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A kind of electrocatalytic material and its preparation method and application

An electrocatalytic material and conductive substrate technology, applied in the field of electrocatalytic hydrogen evolution, can solve the problems of small specific surface area, poor conductivity of cobalt molybdenum oxide, low charge transfer efficiency, etc., achieve high catalytic activity, good catalytic performance, and improve catalytic performance Effect

Active Publication Date: 2022-04-05
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the first aspect of the present invention proposes an electrocatalytic material that can overcome the defects of poor electrical conductivity, small specific surface area or low charge transport efficiency of cobalt molybdenum oxide

Method used

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  • A kind of electrocatalytic material and its preparation method and application
  • A kind of electrocatalytic material and its preparation method and application
  • A kind of electrocatalytic material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In this embodiment, an electrocatalytic material is prepared, and the specific process is as follows:

[0054] S1: A piece of NF (2.4cm*3cm) was ultrasonically cleaned with ethanol, acetone and 3mol / L hydrochloric acid aqueous solution for 30 minutes to remove oil and nickel oxide on the surface, and then washed with deionized water for 10 minutes, repeated 3 times. Then 146mg of Co(NO 3 ) 2 ·6H 2 O, 210mg of C 6 h 12 N 4 And the PVP of 255mg is dissolved in the mixed solution of 40mL deionized water and ethanol (H 2 O:ethanol=3:1, v / v). Transfer the mixed solution to a stainless steel autoclave lined with 50mL Teflon, immerse a piece of cleaned NF in the mixed solution and raise the temperature from room temperature to 120°C at a heating rate of 5°C / min, maintaining 120 ℃ for 12 hours, cooled to room temperature naturally, washed with deionized water and dried in an oven at 70 ℃;

[0055] S2: 582.1mg of Co(NO 3 ) 2 ·6H 2 O was dissolved in 120 mL of deionize...

Embodiment 2

[0058] In this embodiment, an electrocatalytic material is prepared, and the specific process is as follows:

[0059] S1: A piece of NF (2.4cm*3cm) was ultrasonically cleaned with ethanol, acetone and 3mol / L hydrochloric acid aqueous solution for 30 minutes to remove oil and nickel oxide on the surface, and then washed with deionized water for 10 minutes, repeated 3 times. Then 146mg of Co(NO 3 ) 2 ·6H 2 O, 210mg of C 6 h 12 N 4 and 255 mg of PVP were dissolved in 40 mL of deionized water. Transfer the mixed solution to a stainless steel autoclave lined with 50mL Teflon, immerse a piece of cleaned NF in the mixed solution and raise the temperature from room temperature to 120°C at a heating rate of 5°C / min, maintaining 120 ℃ for 12 hours, cooled to room temperature naturally, washed with deionized water and dried in an oven at 70 ℃;

[0060] S2: 582.1mg of Co(NO 3 ) 2 ·6H 2 O was dissolved in 120 mL of deionized water, heated to 80 °C, and then the nanosheet array pr...

Embodiment 3

[0063] In this embodiment, an electrocatalytic material is prepared, and the specific process is as follows:

[0064] S1: A piece of NF (2.4cm*3cm) was ultrasonically cleaned with ethanol, acetone and 3mol / L hydrochloric acid aqueous solution for 30 minutes to remove oil and nickel oxide on the surface, and then washed with deionized water for 10 minutes, repeated 3 times. Then 146mg of Co(NO 3 ) 2 ·6H 2 O, 210mg of C 6 h 12 N 4 and 255 mg of SDS were dissolved in a mixed solution of 40 mL of deionized water and ethanol (H 2 O:ethanol=5:1, v / v). Transfer the mixed solution to a stainless steel autoclave lined with 50mL Teflon, immerse a piece of cleaned NF in the mixed solution and raise the temperature from room temperature to 140°C at a heating rate of 5°C / min, maintaining 120 ℃ for 12 hours, cooled to room temperature naturally, washed with deionized water and dried in an oven at 70 ℃;

[0065] S2: 1.1642g of Co(NO 3 ) 2 ·6H 2 O was dissolved in 120 mL of deioniz...

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Abstract

The invention provides an electrocatalytic material and its preparation method and application. The combination of metal cobalt and cobalt molybdenum oxide layer enables cobalt to improve the inherent defect of poor electrical conductivity of the cobalt molybdenum oxide layer, thereby greatly improving the catalytic performance of the electrocatalytic material. performance. In the process of preparing electrocatalytic materials, the hydrogenation reduction reaction can generate a large number of defects on the surface while reducing the nanosheet material, which increases the exposure of electrochemically active sites. Compared with the catalytic performance of cobalt molybdenum oxide layer, the Co@CoMoO of the present invention x The nanosheet array composite material has better catalytic performance, and when used as a hydrogen evolution electrocatalyst, it can greatly improve the catalytic hydrogen evolution performance of the device.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic hydrogen evolution, and in particular relates to an electrocatalytic material and its preparation method and application. Background technique [0002] As a green and environmentally friendly energy source, hydrogen has the advantages of high energy density and no pollution waste generation, and is an ideal substitute for fossil fuels. As an important half-reaction of water electrolysis, hydrogen production by electrolysis of water is one of the most promising hydrogen production methods and has received extensive attention in recent decades. [0003] The electrolysis of water in alkaline medium can avoid the corrosion and dissolution of transition metals, thus providing better stability for transition metals and prolonging the catalytic time. Transition metal oxides have rich valence states and variable electronic structures, which are A class of promising electrocatalytic hydrogen prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/091C25B1/04C23C18/34C23C18/00
CPCC25B11/091C25B1/04C23C18/34C23C18/00Y02E60/36
Inventor 谢灵杰王宇李成飞吴金齐赵佳伟古林非李高仁
Owner SUN YAT SEN UNIV
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