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Preparation method of nickel-based heterogeneous composite material and its application in catalytic methanol oxidation

A nickel-based, chemical technology, applied in the direction of organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as expensive prices, scarce storage capacity, and obstacles to wide application

Active Publication Date: 2022-03-08
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrocatalysis is a simple and efficient way to produce hydrogen, and Pt metal is an efficient catalyst for hydrogen production, but its expensive price and scarce storage capacity also hinder its wide application

Method used

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  • Preparation method of nickel-based heterogeneous composite material and its application in catalytic methanol oxidation
  • Preparation method of nickel-based heterogeneous composite material and its application in catalytic methanol oxidation
  • Preparation method of nickel-based heterogeneous composite material and its application in catalytic methanol oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 0.025mmol 2,5-dihydroxyterephthalic acid, 0.025mmol 1,4-bis(imidazolium)butane, 0.01mmol nickel sulfate, 2ml of N,N-dimethylformamide (DMF), 1ml of Deionized water, 0.1M KOH to adjust the pH value, sonicate for 30min and put it into a 10ml glass vial, react at a constant temperature of 100°C for 60h, and cool down to room temperature at a constant rate of 2-3°C / h to obtain green flaky crystals, namely Ni- MOF materials. Depend on image 3 It can be seen that the powder diffraction peaks of the prepared samples are highly consistent with the diffraction peaks of Ni-MOF simulated by single crystal data, and the obtained samples are Ni-MOF materials with high purity.

Embodiment 2

[0024] Weigh 0.025mmol 2,5-dihydroxyterephthalic acid, 0.025mmol 1,4-bis(imidazolium)butane, 0.01mmol nickel sulfate, 2ml of N,N-dimethylformamide (DMF), 1ml of Deionized water, sonicated for 30min, was added into a 10ml glass vial, and reacted at a constant temperature of 100°C for 60h, and then cooled down to room temperature at a constant rate of 2-3°C / h to obtain a clear solution.

[0025] For further optimization, carry out Examples 1-10 by changing different conditions, as shown in the following table.

[0026]

Embodiment 11

[0028] Weigh 2 mg of the porous crystalline metal organic framework material sample collected in Example 1 into a 4 ml sample tube, add 1.2 ml of absolute ethanol, 0.6 ml of deionized water and 0.2 ml of naphthol, and apply it on the glass after 30 min of ultrasound. On the carbon electrode, test the methanol oxidation performance of the material. After scanning the CV curve in 0.1M KOH until it is stable, then test it in 0.1M KOH+1.0M CH 3 Test methanol oxidation curve in OH, test as Figure 4 .

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Abstract

The invention discloses a nickel-based heterogeneous composite material, a preparation method and its application, specifically a new case of Ni-MOF synthesized by a hydrothermal method, and at the same time introducing Fe 3 o 4 / NiOOH to construct a heterogeneous composite material and use it as a cathode catalyst material for methanol oxidation to explore its application in methanol oxidation. The present invention utilizes organic ligands 2,5-dihydroxyterephthalic acid, 1,4-bis(imidazolium)butane and nickel sulfate in N,N-dimethylformamide, deionized water and KOH mixed solution The self-assembled porous metal organic framework material is assembled into a three-electrode system to test methanol oxidation. The advantages of the present invention are: the metal organic framework material has a simple synthesis process and high crystallization purity; and it has a novel structure and a large porosity ; 3 o 4 The incorporation of / NiOOH has the advantages of low temperature, safety, and no harmful solvents. Through data analysis, this material has excellent methanol oxidation activity.

Description

technical field [0001] The invention relates to a metal-organic framework material formed with 2,5-dihydroxyterephthalic acid as the main component, 1,4-bis(imidazolium)butane as the auxiliary component, and transition metal nickel as the metal center while introducing Fe 3 o 4 / NiOOH to construct a heterogeneous composite material and its preparation method. It has excellent performance for methanol oxidation (MOR) through the preparation of catalyst electrode materials. Background technique [0002] With the continuous development of society, the increase in the consumption of fossil fuels has gradually led to the deterioration of the earth's environment and the depletion of renewable resources. Due to environmental pressure, people's demand for new energy systems is becoming more and more urgent. Green, clean and efficient renewable energy has become a focus of attention. Electrocatalysis is a simple and efficient way to produce hydrogen, and Pt metal is an efficient ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C25B11/095C25B3/23C25B3/07
CPCB01J31/28B01J31/1691B01J31/1815C25B11/04B01J2531/847B01J35/33
Inventor 吴亚盘余鸿光李东升皮球李永双李双张健张其春
Owner CHINA THREE GORGES UNIV