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A kind of two-dimensional bimetallic site conductive metal organic framework material and preparation method thereof

A conductive metal, organic framework technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, electrodes, etc., can solve problems such as difficulty in generating electrocatalytic activity, and achieve good electrochemical stability. , The method is simple and green, and the preparation conditions are mild.

Active Publication Date: 2022-08-09
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In theoretical and experimental studies, the metal atoms in the M-N4 bond still maintain their original oxidation state during the electrocatalytic process, making it difficult to generate effective electrocatalytic activity.

Method used

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  • A kind of two-dimensional bimetallic site conductive metal organic framework material and preparation method thereof
  • A kind of two-dimensional bimetallic site conductive metal organic framework material and preparation method thereof
  • A kind of two-dimensional bimetallic site conductive metal organic framework material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] 1. Preparation of nickel-hexaaminohexaazine

[0032] Dissolve 162 mg (0.684 mmol) of nickel chloride in 30 mL of ethanol, adjust pH to 4 with hydrochloric acid, then add 100 mg (0.210 mmol) of hexaaminohexaazabenzene, and reflux in a water bath at 70°C for 4 hours, after the reaction is complete The temperature is lowered, the obtained solution is rotary evaporated to dryness, the obtained solid is dissolved in ethanol and recrystallized, and the obtained black solid is dried on a watch glass to obtain nickel-hexaaminohexaazine powder.

[0033] 2. Two-dimensional bimetallic site conductive metal-organic framework materials

[0034] Dissolve 51 mg (0.216 mmol) of nickel chloride in 40 mL of deionized water, add 2 mL of ammonia water, stir evenly at 65°C in an air environment, add 100 mg (0.147 mmol) of nickel-hexaaminohexaazine powder to it, and continue Stir and reflux at this temperature for 2 hours. After the obtained solution is concentrated under reduced pressure,...

Embodiment 2

[0036] In step 1 of the present embodiment, the nickel chloride in step 1 of embodiment 1 is replaced with equimolar cobalt chloride to obtain cobalt hexaaminohexaazabenzene powder, and then step 2 is used to prepare a structural formula of Ni 3 (Co 3 ·HAHATN) 2 2D bimetallic site-conducting metal-organic frameworks (see Figure 5 ), which belongs to the hexagonal crystal system, P6 / mmm space group, and the unit cell parameters are: α=90°, β=90°, γ=120°.

Embodiment 3

[0038] In step 1 of this embodiment, the nickel chloride in step 1 of embodiment 1 is replaced with equimolar copper chloride to obtain copper-hexaaminohexaazabenzene powder, and then step 2 is used to prepare the formula Ni 3 (Cu 3 ·HAHATN) 2 2D bimetallic site-conducting metal-organic frameworks (see Image 6 ), which belongs to the hexagonal crystal system, P6 / mmm space group, and the unit cell parameters are: α=90°, β=90°, γ=120°.

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Abstract

The invention discloses a two-dimensional bimetallic site conductive metal-organic framework material and a preparation method thereof. The structural unit of the material is M2 3 (M1 3 ·HAHATN) 2 , where M1 and M2 represent any one of Ni, Cu, and Co, and HAHATN represents a hexaaminohexaazabenzene hexavalent anion that loses six hydrogen atoms. The present invention constructs a two-dimensional conductive MOF with additional metal sites through a two-step selective complexation reaction of conjugated organic ligand molecules at two sites. The method of the invention is simple and green, the preparation conditions are mild, the prepared conductive MOF material has an ultra-thin and stable rigid two-dimensional structure and an enlarged in-plane mesoporous structure, and the highly unsaturated variable-valence transition metal sites are exposed in the pores. It has potential application value in new energy applications such as electrocatalysis, photocatalysis, supercapacitors, and lithium-ion batteries. The method of the present invention can also be used to prepare multi-transition metal complexed two-dimensional conductive MOF materials by regulating the chemical composition of ligand molecules.

Description

technical field [0001] The invention belongs to the technical field of metal organic framework materials, in particular to a bimetallic site conductive metal organic framework material and a preparation method of the material. Background technique [0002] Metal-organic framework (MOF) materials are porous materials composed of metal nodes and multi-component organic linkers. This unique structure not only brings a large surface area, but also exposes each metal atom as an active site in the pores of the framework, which has potential applications in gas separation, catalysis, and detection. In addition, the frame structure of MOF has great controllability, and MOF materials with specific structures can be directionally designed or modified according to different needs. These properties make MOF materials the preferred heterogeneous catalysts for various reaction types. However, due to the limitation of chemical structure, MOF materials can only exhibit low charge transfer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C25B1/04C25B11/085
CPCB01J31/1691B01J31/1815B01J35/0033C25B1/04B01J2531/847B01J2531/845B01J2531/16C25B11/075Y02E60/50
Inventor 黄昊张颖邹永瑾杨楠赵心毓
Owner SHAANXI NORMAL UNIV
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