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Electrocatalyst of MOFs (Metal-organic Frameworks)/graphene composite carrier and preparation method of electrocatalyst

A graphene composite, electrocatalyst technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Reunion and other problems, to achieve the effect of short time, not easy to agglomerate, and uniform distribution

Inactive Publication Date: 2013-06-26
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a catalyst with high dispersibility and a preparation method thereof, which overcomes the defects of the existing preparation methods such as cumbersome and time-consuming, difficult control of particle size and easy agglomeration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Disperse 100mg of graphene oxide into 100mL of deionized water, ultrasonically oscillate evenly, put 50mg of cobalt acetate and 20mg of terephthalic acid into the prepared dispersion, stir evenly, and then transfer the obtained dispersion into a hydrothermal kettle React at a temperature of 200°C for 42 hours. After the reaction is completed, filter with suction and wash with absolute ethanol and deionized water three times respectively to obtain a Co-containing MOFs / graphene composite support (the specific surface area is 2430.1m 2 / g).

[0019] Take 50 mg of the resulting composite carrier and 10 mL of 2 mM H 4 PtCl 6 The ethylene glycol solution was mixed, stirred evenly to form a uniform suspension, and reacted in a 1000w microwave oven for 5 minutes. After the reaction was completed, it was filtered with suction and washed 3 times with absolute ethanol and deionized water respectively to obtain Pt-based MOFs / Electrocatalysts on graphene composite supports.

Embodiment 2

[0021] Disperse 80mg of graphene oxide into 90mL of 2-methylpyrrolidone, ultrasonically oscillate evenly, 30mg of ferric chloride, 15mg of manganese acetate and 30mg of trimesic acid are successively placed in the prepared dispersion, stirred evenly, and then the obtained The dispersion liquid was transferred to a hydrothermal kettle and reacted at 120°C for 15 hours. After the reaction was completed, it was filtered with suction and washed three times with absolute ethanol and deionized water respectively to obtain a MOFs / graphene composite carrier containing Fe and Mn ( The specific surface area is 1459.3m 2 / g).

[0022] Get the resulting composite carrier 100mg and 30mL2mM PdCl 2 (NH 3 ) 2 Glycerol solution mixed, stirred evenly to form a uniform suspension, heated in a 1000w microwave oven for 10s and intermittently for 30s, after the reaction was completed, filtered with suction, washed 3 times with absolute ethanol and deionized water respectively, to obtain Electro...

Embodiment 3

[0024] Disperse 60mg of graphene oxide into 80mL of methanol, ultrasonically oscillate evenly, put 30mg of lanthanum nitrate, 10mg of cobalt acetate and 30mg of 2-amino terephthalic acid into the prepared dispersion, stir evenly, and then transfer the obtained dispersion into React in a hydrothermal kettle at a temperature of 70°C for 4 hours. After the reaction is completed, filter with suction and wash with absolute ethanol and deionized water three times respectively to obtain a MOFs / graphene composite support containing La and Co (specific surface area of ​​225.4m 2 / g).

[0025] Get the obtained composite carrier 100mg and 30mL concentration to be 2mM H 4 PtCl 6 , 0.2mM H 4 PtCl 6 The ethanol solution was mixed, stirred evenly to form a uniform suspension, and heated in a 1000w microwave oven for 20s and intermittently for 40s. After the reaction was completed, it was filtered with suction and washed 3 times with absolute ethanol and deionized water respectively to obt...

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Abstract

The invention discloses electrocatalyst of MOFs (Metal-organic Frameworks) / graphene composite carrier and a preparation method of the electrocatalyst. The electrocatalyst is composed of the MOFs / graphene composite carrier and an active component. The preparation method of the MOFs / graphene composite carrier comprises the following steps of: preparing MOFs / graphene composite carrier through a hydrothermal reaction method; and loading the active component on the composite carrier by adopting a microwave synthesis method. The preparation method disclosed by the invention is simple in preparation steps, short in time and small in product loss; and the prepared catalyst is small in grain size, unlikely to cluster, uniformly distributed and high in electrochemical catalytic activity.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a preparation method of a catalyst using MOFs / graphene as a composite carrier. Background technique [0002] At present, the commonly used oxygen reduction and oxygen evolution catalyst is Pt / C catalyst. Although this type of catalyst has good catalytic performance for oxygen reduction, the existing preparation method is complex and time-consuming, and the obtained nano-scale catalyst is easy to agglomerate. In recent years, although the research results of non-platinum catalysts are also very good, such as carbon-supported Pd-Co alloy catalysts, the catalytic activity is significantly improved compared with other non-platinum catalysts, but the activity is still lower than that of Pt-based catalysts. The main problem to be solved for Pt-based catalysts is to improve the specific mass activity of platinum-based catalysts. Therefore, appropriate preparation methods an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B01J31/22
CPCY02E60/50
Inventor 银凤翔王亮陈标华
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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