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Oxygen evolution reaction (OER) catalyst based on composite structure of MXene and metal-organic frameworks (MOFs) and synthesis method of catalyst

A technology of metal-organic framework and oxygen evolution reaction, applied in the field of energy and catalysis, and nanomaterials, can solve the problems of poor conductivity and poor structural stability of MOFs, and achieve the effects of easy control, large-scale production, and low energy consumption

Active Publication Date: 2019-07-23
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of MOFs such as poor conductivity and poor structural stability, the present invention provides a catalyst for oxygen evolution reaction based on the composite structure of MXene and MOFs and its synthesis method. composition

Method used

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  • Oxygen evolution reaction (OER) catalyst based on composite structure of MXene and metal-organic frameworks (MOFs) and synthesis method of catalyst
  • Oxygen evolution reaction (OER) catalyst based on composite structure of MXene and metal-organic frameworks (MOFs) and synthesis method of catalyst
  • Oxygen evolution reaction (OER) catalyst based on composite structure of MXene and metal-organic frameworks (MOFs) and synthesis method of catalyst

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Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1 The preparation method of the composite nanocatalyst based on MXene and NiFe-BDC MOFs

[0034] 1) Disperse MXene in water at normal temperature and pressure to prepare 2 mL of 10 mg mL -1 the dispersion liquid;

[0035] 2) Dissolve 1.0mmol of nickel acetate, 0.2mmol of iron nitrate and 1.2mmol of terephthalic acid in 30mL of N,N-dimethylformamide (DMF) and 2mL of ethanol at normal temperature and pressure to form a homogeneous solution;

[0036] 3) uniformly mixing the MXene dispersion prepared in step 1) with the metal salt / organic ligand solution prepared in step 2) at normal temperature and pressure;

[0037] 4) Add 0.8 mL of acid-binding agent triethylamine to the mixed solution prepared in step 3) at normal temperature and pressure, and react for 2 hours under stirring conditions. After the reaction, use ethanol to centrifugally wash, and then vacuum-dry.

[0038] The obtained product is a two-dimensional nanosheet with an average size of about 100-5...

Embodiment 2

[0039] Example 2 Preparation method of composite nanocatalyst based on MXene and NiCo-BDC MOFs

[0040] 1) Disperse MXene in water at normal temperature and pressure to prepare 2 mL of 5 mg mL -1 the dispersion liquid;

[0041]2) Dissolve 0.6mmol of nickel chloride, 0.6mmol of cobalt chloride and 1.2mmol of terephthalic acid in 30mL of N,N-dimethylformamide (DMF) and 2mL of ethanol at normal temperature and pressure to form a homogeneous solution;

[0042] 3) uniformly mixing the MXene dispersion prepared in step 1) with the metal salt / organic ligand solution prepared in step 2) at normal temperature and pressure;

[0043] 4) Add 0.5 mL of acid-binding agent triethylamine to the mixed solution prepared in step 3) at normal temperature and pressure, and react under stirring conditions for 2 h. After the reaction, use ethanol to wash centrifugally, and then vacuum-dry.

[0044] The obtained product is a two-dimensional nanosheet with an average size of about 100-500nm and load...

Embodiment 3

[0045] Example 3 Preparation method of composite nanocatalyst based on MXene and NiMn-BDC MOFs

[0046] 1) Disperse MXene in water at normal temperature and pressure to prepare 2mL with a concentration of 15mg mL -1 the dispersion liquid;

[0047] 2) Dissolve 0.2mmol of nickel acetate, 1.0mmol of manganese nitrate and 1.2mmol of terephthalic acid in 28mL of N,N-dimethylformamide (DMF) and 4mL of ethanol at normal temperature and pressure to form a homogeneous solution;

[0048] 3) uniformly mixing the MXene dispersion prepared in step 1) with the metal salt / organic ligand solution prepared in step 2) at normal temperature and pressure;

[0049] 4) Add 1.0 mL of acid-binding agent triethylamine to the mixed solution prepared in step 3) at normal temperature and pressure, and react for 4 hours under stirring conditions. After the reaction, use ethanol to wash centrifugally, and then vacuum-dry.

[0050] The obtained product is a two-dimensional nanosheet with an average size o...

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Abstract

The invention discloses an oxygen evolution reaction (OER) catalyst based on a composite structure of MXene and metal-organic frameworks (MOFs) and a synthesis method of the catalyst and belongs to the fields of nano materials, energy and catalysis. The catalyst is prepared from MXene two-dimensional nanosheets uniformly loaded with MOFs nanoparticles on the surfaces, and has a two-dimensional structure. The preparation method comprises the following steps: dissolving and uniformly mixing MXene, metal salt, an organic ligand and an acid-binding agent, then centrifuging, washing, and carrying out vacuum drying to obtain an electrocatalyst with a two-dimensional nanostructure with finely-adjustable structure and components. The oxygen evolution reaction catalyst and the synthesis method of the catalyst disclosed by the invention have the beneficial effects that the basic difficulty of failed catalytic property of an oxygen evolution reaction due to poor conductivity and stability of theMOFs can be effectively overcome; the obtained oxygen catalyst shows excellent catalytic activity and stability to the oxygen evolution reaction in alkaline electrolyte and lays a foundation for wideapplication of new-energy technologies such as fuel cells, metal-air batteries and electrolytic water.

Description

technical field [0001] The invention belongs to the field of nanomaterials, energy and catalysis, and relates to an oxygen evolution reaction catalyst based on a composite structure of MXene and a metal-organic framework compound and a synthesis method thereof. Background technique [0002] Fuel cells, metal-air batteries, and electrolyzed water with oxygen evolution reaction (OER) as the core reaction are currently one of the most promising new renewable energy storage and conversion technology systems. The oxygen evolution reaction involves a four-electron transfer process, the reaction energy barrier is high, and the kinetic rate of the process is slow. High-efficiency catalysts are required to improve its energy conversion efficiency. RuO 2 and IrO 2 etc. are currently the most active catalysts, but the scarcity of resources and high cost limit their large-scale application. The development of cheap, efficient, and stable non-precious metal oxygen evolution reaction c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J35/00B01J35/02
CPCB01J31/1691B01J31/2239B01J2531/842B01J2531/847B01J2531/845B01J2531/72B01J35/33B01J35/00B01J35/30B01J35/40
Inventor 王治宇邱介山孙富
Owner DALIAN UNIV OF TECH
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