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Tremella-like fe-ni double metal hydroxide, oxygen evolution electrode and its preparation method and application

A hydroxide and oxygen evolution electrode technology, applied in the direction of electrochemical variables of materials, etc., to achieve the effects of good electrochemical reversibility, mild reaction conditions and short reaction time

Active Publication Date: 2018-05-25
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current oxygen evolution electrode has a large part of the energy consumption of the current oxygen evolution electrode in alkaline electrolysis due to hydrogen evolution overpotential and oxygen evolution overpotential

Method used

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  • Tremella-like fe-ni double metal hydroxide, oxygen evolution electrode and its preparation method and application
  • Tremella-like fe-ni double metal hydroxide, oxygen evolution electrode and its preparation method and application
  • Tremella-like fe-ni double metal hydroxide, oxygen evolution electrode and its preparation method and application

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preparation example Construction

[0025] The invention provides a preparation method of tremella-like Fe-Ni double metal hydroxide, comprising:

[0026] 1) mixing soluble iron salt, soluble nickel salt, surfactant and solvent to make salt solution;

[0027] 2) Carrying out redox reaction between the salt solution and the reducing agent until the reaction system changes color to obtain a reaction mixture;

[0028] 3) Separating the reaction mixture from solid to liquid to obtain a solid, and then washing, drying and grinding the solid to obtain a Fe-Ni double metal hydroxide.

[0029] In the step 1) of the invention, the amount of each material can be selected in a wide range, but in order to make the obtained Fe-Ni double metal hydroxide have more excellent electrochemical stability, cycle stability and OER catalytic performance , preferably, relative to 3 mmol of soluble iron salt, the amount of the soluble nickel salt is 1-9 mmol, the amount of the surfactant is 0.1-7 g, and the amount of the solvent is 5-6...

preparation example 1

[0053] Preparation of 50mg / ml sodium borohydride solution: accurately weigh 1g of sodium borohydride solid with a balance and put it into a beaker, accurately measure 20mL of ice water with a graduated cylinder, then pour the ice water into the beaker, stir to dissolve.

[0054] The configuration of 5mg / ml sodium borohydride solution: accurately weigh 0.1g of sodium borohydride solid with a balance and put it into a beaker, accurately measure 20mL of ice water with a measuring cylinder, then pour the ice water into the beaker and stir to dissolve.

preparation example 2

[0056] Configuration of 0.1mol / L ferric nitrate solution: accurately weigh 2.020g of ferric nitrate solid with a balance and put it into a beaker, take an appropriate amount of deionized water to dissolve, then use a glass rod to drain the solution in the beaker into a 50mL volumetric flask, and then Wash the beaker several times with deionized water and transfer the solution to the volumetric flask, and finally add distilled water dropwise to the scale line of the volumetric flask with a rubber dropper, shake well, and settle to volume.

[0057] Configuration of 1mol / L ferric nitrate solution: accurately weigh 20.20g of ferric nitrate solid with a balance and put it into a beaker, take an appropriate amount of deionized water to dissolve, then use a glass rod to drain the solution in the beaker into a 50mL volumetric flask, and then use Wash the beaker several times with deionized water and transfer the solution to a volumetric flask, and finally add distilled water dropwise t...

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Abstract

The invention discloses tremella-like Fe-Ni layered double hydroxides, an oxygen evolution electrode as well as preparation methods and applications thereof. The preparation method of the tremella-like Fe-Ni layered double hydroxides comprises steps as follows: 1), soluble ferric salt, soluble nickel salt, a surfactant and a solvent are mixed, and a salt solution is prepared; 2), the salt solution and a reducing agent have a redox reaction until a reaction system changes color, and a reaction mixture is prepared; 3), the reaction mixture is subjected to solid-liquid separation, solids are taken and then subjected to washing, drying and grinding, and the Fe-Ni layered double hydroxides are prepared. The Fe-Ni layered double hydroxides and the oxygen evolution electrode containing Fe-Ni layered double hydroxides have excellent electrochemical stability, cycling stability and OER (oxygen evolution reaction) catalytic performance; meanwhile, the preparation methods of the Fe-Ni layered double hydroxides and the oxygen evolution electrode are simple, conditions are mild, and the reaction efficiency is high.

Description

technical field [0001] The invention relates to double metal hydroxides, in particular to a tremella-like Fe-Ni double metal hydroxides. Background technique [0002] Fuel cells have the characteristics of high energy conversion efficiency and environmental friendliness, and are known as the preferred clean and efficient power generation technology in the 21st century. Bifunctional oxygen electrode materials used in fuel cells have recently become a research hotspot in the field of electrochemistry. For a long time, people have carried out research on a variety of electrocatalytic materials, mainly including the following materials: (1) noble metal materials, such as Pt, ( 2) single metal oxide, (3) composite metal oxide, (4) composite metal hydroxide. Among them, when the composite metal hydroxide material is used as an electrocatalyst material, it has low cost, strong corrosion resistance, high OER (oxygen evolution reaction) and ORR (oxidation-reduction reaction) electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
Inventor 耿保友张凯
Owner ANHUI NORMAL UNIV
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