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Preparation method of W18o49/NF self-supporting electrocatalytic material

An electrocatalytic material, self-supporting technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as the influence of nanomaterials electrochemical performance, and avoid the influence of conductivity and activity. , low energy consumption, and the effect of improving electrocatalytic performance

Active Publication Date: 2019-05-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, often overlooked, oxygen vacancy engineering has a great impact on improving the electrochemical performance of nanomaterials.

Method used

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  • Preparation method of W18o49/NF self-supporting electrocatalytic material
  • Preparation method of W18o49/NF self-supporting electrocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Add WCl 6 Add a volume ratio of absolute ethanol: isopropanol: n-butanol = 1:1:1 mixed alcohol to make a 0.05mol / L solution A;

[0031] 2) Add analytically pure ethylenediamine and cycloheptylamine to solution A, so that ethylenediamine, cycloheptylamine and WCl 6 The ratio of the amount of the substances is 0.5:0.5:1 to obtain solution B, seal solution B with plastic wrap, then magnetically stir for 30 minutes, and ultrasonically treat for 5 minutes to obtain uniformly mixed solution B;

[0032] 3) first immerse the foamed nickel with a length of 7cm and a width of 1cm in acetone for 30 minutes, then place the processed nickel foam in a 3mol / L HCl solution for 30 minutes, then use pure water for 30 minutes, and finally Then place it in absolute ethanol for ultrasonic treatment for 30 min, and continue to rinse with absolute ethanol for 3 times;

[0033] 4) Pour solution B into a polytetrafluoroethylene-lined autoclave according to a volume filling ratio of 40%, an...

Embodiment 2

[0039] 1) Will W(CO) 6 Add a volume ratio of absolute ethanol: isopropanol: n-butanol = 1:0.3:0.2 mixed alcohol to make a 0.03mol / L solution A;

[0040] 2) Add analytically pure ethylenediamine and cycloheptylamine to solution A, so that ethylenediamine, cycloheptylamine and W(CO) 6The ratio of the amount of the substance is 0.2:0.1:1 to obtain solution B, seal solution B with plastic wrap, then magnetically stir for 30 minutes, and ultrasonically treat for 10 minutes to obtain uniformly mixed solution B;

[0041] 3) first immerse the nickel foam with a length of 7 cm and a width of 1 cm in acetone for 20 minutes, then place the processed nickel foam in a 3 mol / L HCl solution for 20 minutes, then use pure water for 30 minutes, and finally Then place it in absolute ethanol for ultrasonic treatment for 30 minutes, and continue to rinse with absolute ethanol for 5 times;

[0042] 4) Pour solution B into a polytetrafluoroethylene-lined autoclave according to a volume filling rat...

Embodiment 3

[0047] 1) Add WCl 6 Add a volume ratio of absolute ethanol: isopropanol: n-butanol = 1:0.5:0.5 mixed alcohol to make a 0.03mol / L solution A;

[0048] 2) Add analytically pure ethylenediamine and cycloheptylamine to solution A, so that ethylenediamine, cycloheptylamine and WCl 6 The ratio of the amount of the substance is 0.3:0.3:1 to obtain solution B, seal solution B with plastic wrap, then magnetically stir for 25 minutes, and ultrasonically treat for 5 minutes to obtain uniformly mixed solution B;

[0049] 3) first immerse the foamed nickel with a length of 6cm and a width of 1cm in acetone for 25 minutes, then place the processed nickel foam in a 4mol / L HCl solution for 25 minutes, then use pure water for 30 minutes, and finally Then place it in absolute ethanol for ultrasonic treatment for 25 minutes, and continue to rinse with absolute ethanol for 3 times;

[0050] 4) Pour solution B into a polytetrafluoroethylene-lined autoclave according to a volume filling ratio of ...

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Abstract

A preparation method of a W18o49 / NF self-supporting electrocatalytic material comprises: adding a tungsten source into a mixed alcohol to obtain a solution A; adding analytically pure ethanediamine and cycloheptylamine into the solution A to obtain a solution B; pouring the solution B into a polytetrafluoroethylene-lined high-pressure reactor, subjecting nickel foam to hydrothermal reaction in thepolytetrafluoroethylene-lined high-pressure reactor with the solution B, cooling to room temperature after the reaction is over, centrifugally washing the final reaction product with absolute ethyl alcohol, and drying the centrifugally washed material to obtain the W18o49 / NF self-supporting electrocatalytic material. Since W18O49 having rich oxygen defects is directly grown on NF (nickel foam) through a one-step process, the influence of adhesive upon electrical conductivity and activity of a catalyst during preparation of a working electrode is avoided, with electrocatalytic performance effectively improved.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a W 18 o 49 / NF self-supporting electrocatalytic materials preparation method. Background technique [0002] Fossil fuel shortages and global climate deterioration are widespread concerns and urgency for researchers to develop alternative energy sources. Electrochemical electrolysis of water has been recognized as one of the most promising renewable energy conversion technologies among sustainable and clean energy resources. To ensure efficient water splitting, efficient and stable electrocatalysts with simultaneously significantly reduced overpotentials for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are required. At present, catalysts containing noble metals such as Pt and its alloys, RuO 2 and IrO 2 Still the most effective catalyst for OER and HER. However, the high cost and relative scarcity of noble metals limit their large-sc...

Claims

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Application Information

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IPC IPC(8): B01J23/888B01J35/04B01J37/34B01J37/10C25B11/06C25B11/03C25B1/04
CPCY02E60/36
Inventor 黄剑锋海国娟冯亮亮曹丽云介燕妮杨佳付常乐吴建鹏
Owner SHAANXI UNIV OF SCI & TECH
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