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Preparation method and application of a nickel-based three-dimensional metal-organic framework catalyst

A technology of metal-organic frameworks and catalysts, applied in the fields of metal-organic framework materials, nanomaterials, and nanocatalysis, can solve the problems of limited practical applications, high prices, scarcity, etc., and achieve enhanced electrical conductivity and oxygen evolution catalytic performance, stability Good performance and easy industrialization

Inactive Publication Date: 2020-10-09
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, their scarcity and high price limit their wide practical applications. Therefore, it is an opportunity and a challenge to develop efficient, cheap and earth-abundant non-precious metal oxygen evolution catalysts to reduce the electricity consumption of oxygen evolution.

Method used

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  • Preparation method and application of a nickel-based three-dimensional metal-organic framework catalyst
  • Preparation method and application of a nickel-based three-dimensional metal-organic framework catalyst
  • Preparation method and application of a nickel-based three-dimensional metal-organic framework catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1 A method for preparing nickel-based three-dimensional metal-organic frameworks

[0031] The activated nickel foam with an area of ​​0.5 cm × 1 cm was placed in a mixed solution consisting of 10 mL of water, 0.270 g of sodium sulfate and 40 μL of aniline, and electrodeposited for 25 min to obtain a composite material in which polyaniline was supported on foamed nickel, namely Ni@ PANI composite material;

[0032] 0.045g H 3 The L ligand was dissolved in a mixed solution of 1mL DMF, 0.2mL absolute ethanol and 0.1mL water, then 0.025g cobalt nitrate was added, and Co(II)-MOF gel was prepared after ultrasonication;

[0033] 12 μL Co(II)-MOF gel was evenly coated on the Ni@PANI composite material, placed in a tube furnace, heated to 230 °C at a heating rate of 2 °C / min under air atmosphere, kept for 2 h, and then , cooled to room temperature at a cooling rate of 2°C / min; Ni@Co 2 o 3 / CN composite catalyst, that is, a nickel-based three-dimensional metal-organic...

Embodiment 2

[0039] Example 2 A method for preparing nickel-based three-dimensional metal-organic frameworks

[0040] The activated nickel foam with an area of ​​0.5 cm × 1 cm was placed in a mixed solution consisting of 10 mL of water, 0.290 g of sodium sulfate and 52 μL of aniline, and electrodeposited for 35 min to obtain a composite material in which polyaniline was loaded on foamed nickel, namely Ni@ PANI composite; 0.055g H 3 The L ligand was dissolved in a mixed solution of 1mL DMF, 0.2mL absolute ethanol and 0.1mL water, then 0.035g cobalt nitrate was added, and Co(II)-MOF gel was prepared after ultrasonication;

[0041] 15 μL of Co(II)-MOF gel was evenly coated on the Ni@PANI composite material, placed in a tube furnace, heated to 270 °C at a heating rate of 2 °C / min under an air atmosphere, kept for 2 h, and then , cooled to room temperature at a cooling rate of 2°C / min; Ni@Co 2 o 3 / CN composite catalyst, that is, a nickel-based three-dimensional metal-organic framework catal...

Embodiment 3

[0047] Example 3 A method for preparing a nickel-based three-dimensional metal-organic framework catalyst

[0048] The activated nickel foam with an area of ​​0.5 cm × 1 cm was placed in a mixed solution consisting of 10 mL of water, 0.280 g of sodium sulfate and 46 μL of aniline, and electrodeposited for 30 min to obtain a composite material in which polyaniline was loaded on foamed nickel, namely Ni@ PANI composite; mix 0.050g H 3 The L ligand was dissolved in a mixed solution of 1mL DMF, 0.2mL absolute ethanol and 0.1mL water, then 0.030g cobalt nitrate was added, and Co(II)-MOF gel was prepared after ultrasonication;

[0049] 14 μL of Co(II)-MOF gel was evenly coated on the Ni@PANI composite material, placed in a tube furnace, heated to 250 °C at a heating rate of 2 °C / min under an air atmosphere, kept for 2 h, and then , cooled to room temperature at a cooling rate of 2°C / min; Ni@Co 2 o 3 / CN composite catalyst, that is, a nickel-based three-dimensional metal-organic f...

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Abstract

The invention discloses a preparation method of a catalyst based on a nickel-based three-dimensional metal organic frame substance and an application of oxygen evolution by water electrolysis based onthe catalyst, and belongs to the technical field of nanomaterials, nano catalysis and metal organic frame substance materials. The method mainly comprises the steps of performing electro-deposition on polyaniline with foamed nickel to form a Ni@PANI composite, applying gel prepared from a ligand H3TATAB and cobalt nitrate on the Ni@PANI composite, and heating in an air atmosphere to form a Ni@Co2O3 / CN composite catalyst, namely the catalyst based on the nickel-based three-dimensional metal organic frame substance. Raw materials used for preparation of the catalyst are low in cost; a preparation technology is simple; the reaction energy consumption is low; and the catalyst has industrial application prospects. The catalyst is used for efficient catalysis of water electrolysis for oxygen evolution and has good oxygen evolution electrocatalytic activity and electrochemical stability.

Description

technical field [0001] The invention relates to a preparation method of a nickel-based three-dimensional metal-organic framework catalyst and an application of the catalyst to electrolyze water for oxygen evolution, and belongs to the technical fields of nanomaterials, nanocatalysis and metal-organic framework materials. Background technique [0002] With the rapid development of social economy and the continuous growth of the world population, air pollution caused by fossil fuel combustion and global climate change have become increasingly concerned issues. Effective electrochemical energy conversion and storage such as fuel cells, metal-air batteries, and electrolyzed water Technology is increasingly relevant. In order to meet the requirements of new energy consumption and the improvement of the quality of life of the existing population, all countries in the world urgently need to find sustainable and clean energy carriers. Electrocatalytic direct water splitting to prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28C25B11/06C25B1/04
CPCB01J31/28C25B1/04C25B11/04Y02E60/36
Inventor 赵璐王志玲骆玉成崔玉杨小风郑鲁沂
Owner UNIV OF JINAN
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