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Preparation method of plant polyphenol-modified supramolecular network framework structure manganese-based nanocomposite electrocatalyst

A plant polyphenol, network framework technology, applied in nanotechnology, structural parts, nanotechnology and other directions for materials and surface science, can solve the problems of toxicity, single synthesis cost of precursors, high cost, and achieve simple equipment, The effect of excellent limiting current and good methanol tolerance

Active Publication Date: 2022-07-05
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, a metal-organic framework nanocomposite for proton membrane fuel cells has been developed, which has high onset potential, half-slope potential, excellent limiting current, excellent stability and very good Methanol tolerance, strong resistance to methanol poisoning and other advantages

Method used

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  • Preparation method of plant polyphenol-modified supramolecular network framework structure manganese-based nanocomposite electrocatalyst
  • Preparation method of plant polyphenol-modified supramolecular network framework structure manganese-based nanocomposite electrocatalyst
  • Preparation method of plant polyphenol-modified supramolecular network framework structure manganese-based nanocomposite electrocatalyst

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Effect test

Embodiment 1

[0069] The present embodiment shows a method for synthesizing a ZIF-8@TA-Mn catalyst, comprising the following steps:

[0070] (1) Weigh 3.3 g of 2-methylimidazole and dissolve it in 70 mL of methanol solution to obtain a 2-methylimidazole solution;

[0071] (2) Weigh 1.5 g Zn(NO 3 ) 2 ·6H 2 O was dispersed in 70 mL methanol solution to obtain Zn 2+ solution;

[0072] (3) Quickly pour 2-methylimidazole solution into Zn 2+ solution and stirred at room temperature;

[0073] (4) Wash the obtained product with methanol solution and centrifuge, and obtain ZIF-8 nanocrystals after drying;

[0074] (5) Disperse 200 mg of ZIF-8 nanocrystals in 10 mL of deionized water and sonicate for 5 min to obtain ZIF-8 200 solution;

[0075] (6) Adjust the pH of the TA solution (12 mM, 6 mL) to 7.5 with the prepared KOH (6 M) solution;

[0076] (7) Pour the adjusted TA solution into the ZIF-8 solution, and obtain ZIF-8 after sonicating for 30 min 200 @TASolution;

[0077] (8) Weigh 200...

Embodiment 2

[0110] This example demonstrates the electrochemical performance study of a nanomaterial ZIF-8@TA-Mn as a catalyst.

[0111] The present 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 relates to a preparation method of a plant polyphenol-modified supramolecular network frame structure manganese-based nanocomposite electrocatalyst, wherein the nanomaterial active substance is ZIF-8@TA-Mn. Solve the problems of existing fuel cell catalysts and overcome the defects of the existing technology. At present, fuel cell catalysts generally face the problems of single precursor and synthesis cost, as well as the high cost and toxicity of Pt-based catalytic materials. Based on ZIF‑ 8 Unique structure, developed a metal-organic framework nanocomposite for proton membrane fuel cells with high onset potential, half-slope potential, excellent limiting current and excellent stability and good methanol tolerance , has the advantages of strong anti-methanol poisoning ability.

Description

technical field [0001] The invention is used for nano-scale manganese-based oxide proton membrane fuel cell catalyst, and relates to the preparation of ZIF-8@TA-Mn nanomaterial by a thermal decomposition process and its application as an oxygen reduction catalyst material. Background technique [0002] Proton Membrane Fuel Cell (PEMFC) has the characteristics of high specific energy, quick start at low temperature, convenient operation, high smooth operation and green environmental protection. New energy vehicles and other aspects have attracted the attention of a wide range of scholars. At present, PEMFC still faces problems such as high cost and short life, which makes it impossible to achieve wide application, which limits the further development of PEMFC in the process of industrialization. In order to improve the performance of PEMFC and reduce the cost of catalysts, there are mainly two ways: one is from the perspective of the intrinsic activity of the catalyst, by ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90B82Y30/00B82Y40/00
CPCH01M4/90H01M4/9016H01M4/9075B82Y30/00B82Y40/00Y02E60/50
Inventor 肖高张梦瑶
Owner FUZHOU UNIV
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