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A double-defect ultrathin metal-organic framework nanosheet catalyst and its preparation method and application

An ultra-thin metal, organic framework technology, applied in the direction of electrolysis components, electrodes, electrolysis process, etc., can solve the problems of poor electrocatalytic performance and insufficient stability, and achieve rapid electrocatalytic decomposition of water and oxygen evolution reaction, good catalysis The effect of stability and low energy consumption

Active Publication Date: 2022-04-08
QUZHOU RES INST OF ZHEJIANG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preparing an ultra-thin metal-organic framework nanosheet catalyst with double defects, aiming at the defects that the electrocatalysts prepared based on MOF still have poor electrocatalytic performance and insufficient stability in the prior art. The catalyst prepared by this method exhibits excellent catalytic activity and stability for the electrocatalytic water splitting oxygen evolution reaction, even better than the currently recognized noble metal Ir-based catalysts with good OER performance.

Method used

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  • A double-defect ultrathin metal-organic framework nanosheet catalyst and its preparation method and application
  • A double-defect ultrathin metal-organic framework nanosheet catalyst and its preparation method and application
  • A double-defect ultrathin metal-organic framework nanosheet catalyst and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0043] 129.7mg of 2,6-naphthalene dicarboxylic acid and 34.4mg of naphthoic acid were added to a mixed solution of N,N-dimethylformamide, absolute ethanol and deionized water (32mL:2mL:2mL), and then added to the above solution 190.2 mg of nickel chloride hexahydrate was added to the solution, and 1.5 mL of triethylamine was added rapidly at the same time, and magnetically stirred for 10 min. Then the above mixed solution was transferred to a cell disruptor, and ultrasonically peeled at 700W for 600 min. Then the mixed solution was irradiated for 3 h under simulated sunlight AM 1.5G with a light intensity of 80 mW cm -2 After the light is finished, it is washed several times with absolute ethanol, and the solid sample is separated by a 10000r / s high-speed centrifuge. Finally, the samples were vacuum-dried at room temperature for 12 h.

Embodiment 2

[0045] 151.3mg of 2,6-naphthalene dicarboxylic acid and 17.2mg of naphthoic acid were added to a mixed solution of N,N-dimethylformamide, absolute ethanol and deionized water (32mL:2mL:2mL), and then added to the above solution 190.2 mg of nickel chloride hexahydrate was added to the solution, and 1.5 mL of triethylamine was added rapidly at the same time, and magnetically stirred for 10 min. Then the above mixed solution was transferred to a cell disruptor, and ultrasonically peeled at 700W for 600 min. Then the mixed solution was irradiated for 3 h under simulated sunlight AM 1.5G with a light intensity of 80 mW cm -2 After the light is finished, it is washed several times with absolute ethanol, and the solid sample is separated by a 10000r / s high-speed centrifuge. Finally, the samples were vacuum-dried at room temperature for 12 h.

Embodiment 3

[0047] 108.1 mg of 2,6-naphthalene dicarboxylic acid and 51.6 mg of naphthoic acid were added to a mixed solution of N,N-dimethylformamide, absolute ethanol and deionized water (32mL:2mL:2mL), and then added to the above solution 190.2 mg of nickel chloride hexahydrate was added to the solution, and 1.5 mL of triethylamine was added rapidly at the same time, and magnetically stirred for 10 min. Then the above mixed solution was transferred to a cell disruptor, and ultrasonically peeled at 700W for 600 min. Then the mixed solution was irradiated for 3 h under simulated sunlight AM 1.5G with a light intensity of 80 mW cm -2 After the light is finished, it is washed several times with absolute ethanol, and the solid sample is separated by a 10000r / s high-speed centrifuge. Finally, the samples were vacuum-dried at room temperature for 12 h.

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Abstract

The invention relates to the technical field of energy material synthesis, and discloses a double-defect ultra-thin metal-organic framework nanosheet catalyst and its preparation method and application. The preparation method includes the steps of: dissolving 2,6-naphthalene dicarboxylic acid and naphthoic acid in a solvent , and then add nickel salt and acid-binding agent to the solvent, and the obtained solution is subjected to ultrasonic stripping, light treatment, and then washed and separated to obtain a catalyst; the catalyst has an ultra-thin nanosheet structure and a larger specific surface area, thus exposing more More catalytic active sites can reduce the reaction energy barrier and improve the catalytic performance. Applied in the electrocatalytic water oxygen evolution reaction, the electrochemical decomposition of water oxygen evolution can be quickly realized under the condition of low energy consumption, and at the same time, it has good catalytic stability.

Description

technical field [0001] The invention relates to the technical field of energy material synthesis, in particular to a double-defect ultra-thin metal-organic framework nanosheet catalyst and its preparation method and application. Background technique [0002] Electrochemical catalytic water splitting is an excellent strategy to realize chemical energy conversion and energy conversion, which can effectively alleviate the increasingly severe energy crisis without burdening the environment and ecology. However, the oxygen evolution reaction (OER) at the anode is a kinetically sluggish process associated with multi-step proton-coupled electron transfer, which largely limits the water-splitting efficiency and activity of catalysts. [0003] In order to effectively solve this problem, many researchers have developed various catalysts to reduce the high energy barrier of oxygen production at the anode. Among them, noble metal catalysts are recognized as a type of catalyst with the b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/085
CPCC25B1/04Y02E60/36
Inventor 侯阳何凡杨彬雷乐成
Owner QUZHOU RES INST OF ZHEJIANG UNIV
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