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Cubic MOF-5 catalyst and preparation method and application thereof in production of hydrogen peroxide through oxygen reduction

A technology of MOF-5 and catalyst, applied in electrolysis components, electrodes, electrolysis process, etc., can solve problems such as reaction failure, and achieve the effects of convenient operation, simple preparation process and good stability

Active Publication Date: 2021-10-22
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the microwave reaction also has its limitations. The reaction solvent must be a polar solvent, and the reaction process may also fail if the reaction is too fast.

Method used

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  • Cubic MOF-5 catalyst and preparation method and application thereof in production of hydrogen peroxide through oxygen reduction
  • Cubic MOF-5 catalyst and preparation method and application thereof in production of hydrogen peroxide through oxygen reduction
  • Cubic MOF-5 catalyst and preparation method and application thereof in production of hydrogen peroxide through oxygen reduction

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A preparation method of cubic MOF-5 catalyst, comprising the following steps:

[0039] 1) Zn(OAc) 2 2H 2 O was dissolved in NMP to prepare Zn(OAc) 2 2H 2 O concentration is the zinc salt solution of 160mM; Dissolving terephthalic acid in NMP, preparation concentration is the terephthalic acid solution of 80mM;

[0040] 2) Add PVP to the terephthalic acid solution prepared in step 1), and ultrasonically dissolve to obtain solution A, the concentration of PVP in solution A is 200mM. The solution A is mixed with the zinc salt solution prepared in step 1) according to a volume ratio of 2:1, so that the reaction raw material Zn(OAc) 2 2H 2 The molar feed ratio of O and terephthalic acid is 1:1;

[0041] 3) The mixed solution obtained in step 2) was transferred to a high-temperature-resistant glass reaction tube, sealed and transferred to a microwave heating device, and the microwave heating reaction was started. The microwave power was 50W, the reaction temperature was...

Embodiment 2

[0044] A preparation method of a cubic MOF-5 catalyst, the preparation method repeats Example 1, the difference is only in "step 2), solution A and zinc salt solution are mixed in equal volume, so that the reaction raw material Zn(OAc) 2 2H 2 The molar feed ratio of O and terephthalic acid is 2:1", and the remaining steps are repeated in Example 1, and the final catalyst is marked as MOF-5-2.

Embodiment 3

[0046] A preparation method of a cubic MOF-5 catalyst, the preparation method repeats Example 1, the difference is only in "step 2), solution A and zinc salt solution are mixed according to the volume ratio of 1:1.5, so that the reaction Raw material Zn(OAc) 2 2H 2 The molar ratio of O to terephthalic acid is 3:1", and the remaining steps are repeated in Example 1, and the final catalyst is marked as MOF-5-3.

[0047] The catalysts MOF-5-1, MOF-5-2, and MOF-5-3 prepared in the above examples 1-3 were respectively subjected to SEM characterization, and the SEM characterization results were as follows: figure 1 , figure 2 with image 3 shown. from Figure 1-3 By comparison, it can be seen that the reaction raw material Zn(OAc) 2 2H 2 When the molar ratio of O to terephthalic acid is 1:1 (corresponding figure 1 ), the reaction generates irregular crystals such as spheres or columns; the reaction raw material Zn(OAc) 2 2H 2 When the molar ratio of O to terephthalic acid...

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Abstract

The invention discloses a cubic MOF-5 catalyst and a preparation method and application thereof in production of hydrogen peroxide through oxygen reduction. The preparation method of the catalyst comprises the following steps: by taking Zn (OAc)2.2H2O and terephthalic acid as reaction raw materials, PVP as an additive and NMP as a solvent, adding the reaction raw materials and the additive into the solvent, and uniformly mixing to form a reaction liquid system; placing the reaction liquid system in a microwave radiation environment for reaction; and after the reaction is finished, performing filtering, soaking a solid product in chloroform to remove guest molecules, then performing filtering, drying, and finally roasting in an argon atmosphere to obtain the cubic MOF-5 catalyst. The catalyst disclosed by the invention is simple in preparation process flow, free of noble metal loading and low in cost, has good hydrogen peroxide production electro-catalysis performance and stability when being applied to preparation of hydrogen peroxide through electro-catalysis oxygen reduction, and has huge application potential.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a cubic MOF-5 catalyst, a preparation method thereof, and an application thereof in producing hydrogen peroxide through oxygen reduction. Background technique [0002] Hydrogen peroxide is a weakly acidic, colorless, odorless, transparent liquid that is miscible with water in any proportion and soluble in alcohol and ether, but insoluble in petroleum ether. Hydrogen peroxide is known as the "cleanest" chemical. Its by-product after the reaction is only water, and because of its good redox performance, it has played a huge role in the synthesis of many important chemical intermediates. Secondly, because of its Good sterilization and disinfection, widely used in medical disinfection, environmental sterilization and other occasions. With the continuous growth of hydrogen peroxide production, its application range is also expanding. Hydrogen peroxide is mai...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B1/30
CPCC25B11/091C25B1/30
Inventor 王建国王国梁张世杰包志康季文凯丁磊彭小革
Owner ZHEJIANG UNIV OF TECH
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