Method for preparing low Pt loading capacity type fuel battery catalyst by utilizing MOF as template

A technology for fuel cells and catalysts, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as restricting applications, and achieve the effects of reducing growth and movement, slowing migration and agglomeration, and improving mass activity.

Active Publication Date: 2018-08-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although non-noble metal catalysts have high activity and certain stability, there is still a certain gap between the ORR performance of general non-noble metal electrocatalysts and Pt-based catalysts in acidic working environments, which limits the performance of non-noble metal electrocatalysts in acidic environments. Applications

Method used

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  • Method for preparing low Pt loading capacity type fuel battery catalyst by utilizing MOF as template
  • Method for preparing low Pt loading capacity type fuel battery catalyst by utilizing MOF as template
  • Method for preparing low Pt loading capacity type fuel battery catalyst by utilizing MOF as template

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Effect test

Embodiment 1

[0031] A kind of preparation method of the fuel cell catalyst with low Pt loading of MOF as template, comprises the following steps:

[0032] Step 1) Preparation of MOF template: Cobalt nitrate, 2-aminoterephthalic acid and triethylenediamine (concentration ratio=1:0.7:0.7) were dispersed in N,N-dimethylformamide (DMF) to form MOF precursor mixed solution, transfer the above mixed solution to a high-pressure reactor, and use the solvothermal method to stand in an oven at 110-130°C for 24-48 hours, then collect the MOF crystal precipitate, and centrifuge and wash the MOF precipitate three to five times. Vacuum drying to obtain MOF powder for later use;

[0033] Step 2) Pt loading on MOF template: Add MOF powder to 0.01-0.2mol / L sodium chloroplatinate ethanol solution and stir for 20-60min, then let it stand at 0-10℃ for 24h, take it out, and wash it by centrifugation for three After five times, the MOF material impregnated with Pt was obtained by vacuum drying;

[0034] Step ...

Embodiment 2

[0040] A kind of preparation method of the fuel cell catalyst with low Pt loading of MOF as template, comprises the following steps:

[0041] Step 1) Preparation of MOF template: Cobalt nitrate, 2-aminoterephthalic acid and triethylenediamine (concentration ratio=1:1:0.5) were dispersed in N,N-dimethylformamide (DMF) to form MOF precursor mixed solution, transfer the above mixed solution to a high-pressure reactor, and use the solvothermal method to stand in an oven at 110-130°C for 24-48 hours, then collect the MOF crystal precipitate, and centrifuge and wash the MOF precipitate three to five times. Vacuum drying to obtain MOF powder for later use;

[0042] Step 2) Pt loading on MOF template: Add MOF powder to 0.01-0.2mol / L sodium chloroplatinate ethanol solution and stir for 20-60min, then let it stand at 0-10℃ for 24h, take it out, and wash it by centrifugation for three After five times, vacuum dry for later use;

[0043] Step 3) Preparation of catalyst with low Pt loadi...

Embodiment 3

[0045] A kind of preparation method of the fuel cell catalyst with low Pt loading of MOF as template, comprises the following steps:

[0046] Step 1) Preparation of MOF template: Cobalt nitrate, 2-aminoterephthalic acid and triethylenediamine (concentration ratio=1:1:0.7) were dispersed in N,N-dimethylformamide (DMF) to form MOF precursor mixed solution, transfer the above mixed solution to a high-pressure reactor, and use the solvothermal method to stand in an oven at 110-130°C for 24-48 hours, then collect the MOF crystal precipitate, and centrifuge and wash the MOF precipitate three to five times. Vacuum drying to obtain MOF powder for later use;

[0047] Step 2) Pt loading on MOF template: Add MOF powder to 0.01-0.2mol / L sodium chloroplatinate ethanol solution and stir for 20-60min, then let it stand at 0-10℃ for 24h, take it out, and wash it by centrifugation for three After five times, vacuum dry for later use.

[0048] Step 3) Preparation of catalysts with low Pt load...

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Abstract

The invention relates to a method for preparing a low Pt loading capacity type fuel battery catalyst by utilizing MOF as a template. The method comprises the following steps: dispersing cobalt nitrate, 2-aminoterephthalic acid and triethylene diamine in N,N-dimethyl formamide to obtain an MOF precursor mixing solution; preparing MOF according to a solvent heating method; washing; drying to obtainMOF powder; adding to a sodium chloroplatinate or chloroplatinic acid solution; stirring; dissolving; allowing standing still; washing; drying; performing high-temperature treatment and pickling underinsert atmosphere; centrifugally washing and drying the product; grinding to obtain the low Pt loading capacity type fuel battery catalyst. The method has the following advantages and beneficial effects: the Pt content in the catalyst is obviously decreased, so that the problem of high cost of the catalyst of a current fuel battery can be solved; low Pt loading capacity type catalyst is outstanding in catalyzing activity; the quality activity of the Ptd is increased by 2-5 times when being compared with that of the conventional commercial Pt / C catalyst.

Description

technical field [0001] The invention relates to the field of fuel cell catalysts, in particular to a method for preparing a low-Pt-loaded fuel cell catalyst using MOF as a template. Background technique [0002] Hydrogen fuel cell is the use of hydrogen and fuel cells to generate electricity. As a true zero-pollution, zero-emission energy conversion tool, it is an inevitable direction for future new energy vehicles. Fuel cells not only have broad application prospects in automobiles and other vehicles, but also will be widely used in our daily life. Although there is still a long way to go before the maturity and large-scale popularization and application of fuel cell technology, there are reasons to believe that new energy fuel cell technology will bring earth-shaking changes to our social and economic life in the near future. [0003] The study of efficient and low-cost cathodic oxygen reduction (ORR) electrocatalysts in the development of fuel cells has been a long-stand...

Claims

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Application Information

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IPC IPC(8): H01M4/92B82Y30/00
CPCB82Y30/00H01M4/926Y02E60/50
Inventor 郭伟邢以晶李赏朱从懿潘牧
Owner WUHAN UNIV OF TECH
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