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Low overpotential electrocatalyst for producing hydrogen by efficient water splitting and preparation method of electrocatalyst

An electrocatalyst and overpotential technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, electrolysis process, etc., can solve the problems of energy waste and high overpotential, achieve efficiency improvement, low energy consumption, and good industrial application foreground effect

Active Publication Date: 2017-03-15
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the overpotential of non-precious metal electrocatalysts in the prior art is too high and the energy is wasted seriously, the present invention has carried out in-depth research on the mechanism of hydrogen production by electrocatalytic cracking of water, and completed the invention

Method used

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  • Low overpotential electrocatalyst for producing hydrogen by efficient water splitting and preparation method of electrocatalyst
  • Low overpotential electrocatalyst for producing hydrogen by efficient water splitting and preparation method of electrocatalyst
  • Low overpotential electrocatalyst for producing hydrogen by efficient water splitting and preparation method of electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Get 0.249 grams of cobalt nitrate hexahydrate solid particles, add 20 milliliters of deionized water to the reaction vessel and stir for 40 minutes to dissolve completely;

[0025] (2) Get 0.173 grams of sodium selenite pentahydrate solid particles in another reaction vessel, then add 20 milliliters of diethylenetriamine liquid and stir until sodium selenite pentahydrate is completely dissolved;

[0026] (3) Mix the solutions in step (1) and step (2), then stir for 2 hours to make the mixture uniform;

[0027] (4) Cut the cut area to 4cm 2 Foam nickel (Ni) soaks 15 minutes with hydrochloric acid (volume fraction 37%), takes out foam nickel and then cleans 5 times with deionized water, then the foam nickel after deionized water cleaning is soaked in acetone liquid for 5 hours, The nickel foam is taken out and cleaned 12 times with absolute ethanol, and then the nickel foam is dried at room temperature;

[0028] (5) the cleaned foamed nickel of step (4) is put into ...

Embodiment 2

[0031] (1) Get 0.249 grams of cobalt nitrate hexahydrate solid particles, add 10 milliliters of deionized water in the reaction vessel and stir for 40 minutes to make it dissolve completely;

[0032] (2) Get 0.173 grams of sodium selenite pentahydrate solid particles in another reaction vessel, then add 30 milliliters of diethylenetriamine liquid and stir until sodium selenite pentahydrate is completely dissolved;

[0033] Step (3)~(5) is the same as embodiment 1,

[0034] (6) Put the reaction kettle in the step (5) into an electric blast oven that has been warmed up to 180 degrees in advance and keep it for 24 hours, and then take out the loaded product from the reaction kettle when the temperature of the reaction kettle drops to room temperature. Foam nickel, then wash 6 times with deionized water, 8 times with acetone, and 10 times with absolute ethanol, then put the cleaned foamed nickel that has grown on the product into an electric blast drying oven at 80 degrees Celsius a...

Embodiment 3

[0036] (1) Get 0.249 grams of cobalt nitrate hexahydrate solid particles, add 20 milliliters of deionized water to the reaction vessel and stir for 40 minutes to dissolve completely;

[0037] (2) Get 0.173 grams of sodium selenite pentahydrate solid particles in another reaction vessel, then add 20 milliliters of deionized water and stir until sodium selenite pentahydrate is completely dissolved;

[0038] (3) Mix the solutions in step (1) and step (2), and then stir for 2 hours;

[0039] (4) transfer the reaction solution to the reaction kettle of 150 milliliters that has been put into the band stainless steel substrate after mixing uniformly in the step (3) again;

[0040] (5) Put the reaction kettle in step (4) into an electric blast oven that has been warmed up to 180 degrees in advance and keep it for 24 hours, and then pour out the supernatant in the reaction kettle when the temperature of the reaction kettle drops to room temperature , the substrate was washed 5 times w...

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Abstract

The invention provides a low overpotential electrocatalyst for producing hydrogen by efficient water splitting and a preparation method of the electrocatalyst, and belongs to the technical field of catalyst preparation. The low overpotential electrocatalyst is prepared by in-situ growth of Co9Se8 on foamed nickel. The low overpotential electrocatalyst is prepared by one of cobalt nitrate hexahydrate, cobalt chloride, cobalt acetate or cobalt sulfate and one of sodium selenite pentahydrate, potassium selenite or seleninic acid in an organic amine environment in which the foamed nickel serves as a catalyst. The foamed nickel can serve as both a carrier and the catalyst of a synthetic reaction. The overpotential of the electrocatalyst is only -284mV when the electric current density is 80 mA / cm<-2> and is increased by more than 46.5% relative to that of pure foamed nickel with the overpotential of -530 mV when the electric current density is 80 mA / cm<-2>, and the electrocatalyst is a relatively low overpotential electrocatalyst in non noble metal electrocatalysts. The electrocatalyst is one of advanced technical means for the sustainable production of hydrogen energy, has good industrial application prospects and can be used to relieve an increasingly intense global energy supply pattern at present.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a high-efficiency composite cracking water hydrogen production low overpotential electrocatalyst prepared by in-situ growth of nine cobalt octaselenide on nickel foam and a preparation method thereof. Background technique [0002] With the acceleration of the global industrialization process, countries around the world have increasingly strong demand for energy, which makes the consumption of oil grow at an unprecedented rate. It is well known that oil belongs to fossil energy and is a non-renewable energy. In recent years, countries all over the world are facing the same problem. ——Oil is exhausted and energy supply is in short supply. [0003] Hydrogen energy is a new energy source with no pollution and high calorific value. The sustainable production technology of hydrogen production by cracking water has attracted widespread attention. The core proble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057C01B3/04C25B11/06
CPCB01J27/0573C01B3/042C01B2203/1058C25B11/075Y02E60/36
Inventor 张宗弢岳新政王润伟易莎莎
Owner JILIN UNIV
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