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A kind of supported bifunctional catalytic composite material and its preparation method

A technology of bifunctional catalysis and composite materials, which is applied in the field of supported bifunctional catalysis composite materials and its preparation, can solve the problems of uneven particle size, low stability, and limited applications, and achieve the benefits of electrochemical catalysis Activity and photocatalytic activity, promotion of adsorption and charge transfer rate, effects of achieving uniform distribution and position regulation

Active Publication Date: 2022-03-25
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are some shortcomings in the nanomaterials prepared by these methods, such as the inhomogeneous shape and particle size of the loaded particles, the particles are easy to agglomerate, the conductivity is low, the activity is not good, and the stability is not high. These shortcomings greatly limit the their application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] At room temperature, weigh 0.001g of carboxylated graphene, 0.2g of deionized water, 0.02g of aniline and 1mL of hydrochloric acid with a concentration of 0.1g / mL, mix them, ultrasonically disperse them for 0.5h, and add 1mL of A mixture of ammonium persulfate and 1 mL of hydrochloric acid with a concentration of 0.1 g / mL was stirred for 12 hours, centrifuged, washed with 100 mL of deionized water, and dried in vacuum at 50°C for 8 hours to obtain GO / polyaniline;

[0032]Add 0.1g GO / polyaniline to 500mL aqueous solution containing 1g copper nitrate hexahydrate, 0.2g 2,5-dihydroxyterephthalic acid and 0.5g pyrazine, adjust with 0.5g / mL sodium hydroxide aqueous solution The pH of the solution was raised to 10, the temperature was raised to 150°C, stirred for 6 hours, filtered, washed with 50mL deionized water and 50mL ethanol respectively, and vacuum-dried at 60°C for 10h to obtain GO / polyaniline / Cu-MOF;

[0033] Add 0.1g GO / polyaniline / Cu-MOF to 5mL aqueous solution cont...

Embodiment 2

[0038] At room temperature, weigh 0.001g of carboxylated graphene, 0.4g of deionized water, 0.05g of aniline and 1mL of hydrochloric acid with a concentration of 0.1g / mL, mix them, ultrasonically disperse them for 0.5h, and add 1mL of A mixture of ammonium persulfate and 1 mL of hydrochloric acid with a concentration of 0.1 g / mL was stirred for 12 hours, centrifuged, washed with 100 mL of deionized water, and dried in vacuum at 50°C for 8 hours to obtain GO / polyaniline;

[0039] Add 0.1g GO / polyaniline to 500mL aqueous solution containing 1g copper nitrate hexahydrate, 0.1g 2,5-dihydroxyterephthalic acid and 1g pyrazine, adjust the solution with 0.5g / mL sodium hydroxide aqueous solution pH to 10, heated to 150°C, stirred for 6h, filtered, washed with 50mL deionized water and 50mL ethanol respectively, and vacuum dried at 60°C for 10h to obtain GO / polyaniline / Cu-MOF;

[0040] Add 0.1g GO / polyaniline / Cu-MOF to 5mL aqueous solution containing 0.1g cobalt chloride hexahydrate, 0.1...

Embodiment 3

[0045] At room temperature, weigh 0.001g of carboxylated graphene, 0.5g of deionized water, 0.05g of aniline and 2mL of hydrochloric acid with a concentration of 0.1g / mL, mix them, ultrasonically disperse them for 0.5h, and add 2mL of A mixture of ammonium persulfate and 1 mL of hydrochloric acid with a concentration of 0.1 g / mL was stirred for 12 hours, centrifuged, washed with 100 mL of deionized water, and dried in vacuum at 50°C for 8 hours to obtain GO / polyaniline;

[0046] Add 0.1g GO / polyaniline to 500mL aqueous solution containing 1g copper nitrate hexahydrate, 1g 2,5-dihydroxyterephthalic acid and 1g pyrazine, adjust the concentration of the solution with 0.5g / mL sodium hydroxide aqueous solution pH to 10, heat up to 150°C, stir and react for 6h, filter, wash with 50mL deionized water and 50mL ethanol respectively, and vacuum dry at 80°C for 10h to obtain GO / polyaniline / Cu-MOF;

[0047] Add 0.1g GO / polyaniline / Cu-MOF to 5mL aqueous solution containing 0.5g cobalt chlo...

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Abstract

The invention relates to a supported dual-functional catalytic composite material and a preparation method thereof. The carrier of the material is nitrogen-doped porous carbon modified reduced graphene oxide, and a combination of iron ferric oxide nanoparticles and binary sulfide is used as a dual catalyst. Functionally active loads, in which the binary sulfide is CuS‑Co3S4 compound; the material is obtained by sulfidation and high-temperature carbonization of the copper-based metal organic framework / ZIF‑67 compound in an inert atmosphere. The body is a combination of 2,5-dihydroxyterephthalic acid and pyrazine. The invention solves the problem of dispersion of metal particles, and has strong catalytic activity, high thermal stability and excellent catalytic reaction selectivity.

Description

technical field [0001] The invention relates to the field of heterogeneous catalytic materials, in particular to a supported bifunctional catalytic composite material and a preparation method thereof. Background technique [0002] On the road to solving energy and environmental problems, hydrogen production by electrolysis of water is an efficient and clean advanced technology, which has the advantages of high conversion efficiency, simple process, no pollution, and high purity of hydrogen produced. Studies have shown that noble metal platinum-based materials are excellent catalysts for the hydrogen evolution reaction (HER), while RuO 2 and IrO 2 It exhibits excellent performance in oxygen evolution reaction (OER). However, the large-scale utilization of these catalysts is limited due to the low abundance and high cost of noble metals. Therefore, the development of highly efficient and stable non-noble metal bifunctional electrocatalysts, including carbides, oxides, sulfi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J27/043B01J35/10C25B1/04C25B11/054C25B11/069C25B11/065C25B11/091
CPCB01J27/24B01J27/043B01J35/0033B01J35/004B01J35/0073B01J35/1019C25B1/04C25B11/091Y02E60/36
Inventor 张泽武李诗佳戴逸凡吴芷漪史皓峻杨云峰
Owner NANJING INST OF TECH
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