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Modulated nickel/cobalt bimetal MOF (Metal Organic Framework)-based electrocatalyst as well as preparation method and application thereof

An electrocatalyst and bimetallic technology, applied in the field of electrocatalysis, can solve the problems of poor conductivity and low catalytic activity of MOF, and achieve the effect of improving conductivity, high current density and low initial potential

Pending Publication Date: 2022-04-12
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of modulated nickel / cobalt bimetallic MOF-based catalyst, improve the problem of poor electrical conductivity and low catalytic activity of MOF itself, and the preparation method of the catalyst is simple, and the product can be directly used in UOR high-efficiency electrocatalysis

Method used

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  • Modulated nickel/cobalt bimetal MOF (Metal Organic Framework)-based electrocatalyst as well as preparation method and application thereof
  • Modulated nickel/cobalt bimetal MOF (Metal Organic Framework)-based electrocatalyst as well as preparation method and application thereof
  • Modulated nickel/cobalt bimetal MOF (Metal Organic Framework)-based electrocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This example has prepared a kind of modulation nickel / cobalt bimetallic MOF-based catalyst, and specific preparation method comprises the following steps:

[0050] A piece of nickel foam (1 cm × 3 cm) was ultrasonically cleaned sequentially with 3M hydrochloric acid, deionized water, and absolute ethanol, and then dried in a vacuum.

[0051] Terephthalic acid (0.075M) and ferrocenecarboxylic acid (0.01M) were dissolved in 5 mL of DMF. Then, 1 mL of 0.2M NaOH solution was added. After that, the above solution was slowly mixed with 5 mL of DMF solution in which nickel nitrate hexahydrate (0.019M) and cobalt nitrate hexahydrate (0.056M) were dissolved in a 30 mL autoclave filled with nickel foam (1 cm × 3 cm). Finally, the autoclave was heated at 100°C for 14 hours. The nickel foam was removed, washed twice each with DMF and ethanol, and dried under vacuum. The loading of NiCoMOF-Fc material on nickel foam is about 1.4 mg cm -2 .

[0052] The electron microscope image...

Embodiment 2

[0054] This example has prepared a kind of modulation nickel / cobalt bimetallic MOF-based catalyst with the different ratio of embodiment 1, and concrete preparation method comprises the following steps:

[0055] Terephthalic acid (0.075M) and ferrocenecarboxylic acid (0.01M) were dissolved in 5 mL of DMF. Then, 1 mL of 0.2M NaOH solution was added. After that, the above solution was slowly mixed with 5 mL of DMF solution in which nickel nitrate hexahydrate (0.013M) and cobalt nitrate hexahydrate (0.063M) were dissolved in a 30 mL autoclave filled with nickel foam (1 cm × 3 cm). Finally, the autoclave was heated at 100°C for 14 hours. The nickel foam was removed, washed twice each with DMF and ethanol, and dried under vacuum. The loading of NiCoMOF-Fc material on nickel foam is about 1.4 mg cm -2 .

Embodiment 3

[0057] This example has prepared a kind of modulation nickel / cobalt bimetallic MOF-based catalyst with the different ratio of embodiment 1, and concrete preparation method comprises the following steps:

[0058] Terephthalic acid (0.075M) and ferrocenecarboxylic acid (0.01M) were dissolved in 5 mL of DMF. Then, 1 mL of 0.2M NaOH solution was added. After that, the above solution was slowly mixed with 5 mL of DMF solution in which nickel nitrate hexahydrate (0.063M) and cobalt nitrate hexahydrate (0.013M) were dissolved in a 30 mL autoclave filled with nickel foam (1 cm × 3 cm). Finally, the autoclave was heated at 100°C for 14 hours. The nickel foam was removed, washed twice each with DMF and ethanol, and dried under vacuum. The loading of NiCoMOF-Fc material on nickel foam is about 1.4 mg cm -2 .

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Abstract

The invention relates to a modulated nickel / cobalt bimetal organic framework (MOF)-based electrocatalyst, a preparation method and application. The catalyst comprises a conductive substrate and a ferrocenecarboxylic acid-modulated nickel / cobalt bimetallic MOF (NiCoMOF-Fc) material loaded on the surface of the conductive substrate, wherein the NiCoMOF-Fc material has catalytic activity. The catalyst is prepared by a simple one-step solvothermal method and comprises the following specific steps: mixing an N, N-dimethylformamide (DMF) solution in which terephthalic acid and ferrocenecarboxylic acid are dissolved and a DMF solution in which nickel salt and cobalt salt are dissolved in a reaction kettle in which a conductive substrate is placed, carrying out solvothermal reaction, taking out the conductive substrate after the reaction is finished, washing and drying to obtain the catalyst. The catalyst is obtained. The modulated nickel / cobalt bimetal MOF-based electrocatalyst provided by the invention has excellent urea oxidation reaction (UOR) electrocatalytic activity, the preparation process is simple, large-scale production is easy, and the modulated nickel / cobalt bimetal MOF-based electrocatalyst has important practical application value in urea-assisted water decomposition, urea-containing wastewater treatment and direct urea fuel cells.

Description

technical field [0001] The application relates to the technical field of electrocatalysis, in particular to a modulation nickel / cobalt bimetallic MOF-based electrocatalyst and its preparation method and application. Background technique [0002] With the intensification of the traditional energy crisis and the increasingly prominent environmental problems, renewable energy and clean energy have attracted more and more attention. Among new energy sources, hydrogen energy is considered to be one of the most potential clean energy sources in the 21st century because it is carbon neutral and has high energy density. Electrocatalytic water splitting is an effective way to produce hydrogen, and the cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER) are its conventional half-reactions. According to the reaction thermodynamics, the required voltage for water splitting is as high as 1.23 V with the above half-reaction. In fact, the voltage of a wo...

Claims

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Application Information

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IPC IPC(8): C25B1/02C25B1/50C25B11/054C25B11/061C25B11/095
Inventor 王新星徐立强孙浩迪谢晓培张玉冰
Owner QINGDAO UNIV OF SCI & TECH
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