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Preparation method, product and application of nickel-based metal organic framework compound

An organic framework and metal-based technology, applied in the field of electrocatalysis, can solve the problems of single structural components, complex operation process, unfavorable large-scale preparation and research of catalytic active sites, etc., to achieve excellent catalytic activity, good conductivity, and cycle The effect of excellent stability

Active Publication Date: 2021-07-13
HENAN INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the complex operation process and single structural components of this strategy are not conducive to the actual large-scale preparation and the study of its real catalytic active sites.

Method used

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  • Preparation method, product and application of nickel-based metal organic framework compound
  • Preparation method, product and application of nickel-based metal organic framework compound
  • Preparation method, product and application of nickel-based metal organic framework compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Get 0.2934g of nickel nitrate hexahydrate, 0.1722g of 2,5-thiophenedicarboxylic acid, 0.1570g of 4,4'-bipyridine, and then measure H 2 O 10ml, N,N-dimethylformamide 10ml, and pour it into a beaker, stir it with a glass rod, put it into an ultrasonic wave, and ultrasonically disperse it for 30 minutes; Hours, down to room temperature, suction filtration to obtain 0.2931g emerald green powder, which is a nickel-based metal organic framework compound.

[0042] Using the emerald green powder as a precursor, take 600mg and put it into a magnetic boat, under the protection of nitrogen, pyrolyze it at 700°C for three hours, and the heating rate is 5°C·min -1 , to obtain 280mg of black powder, which is the catalyst.

[0043] The FESEM figure of the catalyst prepared in this embodiment is shown in figure 1 ,Such as figure 1 As shown in a, the catalyst is flower-shaped composed of many long flakes with a length of 20 μm and a width of 1 μm. Depend on figure 1 b It can be see...

Embodiment 2

[0060] Same as Example 1, the only difference is that the process of preparing the black powder is pyrolysis at 600° C. for three hours. The performance of the catalyst prepared in this embodiment is shown in Image 6 ,from Image 6 It can be seen that the initial potential of the catalyst is 1.37V vs. RHE, and the maximum current density is 32.20mA cm -2 , outperforming commercial iridium carbon.

Embodiment 3

[0062] Same as Example 1, the only difference is that the process of preparing the black powder is pyrolysis at 800° C. for three hours. The performance of the catalyst prepared in this embodiment is shown in Figure 7 ,from Figure 7 It can be seen that the initial potential of the catalyst is 1.37V vs. RHE, and the maximum current density is 30.90mA cm -2 , outperforming commercial iridium carbon.

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Abstract

The invention discloses a preparation method, a product and application of a nickel-based metal organic framework compound, and belongs to the technical field of electrocatalysis. The preparation method comprises the following steps: mixing nickel salt, 2, 5-thiophenedicarboxylic acid, 4, 4'-bipyridine, water and N, N-dimethylformamide into a reaction container, uniformly stirring, carrying out ultrasonic treatment, then putting into a high-pressure reaction kettle, reacting, cooling to room temperature, and carrying out suction filtration to obtain emerald green powder, namely the nickel-based metal organic framework compound. The prepared material has great advantages in the aspects of catalytic oxygen evolution and energy conversion, and in the catalytic oxygen evolution reaction, the prepared composite material has very small overpotential under high current density, and has very excellent catalytic activity and cycling stability under high current density. The catalyst has better conductivity than commercial iridium carbon, and has better electron utilization rate in the electrochemical catalysis process.

Description

technical field [0001] The invention relates to the technical field of electrocatalysis, in particular to a preparation method, product and application of a nickel-based metal organic framework compound. Background technique [0002] With the continuous growth of global energy demand, fossil fuels have been increasingly depleted, and the consumption of a large amount of fossil fuels has brought serious environmental pollution problems. Therefore, it is of great significance to develop and utilize various clean and sustainable energy conversion and storage technologies with high efficiency, low cost, and environmental friendliness. Solar energy is considered to be one of the most abundant natural resources, and people are researching and utilizing it through various strategies and methods. The most typical method is to use solar cells (ie, solid-state photovoltaic devices and dye-sensitized solar cells) to convert solar energy into It is electrical energy, but this method ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C25B1/04C25B11/091
CPCC08G83/008C25B1/04Y02E60/36
Inventor 韩会娟姚路陈兰兰杨星星
Owner HENAN INST OF SCI & TECH
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