Preparation method of graphene-based iridium copper nano composite material

A composite material, alkenyl iridium technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of large difference in carbon powder morphology, low catalyst uniformity and dispersion, and grinding degree. Limitation and other problems, to achieve the effect of increasing the number of active sites, increasing the number of electrocatalytic active sites, and improving catalytic performance

Inactive Publication Date: 2020-11-20
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when grinding carbon-supported iridium-nickel complexes, the degree of grinding is limited, and the morphology of the carbon powder itself varies greatly, so the overall uniformity and dispersion of the catalyst are low

Method used

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  • Preparation method of graphene-based iridium copper nano composite material
  • Preparation method of graphene-based iridium copper nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment includes the following steps:

[0029] Step 1, the IrCl 3 and CuCl 2 Dissolve in deionized water to obtain a mixed solution; in the mixed solution, IrCl 3 and CuCl 2 The total concentration of is 1g / L, and the element molar ratio of iridium and copper is 1:1;

[0030] Step 2, adding graphene oxide powder to the mixed solution prepared in step 1, and then ultrasonically dispersing for 1 h to obtain a suspension; the quality of the graphene oxide powder is 1 times the metal equivalent in the mixed solution;

[0031] Step 3, sending the suspension obtained in step 2 into a spray dryer at a feeding rate of 50mL / h, and performing atomization and drying at 120° C. to obtain a powder of graphene oxide-loaded mixed metal salt;

[0032] Step 4, placing the powder of the graphene oxide loaded mixed metal salt obtained in step 3 in a tube furnace for synchronous thermal reduction treatment to obtain graphene-based iridium-copper nanocomposites; the process of t...

Embodiment 2

[0036] This embodiment includes the following steps:

[0037] Step 1, the IrCl 3 and CuCl 2 Dissolve in deionized water to obtain a mixed solution; in the mixed solution, IrCl 3 and CuCl 2 The total concentration of is 5g / L, and the element molar ratio of iridium and copper is 1:1;

[0038] Step 2, adding graphene oxide powder to the mixed solution prepared in step 1, and then ultrasonically dispersing for 1 h to obtain a suspension; the quality of the graphene oxide powder is 1 times the metal equivalent in the mixed solution;

[0039]Step 3, sending the suspension obtained in step 2 into a spray dryer at a feed rate of 200mL / h, and performing atomization and drying at 250° C. to obtain a powder of graphene oxide-loaded mixed metal salt;

[0040] Step 4, placing the powder of the graphene oxide loaded mixed metal salt obtained in step 3 in a tube furnace for synchronous thermal reduction treatment to obtain graphene-based iridium-copper nanocomposites; the process of the ...

Embodiment 3

[0044] This embodiment includes the following steps:

[0045] Step 1, the IrCl 3 and CuCl 2 Dissolve in deionized water to obtain a mixed solution; in the mixed solution, IrCl 3 and CuCl 2 The total concentration of is 0.5g / L, and the element molar ratio of iridium and copper is 1:4;

[0046] Step 2, adding graphene oxide powder to the mixed solution prepared in step 1, and then ultrasonically dispersing for 1 h to obtain a suspension; the quality of the graphene oxide powder is 2 times the metal equivalent in the mixed solution;

[0047] Step 3, sending the suspension obtained in step 2 into a spray dryer at a feed rate of 100mL / h, and performing atomization and drying at 150° C. to obtain a powder of graphene oxide-loaded mixed metal salt;

[0048] Step 4, placing the powder of the graphene oxide loaded mixed metal salt obtained in step 3 in a tube furnace for synchronous thermal reduction treatment to obtain graphene-based iridium-copper nanocomposites; the process of t...

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Abstract

The invention discloses a preparation method of a graphene-based iridium-copper nano composite material. The method comprises the following steps: 1, dissolving iridium salt and copper salt in deionized water to obtain a mixed solution; 2, adding graphene oxide powder into the mixed solution, and carrying out ultrasonic dispersion to obtain a turbid liquid; 3, atomizing and drying the turbid liquid to obtain graphene oxide-loaded mixed metal salt powder; and 4, carrying out synchronous thermal reduction treatment on the graphene oxide-loaded mixed metal salt powder to obtain the graphene-basediridium-copper nano composite material. According to the invention, a method of combining spray drying with synchronous thermal reduction is adopted, nano particles of iridium and copper mixed salt are uniformly loaded on the surface of the graphene oxide, the graphene-based iridium-copper nano composite material prepared by adopting the method has the advantages that agglomeration of nano particles of iridium and copper mixed salt is reduced, the number of active sites on the surface of the graphene-based iridium-copper nano composite material is increased, the catalytic performance of the graphene-based iridium-copper nano composite material is improved, the service life of the graphene-based iridium-copper nano composite material is prolonged, and the utilization efficiency of the graphene-based iridium-copper nano composite material is improved.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a preparation method of a graphene-based iridium-copper nanocomposite material. Background technique [0002] Hydrogen energy is an environmentally friendly renewable energy, which has extremely high application value in the field of fuel cells. The source of hydrogen mainly includes the cracking of organic matter and water, among which electrolysis of water is considered to be the best way to produce hydrogen. In the process of electrocatalytic water splitting, the generation of 1 hydrogen molecule requires the transfer of 2 electrons, and the generation of 1 oxygen molecule requires the transfer of 4 electrons. Therefore, the rate of water splitting mainly depends on the rate of oxygen evolution reaction on the anode. . [0003] Catalysts are materials that increase the rate of electrocatalytic reactions. At present, iridium and its oxides have th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00H01M4/9041H01M4/9083Y02E60/50
Inventor 戎万党蕊孟晗琪
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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