a w 18 o 49 Preparation method of /nf self-supporting electrocatalytic material

An electrocatalytic material and self-supporting technology, applied in the field of composite materials, can solve problems such as the influence of nanomaterials on electrochemical performance

Active Publication Date: 2021-07-06
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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  • a w <sub>18</sub> o <sub>49</sub> Preparation method of /nf self-supporting electrocatalytic material
  • a w <sub>18</sub> o <sub>49</sub> Preparation method of /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 30 minutes of ultrasonic treatment, 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%,...

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 W 18 o 49 / NF self-supporting electrocatalytic material preparation method, adding tungsten source to mixed alcohol to obtain solution A; adding analytically pure ethylenediamine and cycloheptylamine to solution A to obtain solution B; pouring solution B into polytetrafluoroethylene lined with a high-pressure reactor, then put nickel foam into a polytetrafluoroethylene reactor containing solution B for hydrothermal reaction, cool to room temperature after the reaction, and centrifugally wash the final reactant with absolute ethanol. The material is dried to obtain W 18 o 49 / NF self-supporting electrocatalytic materials. In the present invention, oxygen-deficient rich W 18 o 49 Direct growth on nickel foam (NF) by a one-step method not only avoids the influence of the binder on the conductivity and activity of the catalyst during the preparation of the working electrode, but also can effectively improve the electrocatalytic performance.

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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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888B01J35/04B01J37/34B01J37/10C25B11/061C25B11/077C25B11/03C25B1/04
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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