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Double-MOF connection structure nano composite electrocatalyst for proton membrane fuel cell and preparation method thereof

A technology of fuel cells and connection structures, applied in nanotechnology for materials and surface science, battery electrodes, nanotechnology, etc., can solve problems such as high cost and single synthesis cost of precursors

Active Publication Date: 2021-04-23
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the existing fuel cell catalysts and overcome the defects of the prior art. At present, fuel cell catalysts generally face the single obstacle of the precursor and the problem of synthesis cost, as well as the high cost and toxicity of Pt-based catalytic materials, etc. Defects; Based on the unique structure of ZIF-8@TA / ZIF-67@TA, a metal-organic framework nanocomposite for proton membrane fuel cells was developed, which has high onset potential, half-slope potential, and excellent limiting current As well as excellent stability and good methanol tolerance, it has the advantages of strong resistance to methanol poisoning

Method used

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  • Double-MOF connection structure nano composite electrocatalyst for proton membrane fuel cell and preparation method thereof
  • Double-MOF connection structure nano composite electrocatalyst for proton membrane fuel cell and preparation method thereof
  • Double-MOF connection structure nano composite electrocatalyst for proton membrane fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] This example shows a synthesis method of ZIF-8@TA / ZIF-67@TA catalyst.

[0069] (1) Dissolve 5.5 g of 2-methylimidazole in 20 mL of deionized water;

[0070] (2) Then weigh 0.45 g Co(NO 3 ) 2 ·6H 2 O dispersed it in 5 mL deionized water;

[0071] (3) Quickly pour the 2-methylimidazole solution into Co 2+ solution and stirred at room temperature for 6 hours. The resulting product was washed several times with ethanol and water, and dried to obtain ZIF-67 nanocrystals;

[0072] (4) Weigh 3.3 g of 2-methylimidazole and dissolve it in 70 mL of methanol solution;

[0073] (5) Weigh 1.5 g Zn(NO 3 ) 2 ·6H 2 O dispersed it in 70 mL of methanol solution;

[0074] (6) Quickly pour the 2-methylimidazole solution into the Zn2+ solution and stir at room temperature for 24 hours;

[0075] (7) The obtained product was washed with methanol solution and centrifuged, and finally dried to obtain ZIF-8 crystals;

[0076] (8) Disperse 300 mg of ZIF-8 nanocrystals in 10 mL of deio...

Embodiment 2

[0089] This example shows a study on the electrochemical performance of nanomaterials ZIF-8@TA / ZIF-67@TA as catalysts.

[0090] The invention uses a platinum electrode as a counter electrode, a saturated silver chloride electrode (Ag / AgCl) as a reference electrode, and a Pt / C electrode as a working electrode.

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Abstract

The invention discloses a double-MOF connection structure nano composite electrocatalyst for a proton membrane fuel cell, and the double-MOF nano composite electrocatalyst for the proton membrane fuel cell is characterized in that the active substance of the nano material is ZIF-8@ TA / ZIF-67@TA. The problems of an existing fuel cell catalyst are solved, the defects of the prior art are overcome, the problems that an existing fuel cell catalyst generally faces a single precursor and is low in synthesis cost are solved, and the defects that a Pt-based catalytic material is high in cost, toxic and the like are overcome. On the basis of a unique connecting structure of ZIF-8 and ZIF-67, the metal organic framework nano composite material for the proton membrane fuel cell is developed, and has the advantages of high initial potential, half-slope potential, excellent limiting current, excellent stability, good methanol tolerance, relatively strong methanol poisoning resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of proton membrane fuel cell catalysts, and in particular relates to a double MOF connection structure nanocomposite electrocatalyst for proton membrane fuel cells and a preparation method thereof. Background technique [0002] Proton membrane fuel cell (PEMFC) has the characteristics of high specific energy, low temperature fast start, convenient operation, high smooth operation and green environmental protection, etc. It is considered to be an ideal source of power to replace internal combustion engines, and is used in national defense, aerospace, communications, portable power, New energy vehicles and other aspects have attracted the attention of extensive scholars. At present, PEMFC is still facing problems such as high cost and short life, which make it impossible to achieve wide application, which limits the further development of PEMFC in the industrialization process. In order to improve the perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y40/00B82Y30/00
CPCH01M4/9075H01M4/9041B82Y30/00B82Y40/00Y02E60/50
Inventor 肖高张梦瑶
Owner FUZHOU UNIV
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