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Preparation method and application of Cu-MOF/carbon dot nanosheet array catalyst

A nanosheet array and catalyst technology, applied in the field of composite materials and catalysis technology, can solve the problems of low reserves, high price, poor stability, etc., and achieve the effects of simple preparation process, many active sites, and easy industrialization.

Inactive Publication Date: 2019-01-11
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the developed oxygen electrocatalysts, Ir and Ru oxides are currently considered to be the most active catalysts for OER, but their high price, low reserves and poor stability are their insurmountable defects.

Method used

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  • Preparation method and application of Cu-MOF/carbon dot nanosheet array catalyst
  • Preparation method and application of Cu-MOF/carbon dot nanosheet array catalyst

Examples

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Effect test

Embodiment 1

[0027] Example 1 A preparation method of Cu-MOF / carbon dot nanosheet array catalyst

[0028] 0.160 g of Cu (NO 3 ) 2 3H 2 O dissolved in 2 mL DMA, 2 mL DMSO, 80 μL H 2 In the mixed solvent that O forms, obtain the copper nitrate solution of clarification;

[0029] 0.025 g H 6 L ligand, 0.26g sorbitol and copper nitrate solution are blended, add 0.8 mL HBF 4 , sonicated for 1 min to obtain a clear electrodeposition solution;

[0030] Using a 1.0 cm × 1.0 cm activated copper grid CuF as the working electrode, a platinum sheet as the auxiliary electrode, and a calomel electrode as the reference electrode, in a three-electrode system, a constant potential electrodeposition process was used to prepare Cu-MOF / sorbitol A composite material with nanosheet arrays supported on a copper grid; after washing it with water, it was activated in a 250 W microwave oven for 3 min to prepare an activated Cu-MOF / carbon dot / CuF nanosheet array composite material, namely Cu-MOF / carbon dot nan...

Embodiment 2

[0031] Example 2 A preparation method of Cu-MOF / carbon dot nanosheet array catalyst

[0032] 0.165 g of Cu (NO 3 ) 2 3H 2 O dissolved in 2.5 mL DMA, 2.5 mL DMSO, 100 μL H 2 In the mixed solvent that O forms, obtain the copper nitrate solution of clarification;

[0033] 0.030 g H 6 L ligand, 0.35 g sorbitol and copper nitrate solution were blended, and 0.9 mL HBF was added 4 , sonicated for 2 min to obtain a clear electrodeposition solution;

[0034]Using a 1.0 cm × 1.0 cm activated copper grid CuF as the working electrode, a platinum sheet as the auxiliary electrode, and a calomel electrode as the reference electrode, in a three-electrode system, a constant potential electrodeposition process was used to prepare Cu-MOF / sorbitol A composite material with nanosheet arrays supported on a copper grid; after washing it with water, it was activated in a 250 W microwave oven for 3 min to prepare an activated Cu-MOF / carbon dot / CuF nanosheet array composite material, namely Cu-MO...

Embodiment 3

[0035] Example 3 A preparation method of Cu-MOF / carbon dot nanosheet array catalyst

[0036] 0.170 g of Cu (NO 3 ) 2 3H 2 O dissolved in 3 mL DMA, 3 mL DMSO, 120 μL H 2 In the mixed solvent that O forms, obtain the copper nitrate solution of clarification;

[0037] 0.035 g H 6 L ligand, 0.30g sorbitol and copper nitrate solution were blended, and 1.0 mL HBF was added 4 , ultrasonic 3min, to obtain a clear electrodeposition solution;

[0038] Using a 1.0 cm × 1.0 cm activated copper grid CuF as the working electrode, a platinum sheet as the auxiliary electrode, and a calomel electrode as the reference electrode, in a three-electrode system, a constant potential electrodeposition process was used to prepare Cu-MOF / sorbitol A composite material with nanosheet arrays supported on a copper grid; after washing it with water, it was activated in a 250 W microwave oven for 3 min to prepare an activated Cu-MOF / carbon dot / CuF nanosheet array composite material, namely Cu-MOF / carbo...

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Abstract

The invention discloses a preparation method of a Cu-MOF / carbon dot nanosheet array catalyst, and an application of the material in water electrolysis for oxygen evolution, and belongs to the technical fields of the catalytic technology and composite materials. The preparation method comprises the following steps: mixing a copper nitrate solution with an H6L ligand and sorbitol to prepare an electrodeposition solution; and carrying out microwave activation on the obtained material in a three-electrode system by a potentiostatic electrodeposition process in order to obtain the Cu-MOF / carbon dotnanosheet array catalyst. The catalyst has the advantages of low cost of raw materials used for production, simple process, low reaction energy consumption and industrial application prospect. The catalyst is used for high-efficiency catalysis of water electrolysis for oxygen evolution, and has good oxygen evolution electrocatalysis activity and good electrochemical stability.

Description

technical field [0001] The invention discloses a preparation method of a Cu-MOF / carbon dot nanosheet array catalyst and the application of the material to electrolyze water for oxygen evolution, and belongs to the technical fields of catalytic technology and composite material. Background technique [0002] Hydrogen energy is an ideal green energy, and electrocatalytic water splitting to produce hydrogen has important development prospects. The oxygen evolution half reaction (OER) in the water splitting process is more difficult than the hydrogen evolution half reaction process, and needs to go through a complex proton-coulped electron transfer (PCET) process, with higher overpotential and more energy consumption , is the bottleneck of hydrogen production by electrolysis of water. Therefore, it is very important to find an oxygen evolution catalyst that can effectively reduce the oxygen evolution overpotential. Among the developed oxygen electrocatalysts, Ir and Ru oxides a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J31/30B01J37/34B82Y30/00B82Y40/00C25B1/04C25B11/06
CPCB01J31/1691B01J31/2213B01J31/30B01J37/343B01J37/348B82Y30/00B82Y40/00C25B1/04C25B11/095Y02E60/36
Inventor 侯莹匡轩李辉沈静
Owner UNIV OF JINAN
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