Monocrystal porous V2Se9 nanosheet array electro-catalysis material and preparation method thereof

A technology of nanosheet array and electrocatalytic material, which is applied in the field of preparation of single crystal porous nine-vanadium selenide nanosheet array electrocatalytic material and electrocatalytic material, which can solve the problems of high price, increased energy consumption, and increased reaction rate. , to achieve the effects of improved electrocatalytic activity, excellent stability, and reduced hydrogen production costs

Inactive Publication Date: 2017-06-13
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, platinum-based noble metal catalysts are the best hydrogen evolution catalysts, but their large-scale applications are largely limited due to their high cost.
In addition, due to the increase in energy consumption due to the existence of the overpotential of the hydrogen evolution reaction, in order to increase the reaction rate and reduce the overpotential, it is imminent to study and prepare high-efficiency hydrogen evolution reaction electrocatalysts.

Method used

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  • Monocrystal porous V2Se9 nanosheet array electro-catalysis material and preparation method thereof
  • Monocrystal porous V2Se9 nanosheet array electro-catalysis material and preparation method thereof
  • Monocrystal porous V2Se9 nanosheet array electro-catalysis material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1, according to the following steps to prepare a single crystal porous nine vanadium selenide nanosheet array electrocatalytic material:

[0029] (1) Prepare a hydrochloric acid solution with a concentration of 1 mol / liter as the first aqueous solution, put the nickel foam of the conductive substrate into the first aqueous solution and ultrasonically clean it for 5 minutes, then put the conductive substrate into absolute ethanol and ultrasonically clean it for 5 minutes, and take out the foam Nickel, placed in an oven to dry.

[0030] (2) The ammonium metavanadate solution with a preparation concentration of 1mol / liter is used as the second aqueous solution, and after 10 minutes of magnetic stirring, the pH value of the second aqueous solution is adjusted to 1 by using the first aqueous solution, and then transferred to the reaction kettle after 10 minutes of magnetic stirring , put nickel foam into the reaction kettle obliquely, seal the reaction kettle, put it...

Embodiment 2

[0035] Example 2, according to the following steps to prepare a single crystal porous nine vanadium selenide nanosheet array electrocatalytic material:

[0036] (1) Prepare a hydrochloric acid solution with a concentration of 0.5 mol / liter as the first aqueous solution, put the titanium sheet into the first aqueous solution and ultrasonically clean it for 5 minutes, then put the conductive substrate into absolute ethanol and ultrasonically clean it for 5 minutes, and take out the titanium sheet , put in an oven to dry.

[0037] (2) Prepare the ammonium metavanadate solution with a concentration of 4mol / liter as the second aqueous solution, use the first aqueous solution to adjust the pH value of the second aqueous solution to 3 after magnetic stirring for 10 minutes, and then transfer it to the reaction kettle after magnetic stirring for 10 minutes , place the titanium sheet obliquely into the reaction kettle, seal the reaction kettle, put it into a blast drying oven, raise th...

Embodiment 3

[0041] Example 3, according to the following steps to prepare a single crystal porous nine vanadium selenide nanosheet array electrocatalytic material:

[0042] (1) Prepare a hydrochloric acid solution with a concentration of 1 mol / liter as the first aqueous solution, put the copper sheet into the first aqueous solution and ultrasonically clean it for 5 minutes, then put the conductive substrate into absolute ethanol and ultrasonically clean it for 5 minutes, and take out the copper sheet , put in an oven to dry.

[0043] (2) Preparation concentration is the ammonium metavanadate solution of 3mol / liter as the second aqueous solution, utilizes the first aqueous solution to adjust the pH value of the second aqueous solution to 3 after magnetic stirring for 10 minutes, then transfers to the reaction kettle after magnetic stirring for 10 minutes , place the copper sheet obliquely into the reaction kettle, seal the reaction kettle, put it into a blast drying oven, raise the tempera...

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PUM

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Abstract

The invention discloses a monocrystal porous V2Se9 nanosheet array electro-catalysis material. A V2Se9 nanosheet array grows on a conductive substrate, and V2Se9 is of a monocrystal porous structure. A preparation method of the monocrystal porous V2Se9 nanosheet array electro-catalysis material comprises the following steps: preparing ammonium metavanadate solution with the concentration of 1-4 mol / L, adjusting pH to be 1-3, transferring the solution to a reaction still, putting a conductive substrate in the reaction still, sealing the reaction still, carrying out first-time hydrothermal reaction, growing an ammonium metavanadate nanosheet array on the surface of the conductive substrate, taking out the conductive substrate, washing the surface of the conductive substrate with deionized water, and drying the conductive substrate; calcining the treated conductive substrate in the first step in a muffle furnace to obtain a porous V2O5 nanosheet array; rapidly transferring prepared sodium hydrogen selenide solution to the reaction still, obliquely placing the obtained conductive substrate in the reaction still, sealing the reaction still, then, putting the reaction still in a blasting drying oven, and carrying out second-time hydrothermal reaction; and preparing the V2Se9 nanosheet array. The monocrystal porous V2Se9 nanosheet array electro-catalysis material reduces the hydrogen production cost and has the catalytic activity equivalent to that of platinum.

Description

technical field [0001] The invention relates to a single-crystal porous nonavanadium selenide nanosheet array electrocatalytic material, and also relates to a preparation method of the electrocatalytic material, which belongs to the field of catalysis. Background technique [0002] Energy and environmental issues in today's world have increasingly become bottlenecks restricting economic and social development. Due to its high calorific value and no environmental pollution during use, hydrogen energy is expected to be a promising energy source to replace fossil fuels. At present, the sources of hydrogen mainly include hydrogen production from fossil fuels, hydrogen production from photolysis of water, hydrogen production from biomass, and hydrogen production from electrolysis of water. Among them, hydrogen production by electrolysis of water is an important means that is green, environmentally friendly, easy to realize industrialization, and cheap. At present, platinum-base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/03C25B11/06C25B1/04
CPCC25B1/04C25B11/031C25B11/095Y02E60/36
Inventor 王煜许海涛张慧娟
Owner CHONGQING UNIV
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