A kind of sea urchin-shaped copper-based catalyst and its preparation method and application

A copper-based catalyst and sea urchin-shaped technology, which is applied in the field of sea urchin-shaped copper-based catalysts and their preparation, can solve problems affecting the reaction of hydrogen and oxygen, fuel cell efficiency reduction, fuel cell electrode poisoning, etc., and achieve a simple and easy preparation method, reproducible results

Active Publication Date: 2021-10-22
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] For fuel cells using hydrogen as fuel, the hydrogen produced by low-carbon alcohols and hydrocarbons often contains about 5×10 5 -2×10 6 ppm (0.5-2%) of CO, the presence of CO will not only cause fuel cell electrode poisoning, but also compete with hydrogen, affect the reaction of hydrogen and oxygen, and ultimately lead to a significant reduction in the efficiency of the fuel cell, so it is necessary to CO removal within the

Method used

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  • A kind of sea urchin-shaped copper-based catalyst and its preparation method and application
  • A kind of sea urchin-shaped copper-based catalyst and its preparation method and application
  • A kind of sea urchin-shaped copper-based catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh 19.9gCu(NO 3 ) 2 and 5.9g of 50% Mn(NO 3 ) 2 The aqueous solution was mixed, and then 7.5ml of distilled water was added to the mixed solution and stirred until Cu(NO 3 ) 2 Dissolve completely to obtain copper-manganese mixed solution.

[0029] (2) Add 112.5gH to the copper-manganese mixture 2 0, 5.6gCTAB, 135.1g absolute ethanol, after stirring at room temperature for 15 minutes (stirring speed is 80-100r / min).

[0030] (3) Slowly add 29.7 g of ammonia water dropwise to the reaction mixture obtained in step (2). After the ammonia water is added dropwise, the mixture is stirred (250-350 r / min) at room temperature for 2 hours.

[0031] (4) The reaction mixture obtained in step (3) was transferred to a hydrothermal synthesis kettle for hydrothermal treatment, and the hydrothermal treatment was performed at 120° C. for 24 hours.

[0032] (5) After the hydrothermal treatment is completed, the solid is obtained by suction filtration, and the solid is washed ...

Embodiment 2-5 and comparative example 1-4

[0037] The difference between embodiment 2-5, comparative example 1-4 and embodiment 1 is that the amount of copper nitrate and manganese nitrate added in step (1) is different, resulting in different contents of Cu and Mn in the catalyst obtained finally, See Table 1 below for details.

[0038] Table 1

[0039]

[0040] in conclusion:

[0041] (1) See Comparative Examples 1-4, when the molar ratio of copper nitrate and manganese nitrate is not in the range of 0.5-1.65:1, the final copper-based catalyst is not sea urchin-like, and the CO oxidation temperature is 43-51 ℃, 50% CO removal temperature is 130-142 ℃, 100% CO removal temperature is 190-219 ℃, both of which are significantly higher than the relevant temperatures of Examples 1-5. In summary, we can conclude that the copper-based catalyst has The urchin-like structure helps to catalyze the conversion of O 2 CO, which is the oxidizing agent, is completely combusted.

[0042] (2) image 3 It is the X-ray diffracti...

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Abstract

The application of the present invention belongs to the technical field of metal oxide materials, and specifically discloses a sea urchin-shaped copper-based catalyst, which is a spherical sea urchin structure, and a plurality of outwardly diverging columns are formed on the spherical sea urchin. The invention also discloses a preparation method of the sea urchin-shaped copper-based catalyst. The present invention also provides the above-mentioned sea urchin-shaped copper-based catalyst in the presence of O 2 As an oxidant, it catalyzes the complete combustion of CO. The preparation method of the present invention is simple, and the prepared catalyst has a unique shape, and CO can be oxidized to CO at 30-40°C 2 .

Description

technical field [0001] The application of the present invention belongs to the technical field of metal oxide materials, and specifically discloses a sea urchin-shaped copper-based catalyst as well as its preparation method and application. Background technique [0002] For fuel cells using hydrogen as fuel, hydrogen produced from low-carbon alcohols and hydrocarbons often contains about 5×10 5 -2×10 6 ppm (0.5-2%) of CO, the presence of CO will not only cause fuel cell electrode poisoning, but also compete with hydrogen, affect the reaction of hydrogen and oxygen, and ultimately lead to a significant reduction in the efficiency of the fuel cell, so it is necessary to The CO inside is eliminated. Among various methods for CO elimination, CO elimination by catalytic combustion is a simple, cheap, and easy-to-implement method. [0003] Catalytic combustion is a technology that uses a catalyst to perform flameless combustion at a low light-off temperature, and oxidizes and d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J35/08B01J37/10C01B32/50
CPCB01J23/8892B01J35/08B01J37/10C01B32/50
Inventor 张海东陈佳熊昆申渝周玉凤
Owner CHONGQING TECH & BUSINESS UNIV
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