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Application of metallic organic framework compound hollow microballoon loaded with iron cobalt sulfide

A technology of metal-organic frameworks and compounds, applied in the application of hollow microspheres of metal-organic framework compounds, and in the field of fuel cell ORR catalysts, can solve the problems of expensive Pt catalysts, slow cathode reaction kinetics, etc., and achieve excellent electrons and reduction products Transmission performance, reactivity, many attachment points, and excellent catalytic effect

Active Publication Date: 2019-04-19
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the kinetic process of the cathode reaction is extremely slow, and the current commercial Pt catalyst is expensive, which has become one of the bottlenecks for the large-scale use of fuel cells.

Method used

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  • Application of metallic organic framework compound hollow microballoon loaded with iron cobalt sulfide
  • Application of metallic organic framework compound hollow microballoon loaded with iron cobalt sulfide
  • Application of metallic organic framework compound hollow microballoon loaded with iron cobalt sulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] PS microspheres can be purchased directly or prepared by yourself. This example will provide a preparation method of PS microspheres, of course, the preparation method of PS microspheres is not limited to this.

[0048] The steps of PS microspheres in the present embodiment are as follows:

[0049] (1) Dissolve 0.3 g of SDS in 180 ml of deionized water to obtain an SDS solution, place the SDS solution in a three-necked flask, and pass nitrogen through the SDS solution to remove the polymerization inhibitor in the SDS.

[0050] (2) The temperature of the SDS solution in the three-necked bottle was raised to 80°C, and under reflux, the KPS aqueous solution was quickly dropped into the three-necked bottle, and the reaction was continued for 15 minutes. The KPS aqueous solution dropped was obtained by adding 0.3 g of KPS to 15 ml of deionized water.

[0051] (3) Slowly add the mixture of styrene monomer and n-butanol dropwise into the three-necked flask, and react for 30 m...

Embodiment 2

[0062] This example will provide a synthesis example of MOF derivative 1-1-ZIF@PS, the steps are as follows:

[0063] (1) In a three-neck flask, disperse 0.27g of PS microspheres in 5ml of deionized water and 20ml of ethanol, control the temperature at 30°C, and mechanically stir until uniformly dispersed. The resulting dispersion is designated as dispersion A.

[0064] (2) 0.78g of FeCl 3 and 1.142g of CoCl 2 ·6H 2 O was uniformly dispersed in 15ml of ethanol, and the resulting dispersion was designated as dispersion B.

[0065] (3) 2.362 g of 2-methylimidazole was dissolved in 25 ml of ethanol, and the resulting solution was designated as solution C.

[0066] (4) Slowly add the dispersion B to the dispersion A, the mixture in the three-necked bottle quickly turns brownish blue, and stir the mixture vigorously for 30 minutes.

[0067] (5) Add solution C into the three-necked bottle at one time, at this time, the mixed solution in the three-necked bottle quickly turns brow...

Embodiment 3

[0070] This example will provide a synthesis example of MOF derivative 1-2-ZIF@PS, the steps are as follows:

[0071] (1) In a three-necked flask, disperse 1.08 g of PS microspheres in 10 ml of deionized water and 50 ml of ethanol, control the temperature at 30°C, and mechanically stir until uniformly dispersed. The resulting dispersion is designated as dispersion A.

[0072] (2) 1.04g of FeCl 3 and 3.05g of CoCl 2 ·6H 2 O was evenly dispersed in 45ml of ethanol, and the resulting dispersion was designated as dispersion B.

[0073] (3) 9.448 g of 2-methylimidazole was dissolved in 80 ml of ethanol, and the resulting solution was designated as solution C.

[0074] (4) Slowly add the dispersion B to the dispersion A, the mixture in the three-necked bottle quickly turns brownish blue, and stir the mixture vigorously for 30 minutes.

[0075] (5) Add solution C into the three-necked bottle at one time, at this time, the mixed solution in the three-necked bottle quickly turns br...

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Abstract

The invention discloses an application of a metallic organic framework compound hollow microballoon loaded with an iron cobalt sulfide. The metallic organic framework compound hollow microballoon is applied to a fuel cell ORR catalyst for catalyzing the oxygen reduction reaction of a cathode. The metallic organic framework compound is prepared by a preparation method. The preparation method includes the steps: (1) providing polystyrene nano microballoons; (2) loading MOF derivatives with Fe and Co as metal ion centers on the polystyrene nano microballoons, ie, precursors; (3) performing high temperature carbonization on the precursors by calcining, so as to remove the polystyrene nano microballoons; and (4) performing sulfur doping on the carbonized product. The metallic organic frameworkcompound hollow microballoon has excellent electrocatalytic activity and can be used as a fuel cell ORR electrocatalyst. The optimal limited diffusion current density of the metallic organic frameworkcompound hollow microballoon is 4.1 mA / cm<-2>, and is close to the theoretical limited diffusion current density of platinum carbon of noble metal catalyst is 6 mA / cm<-2>, while the cost is lower.

Description

technical field [0001] The invention belongs to the application technical field of metal organic framework compound (MOF) derivatives, in particular to the application of metal organic framework compound hollow microspheres loaded with iron cobalt sulfide, which can be applied to fuel cell ORR catalysts. Background technique [0002] A fuel cell is an environmentally friendly and efficient new energy source, which consists of two half-reactions of fuel oxidation at the anode and oxygen reduction at the cathode. The oxidation reaction rate is far greater than the reduction reaction rate, so it is particularly important to increase the oxygen reduction reaction rate at the cathode. However, the kinetic process of the cathode reaction is extremely slow, and the current commercial Pt catalyst is expensive, which has become one of the bottlenecks for the large-scale use of fuel cells. Studies have shown that the Pt catalyst used in the fuel cell cathode accounts for about 40% of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/9083Y02E60/50
Inventor 韩午丽王凯佩高宇
Owner YANGTZE UNIVERSITY
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