Nanocomposite electrocatalyst with double mof connection structure for proton membrane fuel cell and preparation method thereof

A fuel cell and nanocomposite technology, applied in nanotechnology for materials and surface science, battery electrodes, structural parts, etc., can solve the problems of single synthesis cost and high cost of precursors, achieve excellent limit current, simple equipment, The effect of good methanol tolerance

Active Publication Date: 2022-03-15
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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  • Nanocomposite electrocatalyst with double mof connection structure for proton membrane fuel cell and preparation method thereof
  • Nanocomposite electrocatalyst with double mof connection structure for proton membrane fuel cell and preparation method thereof
  • Nanocomposite electrocatalyst with double mof connection structure for proton membrane fuel cell and preparation method thereof

Examples

Experimental program
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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 disperse 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 deion...

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 nanocomposite electrocatalyst for a proton membrane fuel cell. The double MOF nanomaterial catalyst of the proton membrane fuel cell, the nanomaterial active substance is ZIF‑8@TA / ZIF‑67@TA . Solve the problems existing in the existing fuel cell catalysts and overcome the defects of the prior art. At present, the fuel cell catalysts generally face the single obstacle of the precursor and the problem of synthesis cost, as well as the defects of high cost and toxicity of Pt-based catalytic materials; based on ZIF‑ 8 and ZIF‑67 unique connection structure, developed a metal organic framework nanocomposite material for proton membrane fuel cells, which has high onset potential, half-slope potential, excellent limiting current and excellent stability and very good Methanol tolerance, strong resistance to methanol poisoning and other advantages.

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 Patents(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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