Porous dual-metal hydroxide catalyst for electric catalysis of alcohol selective oxidation and preparation method and application thereof

A hydroxide and catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problem of insufficient electrode specific surface area and low electrocatalytic oxidation performance , limited effective catalytic area, etc., to achieve the effect of improving catalytic activity and stability, broad application prospects, and low cost

Inactive Publication Date: 2019-05-21
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​the electrode used for the electrocatalytic oxidation of alcohols is not large enough, and the effective catalytic area is limited, so that the electrocatalytic oxidation performance of the catalytic electrode for alcohols is low, and the Faraday efficiency is low.

Method used

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  • Porous dual-metal hydroxide catalyst for electric catalysis of alcohol selective oxidation and preparation method and application thereof
  • Porous dual-metal hydroxide catalyst for electric catalysis of alcohol selective oxidation and preparation method and application thereof
  • Porous dual-metal hydroxide catalyst for electric catalysis of alcohol selective oxidation and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Porous Ni 0.75 Fe 0.75 (OH) x Synthesis of / CF

[0031] 1) The carbon cloth (4cm×2cm) was ultrasonicated for 30 min in acetone, absolute ethanol, deionized water, and aqueous nitric acid solution (4mol / L nitric acid concentration) in order to remove impurities on the surface of the carbon cloth substrate. Then take out the carbon cloth and rinse the nitric acid on the carbon cloth with deionized water, and finally dry it in vacuum at 60°C to obtain the pretreated carbon cloth for subsequent use;

[0032] 2) Weigh 218.25mg of nickel nitrate, 303.01mg of ferric nitrate and 450mg of urea into 40mL of distilled water, and ultrasonically disperse them evenly for 30 minutes to obtain a precursor solution;

[0033] 3) Add the precursor solution obtained in step 2) and the pretreated carbon cloth (4cm×2cm) obtained in step 1) into the hydrothermal kettle, and raise the temperature to 120°C under microwave radiation (put the hydrothermal kettle in the microwave de...

Embodiment 2

[0036] Example 2: Porous Ni 0.75 Cu 0.75 (OH) x Synthesis of / CF

[0037] 1) Sonicate the carbon cloth (4cm×2cm) in acetone, absolute ethanol, deionized water, and nitric acid aqueous solution (nitric acid concentration is 4mol / L) for 30min in order to remove impurities on the surface of the carbon cloth substrate. Then take out the carbon cloth and rinse the nitric acid on the carbon cloth with deionized water, and finally dry it in vacuum at 60°C to obtain the pretreated carbon cloth for subsequent use;

[0038] 2) Weigh 218.25 mg of nickel nitrate, 181.2 mg of copper nitrate and 450 mg of urea into 40 mL of distilled water, and ultrasonically disperse them evenly for 30 minutes to obtain a precursor solution;

[0039] 3) Add the precursor solution obtained in step 2) and the pretreated carbon cloth (4cm×2cm) obtained in step 1) into the hydrothermal kettle, and raise the temperature to 120°C under microwave radiation (put the hydrothermal kettle in the microwave device)...

Embodiment 3

[0042] Embodiment 3: Porous Ni 0.75 co 0.75 (OH) x Synthesis of / CF

[0043] 1) Sonicate the carbon cloth (4cm×2cm) in acetone, absolute ethanol, deionized water, and nitric acid aqueous solution (nitric acid concentration is 4mol / L) for 30min in order to remove impurities on the surface of the carbon cloth substrate. Then take out the carbon cloth and rinse the nitric acid on the carbon cloth with deionized water, and finally dry it in vacuum at 60°C to obtain the pretreated carbon cloth for subsequent use;

[0044] 2) Weigh 218.25 mg of nickel nitrate, 218.25 mg of cobalt nitrate and 450 mg of urea into 40 mL of distilled water, and ultrasonically disperse them evenly for 30 minutes to obtain a precursor solution;

[0045] 3) Add the precursor solution obtained in step 2) and the pretreated carbon cloth (4cm×2cm) obtained in step 1) into the hydrothermal kettle, and raise the temperature to 120°C under microwave radiation (put the hydrothermal kettle in the microwave dev...

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Abstract

The invention discloses a porous dual-metal hydroxide catalyst for electric catalysis of alcohol selective oxidation and a preparation method and application thereof. The preparation method of the porous dual-metal hydroxide catalyst comprises the steps that nickel salt, metal M salt (metal M is iron or cobalt or copper) and urea are adopted as raw materials, water is adopted as a solvent, a carbon fabric is adopted as a substate, a nickel-metal M composite hydroxide is loaded on the surface of the carbon fabric substrate through a microwave synthesis method, drying is performed, and finally,the catalyst is placed into a plasma reaction furnace to be activated, and finally the porous dual-metal hydroxide catalyst is obtained. The catalyst has the porous structure, the large specific surface area and the good conductivity, and has the excellent performance in the alcohol selective electro-catalysis oxidation reaction. Meanwhile, the technology for preparing aldehyde or acid through thealcohol selectivity electro-catalysis oxidation reaction is easy to implement, the selectivity of the product aldehyde or acid is high, and the catalyst is low in preparation cost and high in stability and has the good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a porous double metal hydroxide catalyst for electrocatalytic selective oxidation of alcohols, a preparation method and application thereof. Background technique [0002] With the development of the economy, the shortage of petroleum resources has not only brought an energy crisis to human beings, but also led to the shortage of various chemical raw materials in life. Therefore, seeking sustainable alternatives to chemical raw materials is an important goal at present. . Oxidation of alcohols is one of the important ways to prepare aldehydes or acids, which are necessary raw materials and intermediates in the fields of medicine, specialty chemicals and fine chemicals. Therefore, the synthesis of aldehydes or acids by oxidation of alcohols is expected to provide abundant raw materials for chemical production. However, an efficient, environmentally friendly, and pra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J37/10B01J37/34B01J35/10C25B3/02C25B11/06C25B11/03C25B3/23
Inventor 钟兴陈先朗王建国
Owner ZHEJIANG UNIV OF TECH
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