A kind of boron-doped cobalt hydroxide loaded on porous copper substrate multi-level structure material and preparation method thereof

A technology of cobalt hydroxide and structural materials, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., to improve reaction activity, large reaction activity area, and facilitate electron transport Effect

Active Publication Date: 2021-11-05
安庆北化大科技园有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a boron-modified CoCu tertiary structure material with high active sites has not been reported

Method used

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  • A kind of boron-doped cobalt hydroxide loaded on porous copper substrate multi-level structure material and preparation method thereof
  • A kind of boron-doped cobalt hydroxide loaded on porous copper substrate multi-level structure material and preparation method thereof

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Effect test

Embodiment 1

[0030] A method for preparing a multi-level structure material loaded with boron-doped cobalt hydroxide on a porous copper substrate, comprising the following steps:

[0031] (1) Cut the foamed nickel mesh with an effective size of 20cm*8cm as the substrate, degrease with 1M soda ash solution, pickle with 1M hydrochloric acid, rinse with deionized water until neutral, and set aside;

[0032] (2) at 2M H 2 SO 4 , 1M CuSO 4 In the solution, with nickel foam as the cathode, apply 2000mA / cm 2 High current 600s, get porous copper / nickel foam; strong acid solution can avoid OH - Too much to prevent the formation of copper hydroxide;

[0033] (3) Using porous copper / nickel foam as cathode material, Co(NO 3 ) 2 In the solution, apply a small current of 10mA / cm 2 By 120s, cobalt hydroxide nanosheets were electrodeposited on the porous copper to obtain cobalt hydroxide nanosheets / porous copper / nickel foam;

[0034] (4) With cobalt hydroxide nanosheet / porous copper / nickel foam as...

Embodiment 2

[0037] A method for preparing a multi-level structure material loaded with boron-doped cobalt hydroxide on a porous copper substrate, comprising the following steps:

[0038] (1) Cut titanium mesh with an effective size of 20cm*20cm as the substrate, degrease with 1M soda ash solution, pickle with 1M hydrochloric acid, rinse with deionized water until neutral, and set aside;

[0039] (2) at 1.5M H 2 SO 4 , 0.8M CuSO 4 In the solution, with the titanium mesh as the cathode, apply 1000mA / cm 2 High current 480s, get porous copper / titanium mesh; strong acid solution can avoid OH - Too much to prevent the formation of copper hydroxide;

[0040] (3) Using porous copper / titanium mesh as cathode material, Co(NO 3 ) 2 solution, apply a small current of 20mAcm -2 By 60s, electrodeposit cobalt hydroxide nanosheets on the porous copper to obtain cobalt hydroxide nanosheets / porous copper / titanium mesh;

[0041] (4) Cobalt hydroxide / porous copper / titanium mesh is used as the cathode...

Embodiment 3

[0043] A method for preparing a multi-level structure material loaded with boron-doped cobalt hydroxide on a porous copper substrate, comprising the following steps:

[0044] (1) Cut the nickel mesh with an effective size of 10cm*20cm as the substrate, degrease with 1M soda ash solution, pickle with 1M hydrochloric acid, rinse with deionized water until neutral, and set aside;

[0045] (2) at 1.5M H 2 SO 4 , 1.2M CuSO 4 In the solution, with the cleaned nickel mesh as the cathode, apply 2000mA / cm 2 High current 200s, get porous copper / nickel mesh; strong acid solution can avoid OH - Too much to prevent the formation of copper hydroxide;

[0046] (3) Co(NO 3 ) 2In the solution, apply a small current of 10mA / cm 2 Up to 90s, electrodeposit cobalt hydroxide nanosheets on the above-mentioned porous copper to obtain cobalt hydroxide nanosheets / porous copper / nickel mesh;

[0047] (4) Cobalt hydroxide / porous copper / nickel mesh is used as cathode, in 1M NaBH 4 solution, carry ...

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Abstract

The invention discloses a multi-level structure material in which boron-doped cobalt hydroxide is supported on a porous copper substrate, and relates to the field of preparation of catalytic materials. The tertiary structure of nano-sheets, the present invention also provides the preparation method of the above-mentioned multi-level structure material, it supports porous copper layer by electrodeposition, then supports cobalt hydroxide nano-sheet layer by electrodeposition, finally through sodium borohydride-electrochemical combination Boronation realizes the boration of cobalt hydroxide nanosheets; the beneficial effect of the present invention is that the prepared multi-level structure material has abundant active sites, convenient electron transport and solution mass transfer channels, and is a series of electrochemical, chemical Excellent multi-level structure catalyst required for the reaction.

Description

technical field [0001] The invention relates to the field of preparation of catalytic materials, in particular to a multi-level structure material in which boron-doped cobalt hydroxide is loaded on a porous copper substrate and a preparation method thereof. Background technique [0002] Cobalt is a common electrocatalytic material, especially two-dimensional cobalt and cobalt hydroxide nanosheets in catalytic / electrocatalytic NaBH 4 , N 2 h 4 , NH 3 -BH 3 Hydrogenolysis and electrolysis of water for hydrogen evolution and oxygen evolution have high catalytic performance, and boration can further improve the catalytic activity. Patent 201610815684.X discloses a flaky porous cobalt boride powder and its preparation method, the powder is Co boride with an average thickness of 20nm x The B (x=1, 2, 3, 4) nanosheets are formed by interconnecting each other. The literature (CoB / Cu and PtCoB / Cucatalysts for borohydride fuel cells. Electrochimica Acta 2017, 225, 255-262.) repo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75B01J35/10
Inventor 唐阳庄姝娴万平玉杨晓进汪杰李牧洁仝思远熊海浪郭鹏凯徐李栋
Owner 安庆北化大科技园有限公司
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