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Preparation method and application of metal-organic framework compound electrocatalyst

A metal-organic framework, compound electrotechnology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve excellent cycle stability, accelerated kinetics, good The effect of adsorption performance

Inactive Publication Date: 2020-04-10
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although great progress has been made in OER catalytic activity, catalysts are still required to have good cycle stability in large-scale practical applications. 2 ) cycle for more than ten hours or tens of hours, very few catalysts have a high current density (100mA / cm 2 ) cycle for more than 100 hours, considering the economic efficiency, the stability of the catalyst at high current density is more important when electrolyzing water

Method used

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  • Preparation method and application of metal-organic framework compound electrocatalyst
  • Preparation method and application of metal-organic framework compound electrocatalyst
  • Preparation method and application of metal-organic framework compound electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Preparation of three-dimensional self-supporting metal organic framework compound FeNi-MOF / NF

[0043] (1) According to 0.1802g FeCl 3 ·6H 2 O and 0.0969g Ni(NO 3 )2·6H 2 O, be dissolved in the methyl alcohol of 7mL and obtain A solution, 0.1501g tartaric acid is dissolved in the methanol of 7mL and obtain B solution;

[0044] (2) Add solution B to solution A, adjust the pH of the solution to 3 with 1M NaOH methanol solution, and transfer it to a 20mL reaction kettle after stirring evenly;

[0045] (3) Wash the 1×2cm 2 Put the foamed nickel into the reactor vertically, put it in an oven at 130°C for 7 hours, and cool it naturally;

[0046] (4) rinse the foamed nickel after the reaction with ethanol, and vacuum-dry at 60° C.;

[0047] (5) Electrochemical test: in a three-electrode system (the electrode of the metal organic framework compound FeNi-MOF / NF prepared in step (4) is used as a working electrode, the silver / silver chloride electrode is used as a r...

Embodiment 2

[0048] Example 2: Preparation of three-dimensional self-supporting metal organic framework compounds Fe-MOF / NF and Ni-MOF / NF

[0049] (1) According to 0.1802g FeCl 3 ·6H 2 O(0.0969g Ni(NO 3 ) 2 ·6H 2 0) be dissolved in the methyl alcohol of 7mL and obtain A solution, and 0.1501g tartaric acid is dissolved in the methanol of 7mL and obtain B solution;

[0050] (2) Add solution B to solution A, adjust the pH of the solution to 3 with NaOH methanol solution, and transfer it to a 20mL reaction kettle after stirring evenly;

[0051] (3) Wash the 1x2cm with 1M HCl, ethanol, deionized water 2 Put the foamed nickel into the reactor vertically, put it in an oven at 130°C for 7 hours, and cool it naturally;

[0052] (4) Rinse the reacted nickel foam with ethanol, and vacuum-dry at 60°C.

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Abstract

The invention discloses a preparation method and an application of a metal-organic framework compound electrocatalyst. The preparation method comprises the following steps: respectively dissolving tartaric acid, FeCl3. 6H2O and Ni(NO3)2. 6H2O in methanol; mixing above two obtained solutions, and transferring the obtained mixture into a reaction kettle; vertically putting foamed nickel into the reaction kettle, heating the reaction kettle to react, and naturally cooling the reaction kettle; and taking out the foamed nickel, washing the foamed nickel with ethanol, and carrying out vacuum drying.In a three-electrode system, the metal-organic framework compound electrocatalyst is directly placed in an electrolyte as a working electrode to carry out an electrocatalytic water decomposition oxygen evolution reaction. The three-position nanoflower-tartaric acid-iron and nickel bimetal-organic framework compound is formed through one-step wet chemical self-assembling by using the strong coordination capability of tartaric acid and taking the foamed nickel as a substrate, and the has ean xcellent electrocatalytic oxygen evolution activity and a very excellent cycling stability under a highcurrent density.

Description

technical field [0001] The invention relates to a preparation method and application of a high-efficiency oxygen evolution reaction electrocatalyst prepared by a wet chemical method, in particular to a preparation method and application of a metal-organic framework compound electrocatalyst (referred to as FeNi-MOF / NF), which belongs to three-dimensional self-supporting Technical field of metal organic framework compound materials. Background technique [0002] The ever-increasing consumption of fossil fuels and deteriorating ecological problems are prompting our continuous exploration of renewable and clean energy sources, such as metal-air batteries, fuel cells, and water electrolysis devices. Electrocatalytic water splitting is considered as a promising method for sustainable, safe and environmentally friendly hydrogen fuel energy, promising to solve the current energy crisis. The water-splitting reaction can be divided into two half-reactions occurring on the electrode, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J35/00B01J35/02C25B1/04C25B11/06
CPCB01J31/1691B01J31/2239C25B1/04B01J2531/842B01J2531/847C25B11/075B01J35/50B01J35/33Y02E60/36
Inventor 闵宇霖罗诗文高申申时鹏辉范金辰徐群杰
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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