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Preparation method of bimetallic phosphide composite reduction graphene nano electrocatalytic material

An electrocatalytic material, graphene technology, applied in the field of material chemistry, can solve problems such as poor conductivity, unstable structure, and obstruction

Inactive Publication Date: 2019-08-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most metal-organic framework materials are unstable in structure and poor in conductivity, which hinder their application in electrocatalysis.

Method used

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  • Preparation method of bimetallic phosphide composite reduction graphene nano electrocatalytic material
  • Preparation method of bimetallic phosphide composite reduction graphene nano electrocatalytic material
  • Preparation method of bimetallic phosphide composite reduction graphene nano electrocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of NiCo-MOF74 / GO nanocomposites:

[0025] (a) adding 25 mg of single-layer graphene oxide to 25 mL of deionized water, ultrasonicating for 4 hours until the solution is uniform, and obtaining a graphene oxide solution with a concentration of 1 mg / mL;

[0026] (b) 1.71mmol cobalt acetate tetrahydrate and 0.29mmol nickel acetate tetrahydrate were added respectively to the graphene oxide solution prepared by step (a) and stirred for 30min until the solution was uniform to obtain solution A;

[0027] (c) Add 1 mmol of 2,5-dihydroxyterephthalic acid and 4 mmol of sodium hydroxide into 20 mL of deionized water, and stir for 30 min to obtain solution B;

[0028] (d) stirring and reacting solution A and solution B at room temperature for 24h;

[0029] (e) The product was centrifuged, washed three times with water and ethanol, and then dried in a freeze dryer at -80°C for 24 hours.

[0030] (2) Preparation of NiCo / P-rGO material:

[0031] The product bimetalli...

Embodiment 2

[0034] (1) Preparation of NiCo-MOF74 / GO nanocomposites:

[0035] (a) adding 25 mg of single-layer graphene oxide to 50 mL of deionized water, ultrasonicating for 4 hours until the solution is uniform, and obtaining a graphene oxide solution with a concentration of 0.5 mg / mL;

[0036] (b) 1.71mmol cobalt acetate tetrahydrate and 0.29mmol nickel acetate tetrahydrate were added respectively to the graphene oxide solution prepared by step (a) and stirred for 30min until the solution was uniform to obtain solution A;

[0037] (c) 1 mmol of 2,5-dihydroxyterephthalic acid and 4 mmol of sodium hydroxide were added to 30 mL of deionized water, and stirred for 30 min to obtain solution B;

[0038] (d) stirring and reacting solution A and solution B at room temperature for 18h;

[0039] (e) The product was centrifuged, washed four times with water and ethanol, and then dried in a freeze dryer at -80° C. for 30 h.

[0040] (2) Preparation of NiCo / P-rGO material:

[0041]The product bim...

Embodiment 3

[0043] (1) Preparation of NiCo-MOF74 / GO nanocomposites:

[0044] (a) adding 25 mg of single-layer graphene oxide to 40 mL of deionized water, ultrasonicating for 4 hours until the solution is uniform, and obtaining a graphene oxide solution with a concentration of 0.625 mg / mL;

[0045] (b) 1.71mmol cobalt acetate tetrahydrate and 0.29mmol nickel acetate tetrahydrate were added respectively to the graphene oxide solution prepared by step (a) and stirred for 30min until the solution was uniform to obtain solution A;

[0046] (c) Add 1 mmol of 2,5-dihydroxyterephthalic acid and 4 mmol of sodium hydroxide into 20 mL of deionized water, and stir for 30 min to obtain solution B;

[0047] (d) stirring and reacting solution A and solution B at room temperature for 36h;

[0048] (e) The product was centrifuged, washed 5 times with water and ethanol, and then dried in a freeze dryer at -80°C for 36 hours.

[0049] (2) Preparation of NiCo / P-rGO material:

[0050] The product bimetalli...

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Abstract

The invention discloses a preparation method of a bimetallic phosphide composite reduction graphene nano electro-catalytic material, which comprises the following steps of: 1) dissolving graphene oxide in water, and ultrasonically homogenizing; 2) respectively adding nickel acetate tetrahydrate and cobalt acetate tetrahydrate into graphene oxide solution, and uniformly stirring to obtain solutionA; 3) dissolving 2,5-dihydroxyterephthalic acid and sodium hydroxide in deionized water, and uniformly stirring to obtain solution B; (4) uniformly mix and reacting solution A and solution B, centrifugally collect to obtain precipitate, washing that precipitate, and freeze drying to obtain bimetallic MOF composite graphene oxide nano material containing Ni and Co; 5) respectively placing the material obtained in the step 4) and sodium hypophosphite in a tube furnace, raising the temperature under inert atmosphere and keeping the temperature for a period of time, and cooling to room temperatureto obtain Ni and Co-containing bimetallic phosphide composite reduction graphene nano electrocatalytic material NiCO / P-rGO. The method has simple operation and low cost, and the obtained material hasbetter electrocatalytic performance.

Description

technical field [0001] The invention belongs to the field of material chemistry, in particular to a method for preparing a bimetallic phosphide composite reduced graphene nanometer electrocatalytic material containing Ni and Co. Background technique [0002] With the rapid development of society, the demand for energy is increasing day by day. Traditional fossil energy can no longer meet the growing social needs and bring great pollution to the environment. Therefore, searching for clean and sustainable energy has become the focus of common attention. Hydrogen is considered to be an ideal alternative energy source to solve the current energy crisis and environmental problems due to its advantages of high energy density, high conversion efficiency and cleanliness. At present, hydrogen production by electrolysis of water is a widely used hydrogen production technology. The whole water splitting process includes two half-reactions: hydrogen evolution reaction (HER) and oxygen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J37/28C25B11/06C25B1/04
CPCB01J27/1853B01J37/28C25B1/04C25B11/091B01J35/33Y02E60/36
Inventor 刘毅赵蓉杨梦雅王欢姜永学王聪
Owner ZHEJIANG UNIV
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