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Cobalt (II) metal organic framework material and application thereof in electrocatalytic hydrogen evolution

A metal-organic framework, cobalt chloride hexahydrate technology, applied in the synthesis and application of new catalyst materials, can solve the problems of large Tafel slope and high overpotential, achieve simple preparation method, reduce catalyst cost, easy separation and wash clean effect

Pending Publication Date: 2020-07-10
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, traditional electrocatalytic hydrogen evolution materials have disadvantages such as high overpotential and excessive Tafel slope, so it is necessary to explore new catalyst materials in order to improve hydrogen production efficiency

Method used

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  • Cobalt (II) metal organic framework material and application thereof in electrocatalytic hydrogen evolution
  • Cobalt (II) metal organic framework material and application thereof in electrocatalytic hydrogen evolution
  • Cobalt (II) metal organic framework material and application thereof in electrocatalytic hydrogen evolution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 9.6 mg of 1,3,5-trimethyl-2,4,6-tris(4-carboxyphenyl)benzene, 4.7 mg of cobalt chloride hexahydrate, and N,N-dimethylformamide (3 mL) , deionized water (1 mL) were mixed together in a beaker, and then 50 μL of HBF was added dropwise to the mixed solution 4 aqueous solution ( V HBF4 : V H2O = 1:3), the mixed solution was continued to be ultrasonically sonicated for 30 minutes, and finally the mixed solution was transferred to a stainless steel reactor with a polytetrafluoroethylene liner. The reaction kettle was placed in an oven at 80 °C for 24 hours at a constant temperature, and then the oven was lowered to room temperature for 10 hours to obtain a blue transparent block crystal, that is, the Co-MOF material. Depend on Figure 1-2 It can be seen that metal cobalt ions adopt two coordination configurations of four coordination and six coordination in this material, and the whole structure belongs to a two-dimensional planar structure. Depend on image 3 It ...

Embodiment 2

[0032] Take 9.6 mg of 1,3,5-trimethyl-2,4,6-tris(4-carboxyphenyl)benzene, 4.7 mg of cobalt chloride hexahydrate, and N,N-dimethylformamide (3 mL) , deionized water (1 mL) were mixed together in a beaker, and then 50 μL of HBF was added dropwise to the mixed solution 4 aqueous solution ( V HBF4 : V H2O= 1:3), the mixed solution was continued to be ultrasonically sonicated for 30 minutes, and finally the mixed solution was transferred to a stainless steel reactor with a polytetrafluoroethylene liner. The reaction kettle was placed in an oven at 100 °C for 24 hours at a constant temperature, and then the oven was lowered to room temperature for 10 hours to obtain a blue transparent bulk crystal, that is, the Co-MOF material. The powder diffraction peaks of the samples prepared in this example coincide with the XRD diffraction peaks of Example 1, and the obtained samples are Co-MOF materials with relatively high purity.

Embodiment 3

[0034] Take 9.6 mg of 1,3,5-trimethyl-2,4,6-tris(4-carboxyphenyl)benzene, 4.7 mg of cobalt chloride hexahydrate, and N,N-dimethylformamide (3 mL) , deionized water (1mL) were mixed together in a beaker, and then 50 μL of HBF was added dropwise to the mixed solution 4 aqueous solution ( V HBF4 : V H2O = 1:3), the mixed solution was continued to be ultrasonically sonicated for 30 minutes, and finally the mixed solution was transferred to a stainless steel reactor with a polytetrafluoroethylene liner. The reaction kettle was placed in an oven at 120 °C for 24 hours at a constant temperature, and then the oven was lowered to room temperature for 10 hours to obtain a blue transparent block crystal, that is, the Co-MOF material. The powder diffraction peaks of the samples prepared in this example coincide with the XRD diffraction peaks of Example 1, and the obtained samples are Co-MOF materials with relatively high purity.

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Abstract

The invention relates to a cobalt (II) metal organic framework material with electro-catalytic hydrogen evolution performance and a performance test method of the cobalt (II) metal organic framework material serving as an electro-catalytic hydrogen evolution catalyst. The cobalt chloride hexahydrate and 1,3,5-trimethyl-2, 4, 6-tricarboxyl phenyl benzene (H3TMTA) are mainly used as main synthesis raw materials, a blue blocky crystalline product is obtained through a solvothermal method, and the molecular formula of the product can be expressed as [Co2(TMTA)(DMF)(H2O)3].Cl. The blue crystallinematerial is subjected to washing, drying and grinding, and uniform ultrasonic treatment is carried out on the blue crystalline material and Nafion to obtain the electro-catalytic hydrogen evolution material. The preparation method of the material is relatively simple; material yield is high, the obtained catalyst has relatively good water electrolysis hydrogen evolution capability; according to the present invention, the hydrogen evolution potential is 283 mV under the condition of the current density of 10 mA / cm<2>, such that the good electro-catalysis performance is provided, and the certainreference value is provided for the development of the field of the novel electro-catalysis hydrogen evolution catalyst.

Description

technical field [0001] The invention belongs to the technical field of synthesis and application of new catalyst materials, in particular to a preparation method of a metal organic framework material and its application in electrocatalytic water splitting and hydrogen evolution. Background technique [0002] With the continuous development of society, the use of fossil fuels since the industrial revolution has greatly increased the productivity of human society, but it has caused a series of serious problems such as global warming, which has gradually attracted the attention of countries all over the world. The shortage of resources and energy in the world Problems have arisen in most countries and even globally. Hydrogen energy has become an important secondary energy source on the world energy stage. It is an extremely superior new energy source. Its main advantages are high combustion calorific value and only water is the product of combustion. It is known as the cleanes...

Claims

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Application Information

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IPC IPC(8): B01J31/16C25B1/04C25B11/06
CPCB01J31/1691C25B1/04C25B11/051C25B11/075B01J35/33Y02E60/36
Inventor 赵君贾敬李东升董文文吴亚盘张其春张健
Owner CHINA THREE GORGES UNIV
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