material synthesis method is a hydrothermal method. The method comprises the following steps that cobaltous perchlorate, 1,4-naphthalene dicarboxylic acid(H2ndc), 1,4-bis(imidazol-1-yl)butane and sodium hydroxide are uniformly dispersed in absolute ethyl alcohol and deionized water, and the mixed turbid liquid is transferred into a polytetrafluoroethylene reaction kettle for a hydrothermal reaction. The obtained product is washed and dried to obtain a purple bulk crystal, and the purple crystal and a certain mass of acetylene black are ground to obtain an electro-catalytic material [Co(ndc)(bidp)(H2O)]n. Accordingly, the preparation process is simple, an obtained electro catalyst has the good electro-catalytic hydrogen evolution capacity, and the Tafel slope can reach 45 mV / decade. A good application prospect is achieved in the fields such as environment-friendly energy production.

Description

technical field [0001] The invention relates to a cobalt metal organic framework material with electrocatalytic properties and a preparation method thereof, belonging to the environment [0002] The field of preparation of friendly electrocatalytic hydrogen evolution materials. Background technique [0003] Metal-organic frameworks (MOFs) are inorganic-organic hybrid functional materials assembled by metal ions and organic ligands through coordination bonds. Due to its flexible porosity, large specific surface area, and unsaturated coordination bonds, it has been widely used in molecular recognition, magnetism, photoluminescence, drug delivery, gas storage, and catalysis in recent years. MOFs materials are composed of metal ions or metal ion clusters connected by organic ligands to form a structure that expands infinitely in three-dimensional space, thus having the advantages of both inorganic and organic materials. Inspired by the research on the electrocatalytic properti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/16C25B1/04C25B11/06C08G83/00
CPCB01J31/1691C08G83/008C25B1/04C25B11/04Y02E60/36
Inventor 吴亚盘周威李东升赵君董文文张健张其春
Owner CHINA THREE GORGES UNIV