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Preparation method of flower-like nano-palladium/foamed nickel catalytic material and application of flower-like nano-palladium/foamed nickel catalytic material in electrocatalytic reduction dechlorination reaction

A catalytic material and nickel foam technology, which are applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high dechlorination efficiency, long dechlorination time, and complex catalytic material preparation technology. , to achieve the effects of high dechlorination efficiency, low cost and simple preparation method

Inactive Publication Date: 2020-06-09
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The Chinese invention patent with the publication number CN101074133A discloses a process for dechlorination of chlorinated hydrocarbons in industrial wastewater. The process is suitable for the dechlorination of chlorinated hydrocarbons in industrial wastewater. Chloromethane, carbon tetrachloride, vinyl chloride, trichloroethylene, tetrachloroethylene, etc., and dechlorination takes a long time, this method does not involve the dechlorination of chlorine-containing aromatic pollutants
The Chinese invention patent with publication number CN101565356A discloses a method for low-temperature dechlorination of chlorinated phenols. The method is to use palladium carbon catalyst to dechlorinate chlorinated phenols. The dechlorination efficiency is high, but the relationship between the catalyst and the reactants and products needs to be considered. Separation, the catalyst needs to be continuously activated
The Chinese invention patent with the publication number CN102658127A discloses a 1,2-dichloroethane selective hydrodechlorination catalyst and its preparation method and application. The preparation technology of the catalytic material is relatively complicated

Method used

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  • Preparation method of flower-like nano-palladium/foamed nickel catalytic material and application of flower-like nano-palladium/foamed nickel catalytic material in electrocatalytic reduction dechlorination reaction
  • Preparation method of flower-like nano-palladium/foamed nickel catalytic material and application of flower-like nano-palladium/foamed nickel catalytic material in electrocatalytic reduction dechlorination reaction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] First put the nickel foam (2cm*2cm*1.2cm) electrode into acetone for ultrasonic degreasing, then soak it in 0.5mol / L dilute sulfuric acid to remove surface oxides, then clean it with ultrasonic oscillation in distilled water, and finally use high Dry it with pure nitrogen and save it for later use.

[0032] Get a piece of cleaned foam nickel (2cm*2cm*1.2cm) and put it into 40ml of 0.25mmol / L palladium chloride solution (the concentration of palladium chloride in the mixed solution), the amount of palladium chloride and sodium chloride The ratio is 1:500, react in a shaker at 25°C with a speed of 160 times / min for 0.5h, the light yellow color of the solution recedes, take out the electrode and rinse it gently with deionized water for 3 times, dry it with nitrogen, and prepare a flower The nanometer palladium / foam nickel catalytic electrode is used as the working electrode. The dechlorination reaction is an H-type three-electrode system: the prepared flower-shaped nano-p...

Embodiment 2

[0034] First put the nickel foam (2cm*2cm*1.2cm) electrode into acetone for ultrasonic degreasing, then soak it in 0.5mol / L dilute sulfuric acid to remove surface oxides, then clean it with ultrasonic oscillation in distilled water, and finally use high Dry it with pure nitrogen and save it for later use.

[0035]Take a piece of cleaned foam nickel (2cm*2cm*1.2cm) and put it into 40ml of 0.5mmol / L palladium chloride solution (the concentration of palladium chloride in the mixed solution), the amount of palladium chloride and sodium chloride The ratio is 1:100, react in a shaker at 40°C with a speed of 160 times / min for 2 hours, the light yellow color of the solution fades, take out the electrode and rinse it gently with deionized water for 3 times, dry it with nitrogen, and prepare a flower shape The nano-palladium / nickel foam catalytic electrode is used as the working electrode. The dechlorination reaction is an H-type three-electrode system: the prepared flower-shaped nano-...

Embodiment 3

[0037] First put the nickel foam (2cm*2cm*1.2cm) electrode into acetone for ultrasonic degreasing, then soak it in 0.5mol / L dilute sulfuric acid to remove surface oxides, then clean it with ultrasonic oscillation in distilled water, and finally use high Dry it with pure nitrogen and save it for later use.

[0038] Get a piece of cleaned foam nickel (2cm*2cm*1.2cm) and put it into 40ml 2mmol / L palladium chloride solution (the concentration of palladium chloride in the mixed solution), the ratio of the amount of palladium chloride and sodium chloride 1:100, reacted at 30°C for 2 hours in a shaker with a speed of 160 times / min, the light yellow color of the solution receded, took out the electrode and rinsed it gently with deionized water for 3 times, and dried it with nitrogen to prepare a flower-shaped nanometer The palladium / nickel foam catalytic electrode is used as the working electrode. The dechlorination reaction is an H-type three-electrode system: the prepared flower-sh...

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Abstract

The invention discloses a preparation method of a flower-like nano-palladium / foamed nickel electrocatalytic material and an application of the flower-like nano-palladium / foamed nickel electrocatalyticmaterial in electrocatalytic reduction dechlorination reaction. Foamed nickel serves as a substrate material, a palladium chloride solution serves as a reaction solution, and the flower-like nano-palladium / foamed nickel electro-catalytic material is prepared through a chemical replacement method. The preparation method comprises the steps: applying the prepared material to monochloroacetic acid and 2,4-dichlorphenoxyacetic acid, and dechlorinating; in an H-type three-electrode system, the prepared electrode material is used as a working electrode, platinum is used as a counter electrode, a saturated calomel electrode is used as a reference electrode, a cathode chamber solution of the system is a sodium salt solution, river water or tap water and monochloroacetic acid or 2,4-dichlorophenoxyacetic acid for dechlorination, an anode chamber solution is a sodium salt solution, river water or tap water, a dechlorination reaction is carried out for 1-3 h under a constant potential dechlorination method or a constant current dechlorination method, and the conversion rate of monochloroacetic acid or 2,4-dichlorophenoxyacetic acid reaches 90.0% or above. The preparation method has the characteristics that the preparation method of the electrode material is simple, the dechlorination efficiency is high, and the electrolyte solution of the dechlorination reaction is wide in source.

Description

technical field [0001] The invention belongs to the technical field of electrode material preparation, and in particular relates to a preparation method of a flower-shaped nano palladium / foam nickel catalytic material and its application in electrocatalytic reduction dechlorination reaction. Background technique [0002] Chlorine-containing organic substances refer to organic compounds in which hydrogen atoms in the molecular structure of organic substances are replaced by chlorine atoms, mainly including chlorinated aliphatic hydrocarbons, chlorinated aromatic hydrocarbons and their derivatives. In the 20th century, chlorinated organic compounds were mass-produced and widely used in agriculture, dyeing and finishing industry, chemical industry, biomedicine and electronics. Most of the chlorine-containing organic compounds are stable in nature, difficult to biodegrade in the natural environment, and accumulate in water, soil and organisms to a certain extent. At present, th...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J37/34B01J37/06C02F1/467C02F101/36
CPCB01J23/892B01J37/343B01J37/06C02F1/4676C02F2101/36B01J35/33B01J35/40
Inventor 宋爽蒋佳洪邢颖潘谦谦刘秋香
Owner ZHEJIANG UNIV OF TECH
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