Preparation method of copper hydroxide two-dimensional nanocomposite based on iron-based dopamine supramolecular modification

A nanocomposite material, copper hydroxide technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve toxicity, high cost of Pt-based catalytic materials, single synthesis cost of precursors, etc. problems, to achieve the effect of simple equipment, excellent stability, and excellent limiting current

Active Publication Date: 2022-06-03
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, fuel cell catalysts generally face the single obstacle of precursor and the problem of synthesis cost, as well as the defects of high cost and toxicity of Pt-based catalytic materials.

Method used

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  • Preparation method of copper hydroxide two-dimensional nanocomposite based on iron-based dopamine supramolecular modification
  • Preparation method of copper hydroxide two-dimensional nanocomposite based on iron-based dopamine supramolecular modification
  • Preparation method of copper hydroxide two-dimensional nanocomposite based on iron-based dopamine supramolecular modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] a 2D Cu(OH)2 The synthesis method of @PDA-Fe anode material includes the following steps:

[0063] (1) Weigh 720 mg CuCl 2 and 800 mg of PEG were dissolved in 400 mL of deionized water and stirred for 30 min to fully dissolve;

[0064] (2) Slowly add 3.2 mL of 6 M NaOH solution dropwise to the solution of step (1) and continue to stir at room temperature for 30 minutes, then let it stand to form a precipitate;

[0065] (3) The precipitate obtained in step (2) is washed with deionized water and centrifuged, and then freeze-dried;

[0066] (4) The product obtained after drying was added to deionized water, sonicated for 3 h, and then dried at 60 °C to obtain Cu(OH) 2 Nanosheets;

[0067] (5) 100 mg Cu(OH) 2 The nanosheets were dispersed in 20 mL of absolute ethanol and sonicated for 30 min to obtain Cu(OH) 2 Dispersions;

[0068] (6) 189.6 mg of dopamine and 80.8 mg of Fe(NO) 3 ·9H 2 O (molar ratio of 5:1) was dissolved in 20 mL of absolute ethanol;

[0069] (7)...

Embodiment 2

[0073] a 2D Cu(OH)2 The synthesis method of @PDA-Fe anode material includes the following steps:

[0074] (1) Weigh 720 mg CuCl 2 and 800 mg of PEG were dissolved in 400 mL of deionized water and stirred for 30 min to fully dissolve;

[0075] (2) Slowly add 3.2 mL of 6 M NaOH solution dropwise to the solution of step (1) and continue to stir at room temperature for 30 minutes, then let it stand to form a precipitate;

[0076] (3) The precipitate obtained in step (2) is washed with deionized water and centrifuged, and then freeze-dried;

[0077] (4) The product obtained after drying was added to deionized water, sonicated for 3 h, and then dried at 60 °C to obtain Cu(OH) 2 Nanosheets;

[0078] (5) 100 mg Cu(OH) 2 The nanosheets were dispersed in 20 mL of absolute ethanol and sonicated for 30 min to obtain Cu(OH) 2 Dispersions;

[0079] (6) Combine dopamine and 80.8 mg Fe(NO) 3 ·9H 2 O was dissolved in 20 mL absolute ethanol in molar ratios of 1:1, 5:1, 10:1, 15:1, and ...

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Abstract

The invention discloses a method for preparing a copper hydroxide two-dimensional nanocomposite material based on iron-based dopamine supramolecular modification, which uses CuCl 2 , PEG, etc. as raw materials to prepare Cu(OH) 2 nanosheets, which were then dispersed in absolute ethanol to obtain Cu(OH) 2 solution, then add dopamine and Fe(NO) 3 9H 2 O, through hydrothermal reaction and heat treatment, a 2D material that can be used as a fuel cell anode material is finally prepared Cu(OH)2 @PDA‑Fe. The composite material obtained in the present invention has higher initial potential, half-slope potential, excellent limiting current, excellent stability and good methanol tolerance, has strong resistance to methanol poisoning, etc., and can solve the problem of existing fuel cells. The catalyst has problems such as single precursor, high cost and toxicity of Pt-based catalytic materials, and it is expected to be used to replace Pt / C catalysts.

Description

technical field [0001] The invention belongs to the field of fuel cell electrocatalysis, in particular to a preparation method of a copper hydroxide two-dimensional nanocomposite material based on iron-based dopamine supramolecular modification. Background technique [0002] The extensive use of fossil fuels such as coal, oil, and natural resources provides energy for most of the world's industries and promotes social and economic development. However, the use of fossil energy has caused serious energy and environmental problems. The increasingly serious environmental pollution and energy crisis have prompted People seek clean and renewable energy devices such as fuel cells. Oxygen reduction reaction (ORR) is an indispensable cathode process in fuel cells, but its slow kinetic process and high activation energy restrict the large-scale application of fuel cells. At present, Pt / C catalyst is the only catalyst material that has been commercialized, but its development is limi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/90H01M8/1011B82Y40/00B82Y30/00
CPCH01M4/8647H01M4/8663H01M4/9016H01M8/1011B82Y40/00B82Y30/00Y02E60/50
Inventor 肖高林惠影
Owner FUZHOU UNIV
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