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Manganese-cobalt spinel catalyst and preparation method thereof

A spinel and catalyst technology, applied in the field of manganese-cobalt spinel catalyst and its preparation, can solve the problems of difficult reaction mechanism of manganese oxide, limit the application of manganese oxide, unstable catalytic performance, etc., and achieve good industrial value, Improve the oxygen reduction catalytic performance and conductivity, and realize the effect of industrial production

Inactive Publication Date: 2018-10-12
YUNNAN ALUMINUM
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  • Abstract
  • Description
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Problems solved by technology

[0002] The best catalytic performance of oxygen reduction catalysts should be platinum and noble metal catalysts, but they are expensive; the catalytic performance of perovskite composite catalysts and transition metal chelate catalysts is unstable, the preparation process is complicated and the cost is high; the preparation of pure Manganese oxides are generally difficult and the complexity of the reaction mechanism of oxygen limits the application of manganese oxides

Method used

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  • Manganese-cobalt spinel catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) At room temperature, manganese salt and cobalt salt are mixed and subjected to the first grinding treatment to obtain mixed salt powder. Wherein, the manganese salt is manganese sulfate, the cobalt salt is cobalt sulfate, and the molar ratio of manganese ions in the manganese salt to cobalt ions in the cobalt salt is 2:1.

[0054] (2) The mixed salt powder and microporous ceramics (ZrO 2 -Al 2 o 3 -SiO 2 ), the diluent (glucose) and water are mixed for the second grinding treatment, and when the mixed solution changes from thin to thick, it is aged to obtain a compound intermediate. Among them, the molar ratio of the microporous ceramics to the sum of manganese ions and cobalt ions in the mixed salt powder is 2:1, the diluent is 10% of the mass sum of manganese ions and cobalt ions in the mixed salt powder, and the aging is carried out at 60°C for 12h Finish.

[0055] (3) Perform drying treatment on the compound intermediate to obtain a precursor, and the dryin...

Embodiment 2

[0058] (1) At room temperature, manganese salt and cobalt salt are mixed and subjected to the first grinding treatment to obtain mixed salt powder. Wherein, the manganese salt is manganese chloride, the cobalt salt is cobalt chloride, and the molar ratio of manganese ions in the manganese salt to cobalt ions in the cobalt salt is 2:1.

[0059] (2) The mixed salt powder and microporous ceramics (ZrO 2 -ZnO-SiO 2 ), the diluent (polyvinyl alcohol) and water are mixed for the second grinding treatment, and when the mixed solution changes from thin to thick, it is aged to obtain a compound intermediate. Among them, the molar ratio of the microporous ceramics to the sum of manganese ions and cobalt ions in the mixed salt powder is 2:1, the diluent is 12% of the mass sum of manganese ions and cobalt ions in the mixed salt powder, and the aging is carried out at 70°C for 10h Finish.

[0060](3) Perform drying treatment on the compound intermediate to obtain a precursor, and the dr...

Embodiment 3

[0063] (1) At room temperature, manganese salt and cobalt salt are mixed and subjected to the first grinding treatment to obtain mixed salt powder. Wherein, the manganese salt is manganese oxalate, the cobalt salt is cobalt oxalate, and the molar ratio of manganese ions in the manganese salt to cobalt ions in the cobalt salt is 2:1.

[0064] (2) The mixed salt powder and microporous ceramics (ZrO 2 -Al 2 o 3 -TiO 2 ), the diluent (citric acid) and water are mixed for the second grinding treatment, and when the mixed solution changes from thin to thick, it is aged to obtain the compound intermediate. Among them, the molar ratio of the microporous ceramics to the sum of manganese ions and cobalt ions in the mixed salt powder is 2:1, the diluent is 18% of the mass sum of manganese ions and cobalt ions in the mixed salt powder, and the aging is carried out at 50°C for 12h Finish.

[0065] (3) Perform drying treatment on the compound intermediate to obtain a precursor, and the...

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Abstract

The invention discloses a manganese-cobalt spinel catalyst and a preparation method thereof. The manganese-cobalt spinel catalyst adopts manganese-cobalt spinel as an active component and microporousceramic as a carrier. The manganese-cobalt spinel catalyst not only has excellent mechanical strength, high-temperature resistance, alkali corrosion resistance and good storage stability, but also hasgood catalytic activity in oxygen reduction catalysis.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular, the invention relates to a manganese-cobalt spinel catalyst and a preparation method thereof. Background technique [0002] The best catalytic performance of oxygen reduction catalysts should be platinum and noble metal catalysts, but they are expensive; the catalytic performance of perovskite composite catalysts and transition metal chelate catalysts is unstable, the preparation process is complicated and the cost is high; the preparation of pure Manganese oxides are generally difficult and the complexity of the reaction mechanism of oxygen limits the application of manganese oxides. Therefore, the existing oxygen reduction catalysts need to be further improved. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an object of the present invention is to propose a manganese-coba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J35/10
CPCB01J23/005B01J23/8892B01J35/61
Inventor 施学金汪云华田永周燕张战胜李如飞崔涛和晓才祁云一袁野杨孟昌
Owner YUNNAN ALUMINUM
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