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Preparation method and application of carbon-loaded nickel catalyst

A catalyst and nickel-supported technology, which can be used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. The effect of high selectivity of hydrogen peroxide, convenient continuous production and simple process conditions

Active Publication Date: 2021-06-29
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the anthraquinone indirect method mainly used in the industrial production of hydrogen peroxide is through H 2 Under the action of Pd catalyst, the anthraquinone in the solvent is reduced to anthrahydroquinone, which is then oxidized by oxygen to generate H 2 o 2 , its production process is lengthy, the catalyst cost is high and accompanied by organic residues
Relatively speaking, the direct reaction of hydrogen and oxygen to produce hydrogen peroxide is greener, but because hydrogen peroxide is easily reduced to water, the requirements for catalysts are extremely stringent in order to achieve highly selective production of hydrogen peroxide

Method used

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  • Preparation method and application of carbon-loaded nickel catalyst
  • Preparation method and application of carbon-loaded nickel catalyst
  • Preparation method and application of carbon-loaded nickel catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Catalyst preparation

[0030] a. Precipitation deposition method: In the ethylene glycol solution containing metal organic framework structure (ZIF-8), add a certain concentration of sodium hydroxide aqueous solution, and then mix it with the ethylene glycol solution containing nickel nitrate, hydrothermal treatment, in ZIF A certain amount of nickel salt is deposited on the surface of -8.

[0031] b. After calcining the metal nickel salt deposited in step a at 900°C for 2 h in an argon atmosphere, a carbon-supported nickel catalyst was obtained (Ni / C-X, X represents the mass ratio of nickel nitrate to ZIF-8). Transmission electron microscopy results of the resulting product can be found in figure 1 , see the thermogravimetric spectrum figure 2 ;

[0032] Electrochemical performance test

[0033] Weigh 8 mg of the catalyst powder obtained by the method of the present invention, disperse it in 1000 uL of isopropanol aqueous solution containing 0.1% naphthol solution...

Embodiment 2

[0039] Catalyst preparation

[0040] a. Precipitation deposition method: In the ethylene glycol solution containing carbon black (XC-72), add a certain concentration of sodium hydroxide aqueous solution, then mix with the ethylene glycol solution containing nickel nitrate, hydrothermal treatment, on the surface of carbon black A certain amount of nickel salt was deposited by precipitation, and the mass ratio of nickel nitrate to carbon black was 8.

[0041] b. After calcining the metal nickel salt deposited in step a at 900°C for 2 h in an argon atmosphere, the carbon-supported nickel catalyst (Ni / XC-72) was obtained.

[0042] Electrochemical performance test

[0043] The test method is the same as in Example 1, except that the disc electrode of the ring-disk electrode is modified with Ni / XC-72, and the specific rotating ring-disk electrode is used to test the selectivity of hydrogen peroxide, see Figure 7 .

Embodiment 3

[0045] Catalyst preparation

[0046] a. Precipitation deposition method: In the ethylene glycol solution containing carbon black (XC-72), add a certain concentration of sodium hydroxide aqueous solution, then mix with the ethylene glycol solution containing nickel chloride, hydrothermal treatment, in the carbon black A certain amount of nickel salt was deposited on the surface, and the mass ratio of nickel chloride to carbon black was 8.

[0047] b. After calcining the metal nickel salt deposited in step a at 900°C for 2 h in an argon atmosphere, the carbon-supported nickel catalyst (Ni-2 / XC-72) was obtained.

[0048] Electrochemical performance test

[0049] The test method is the same as in Example 1, except that the disc electrode of the ring-disk electrode is modified with Ni-2 / XC-72, and the specific rotating ring-disk electrode is used to test the selectivity of hydrogen peroxide, see Figure 7 .

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Abstract

The invention discloses a preparation method of a carbon-loaded nickel catalyst. The preparation method comprises the following steps: 1) depositing a certain amount of metal salt on the surface of a carbon carrier or a precursor; and 2) roasting the carbon carrier or the precursor deposited with the metal salt in step 1) in an inert protective atmosphere for a certain time to obtain the carbon-loaded nickel catalyst. The method is simple and easy to implement and low in cost, shows excellent catalytic performance in a reaction for preparing hydrogen peroxide through electrochemical oxygen reduction, and has a very good industrial application prospect.

Description

technical field [0001] The invention relates to a preparation method and application of a carbon-supported nickel catalyst. Background technique [0002] Since the oxidation / reduction products are only oxygen and water, hydrogen peroxide (H 2 o 2 ) is considered to be the most environmentally friendly oxidizing agent. As a substitute for chlorine-containing bleaches and oxidants, it is widely used in industry, medicine, energy and environmental protection. Global H 2 o 2 The output is about 2.2 million tons per year, and its demand is growing steadily at a rate of 4% per year. With the rapid development of the national economy, in order to meet the development requirements of a sustainable green economy, the domestic market demand for hydrogen peroxide continues to rise. At present, the anthraquinone indirect method mainly used in the industrial production of hydrogen peroxide is through H 2 Under the action of Pd catalyst, the anthraquinone in the solvent is reduced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J37/03B01J37/10B01J37/08C25B1/30C25B11/091
CPCB01J23/755B01J37/031B01J37/10B01J37/082C25B1/30B01J35/33Y02E60/50
Inventor 杨明辉沈行加潘龙海
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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