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Double-defect ultrathin metal organic framework nanosheet catalyst, preparation method and application thereof

An ultra-thin metal and organic framework technology, applied in the direction of electrodes, electrolytic processes, electrolytic components, etc., can solve the problems of insufficient stability and poor electrocatalytic performance, and achieve rapid electrocatalytic decomposition of water and oxygen evolution reaction, good catalytic Stability, low cost effect

Active Publication Date: 2021-06-01
QUZHOU RES INST OF ZHEJIANG UNIV +1
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  • Summary
  • 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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  • Double-defect ultrathin metal organic framework nanosheet catalyst, preparation method and application thereof
  • Double-defect ultrathin metal organic framework nanosheet catalyst, preparation method and application thereof
  • Double-defect ultrathin metal organic framework nanosheet catalyst, preparation method and application thereof

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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-mentioned mixed solution was transferred to a cell disruptor, and the strength of 700W was used for ultrasonic peeling for 600min. Then the mixed solution was placed under simulated sunlight AM 1.5G and irradiated for 3h with a light intensity of 80mW 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-mentioned mixed solution was transferred to a cell disruptor, and the strength of 700W was used for ultrasonic peeling for 600min. Then the mixed solution was placed under simulated sunlight AM 1.5G and irradiated for 3h with a light intensity of 80mW 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-mentioned mixed solution was transferred to a cell disruptor, and the strength of 700W was used for ultrasonic peeling for 600min. Then the mixed solution was placed under simulated sunlight AM 1.5G and irradiated for 3h with a light intensity of 80mW 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 ultrathin metal organic framework nanosheet catalyst, a preparation method and application thereof. The preparation method comprises the steps of: dissolving 2, 6-naphthalic acid and naphthoic acid in a solvent, adding a nickel salt and an acid-binding agent into the solvent, subjecting the obtained solution to ultrasonic stripping and light treatment, and then conducting washing and separation to obtain the catalyst; the catalyst has an ultrathin nanosheet structure and a larger specific surface area, so that more catalytic active sites are exposed, the reaction energy potential barrier can be reduced, and the catalytic performance is improved. When the catalyst is applied to electrocatalytic water oxygen evolution reaction, electrochemical decomposition of water for oxygen evolution can be quickly realized under the condition of low energy consumption, and meanwhile, the catalyst has relatively 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 Applications(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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