Nitrogen-doped graphene loaded Pd/Co catalyst and preparation method thereof

A nitrogen-doped graphene and catalyst technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of dispersion, poor stability, catalytic activity to be improved, and composite catalysts are easy to agglomerate, so as to promote dispersion and desorption Accompanied by further reaction, the effect of strengthening the catalytic performance of oxygen reduction

Inactive Publication Date: 2016-09-28
郑叶芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Above-mentioned two kinds of graphene complex composite palladium catalysts and synthetic method thereof, although the method for having synthesis is simple and easy, the graphene composite palladium catalyst that makes has catalytic efficiency height, but still there is composite catalyst easy agglomeration, dispersibility, stability are relatively Poor disadvantages, and its catalytic activity needs to be improved

Method used

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  • Nitrogen-doped graphene loaded Pd/Co catalyst and preparation method thereof
  • Nitrogen-doped graphene loaded Pd/Co catalyst and preparation method thereof
  • Nitrogen-doped graphene loaded Pd/Co catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A nitrogen-doped graphene-supported Pd / Co catalyst is prepared from the following raw materials in parts by weight: Co(NO 3 ) 2 ·6H 2 100 parts of O, 200 parts of nitrogen-doped graphene, 1175 parts of potassium borohydride; also includes an appropriate amount of 0.05mol / L of PdCl 2 solution, so that the molar ratio of Pd to Co is 1:2;

[0036] Wherein, the nitrogen-doped graphene is obtained by the following method: 1 part by weight of graphene oxide is added to 1350 parts by weight of ammonia water, ultrasonically dispersed for 10 minutes to the ink state, and then 2700 parts by weight are added ammonia water, and moved into a hydrothermal reaction kettle of suitable size, so that the volume of the reactant was 2 / 3 of the volume of the hydrothermal reaction kettle, reacted at 200°C for 4.5 hours, cooled to room temperature after the reaction and washed with deionized water until the product was Ammonia-containing water, and then dried at 60°C to obtain nitrogen-doped...

Embodiment 2

[0043] A nitrogen-doped graphene-supported Pd / Co catalyst is prepared from the following raw materials in parts by weight: Co(NO 3 ) 2 ·6H 2 100 parts of O, 250 parts of nitrogen-doped graphene, 1250 parts of potassium borohydride; also includes an appropriate amount of 0.05mol / L of PdCl 2 solution, so that the molar ratio of Pd to Co is 2:1;

[0044] Wherein, the nitrogen-doped graphene is obtained by the following method: 1 part by weight of graphene oxide is added to ammonia water of 1400 parts by weight, ultrasonically dispersed for 15 minutes to the ink state, and then 2800 parts by weight are added ammonia water, and moved into a hydrothermal reactor of suitable size, so that the volume of the reactant was 2 / 3 of the volume of the hydrothermal reactor, reacted at 230°C for 5.5 hours, cooled to room temperature after the reaction and washed with deionized water until the product was Ammonia-containing water, then dried at 75°C to obtain nitrogen-doped graphene;

[004...

Embodiment 3

[0051] A nitrogen-doped graphene-supported Pd / Co catalyst is prepared from the following raw materials in parts by weight: Co(NO 3 ) 2 ·6H 2 100 parts of O, 227 parts of nitrogen-doped graphene, 1197 parts of potassium borohydride; also includes an appropriate amount of 0.05mol / L of PdCl 2 solution, so that the molar ratio of Pd to Co is 1:1;

[0052] Wherein, the nitrogen-doped graphene is obtained by the following method: 1 part by weight of graphene oxide is added to 1365 parts by weight of ammonia water, ultrasonically dispersed for 13 minutes to ink-like, and then 2730 parts by weight are added Ammonia, and moved into a suitable size hydrothermal reactor, so that the volume of the reactant is 2 / 3 of the volume of the hydrothermal reactor, reacted at 210 ° C for 5 hours, cooled to room temperature after the reaction and washed with deionized water until the product Ammonia-containing water, then dried at 70°C to obtain nitrogen-doped graphene;

[0053] Graphene oxide i...

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Abstract

The invention relates to the technical fields of catalysts and catalyst synthesis and particularly relates to a nitrogen-doped graphene loaded Pd/Co catalyst and a preparation method thereof. The nitrogen-doped graphene loaded Pd/Co catalyst is prepared from the following raw materials in parts by weight: 100 parts of Co( NO3 )2.6H2O, 200-250 parts of nitrogen-doped graphene, 1175-1250 parts of potassium borohydride and a proper amount of 0.05mol/L PdCl2 solution, wherein the molar ratio of Pd to Co is 2 to (1-4). The nitrogen-doped graphene loaded Pd/Co catalyst has the beneficial effects that (1) by virtue of nitrogen-doped graphene, the dispersity of a Pd/Co alloy catalyst can be promoted, Pd particles are uniformly distributed on a carrier, and particle sizes are uniform; and (2) the desorption and further reaction of oxide substances can be effectively promoted, so that the oxygen reduction catalysis of the catalyst is enhanced, and the performance and stability of the catalyst are improved.

Description

technical field [0001] The invention relates to the technical field of catalysts and catalyst synthesis, in particular to a nitrogen-doped graphene supported Pd / Co catalyst and a preparation method thereof. Background technique [0002] Catalyst is a kind of substance that can speed up the rate of chemical reaction without changing its own physical and chemical properties. Because it can speed up the reaction rate, the selection and synthesis of reaction catalysis in chemical reactions are widely focused. Due to the electronic arrangement characteristics on the surface of noble metal palladium atoms, it has become an important catalyst in chemical reactions. It has the advantages of high-efficiency catalytic performance, small size, and high surface activity, which has attracted the attention of researchers. The field of application is also expanding, with pivotal issues. However, due to the problems that the traditional nano-palladium catalyst is easy to lose and difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/90H01M4/88
CPCH01M4/88H01M4/9075H01M4/921H01M4/926Y02E60/50
Inventor 郑叶芳
Owner 郑叶芳
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