Ferronickel hydroxide/reduction-oxidation graphene electrochemical oxygen evolution catalyst with nickel foam as carrier and preparation method of ferronickel hydroxide/reduction-oxidation graphene electrochemical oxygen evolution catalyst

An electrochemical technology of hydroxide and olefin, applied in the field of electrocatalytic materials, can solve the problems of increasing catalyst resistance, complex preparation process, unfavorable catalytic performance, etc., achieve simple preparation method, ensure stability, and avoid electrode preparation process Effect

Inactive Publication Date: 2018-10-26
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the current oxygen evolution catalysts are powder materials, which are then coated on the substrate, but the preparation process is complicated, the stability is low, and the added binder will also increase the resistance of the catalyst, which is not conducive to its catalytic performance.

Method used

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  • Ferronickel hydroxide/reduction-oxidation graphene electrochemical oxygen evolution catalyst with nickel foam as carrier and preparation method of ferronickel hydroxide/reduction-oxidation graphene electrochemical oxygen evolution catalyst
  • Ferronickel hydroxide/reduction-oxidation graphene electrochemical oxygen evolution catalyst with nickel foam as carrier and preparation method of ferronickel hydroxide/reduction-oxidation graphene electrochemical oxygen evolution catalyst

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Experimental program
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Effect test

Embodiment 1

[0023] Preparation of nickel iron hydroxide / reduced graphene oxide electrochemical oxygen evolution catalyst supported by nickel foam

[0024] Nickel foam was treated with acetone, ethanol, and deionized water ultrasonically for 30 minutes to remove impurities on the surface of nickel foam. o C, dry under the condition of 10h for use; then weigh 1mmol nickel nitrate, 8mmol urea and dissolve in 46ml deionized water, stir at room temperature to obtain a uniform mixed solution; then add 4ml to the mixed solution, the concentration is 5mg L -1 Graphene oxide solution was ultrasonically treated in an ultrasonic pool for 30 minutes to obtain a uniformly dispersed mixed solution; the clean nickel foam and the mixed solution were transferred to a 100ml hydrothermal kettle and sealed at 200 o Under the condition of C, react for 12h; Clean the foam nickel after reaction with ethanol and deionized water, place in 60 o Dry in an oven at C; then soak in 10mmol L -1 8h in ferric nitrate, ...

Embodiment 2

[0026] Preparation of nickel hydroxide / reduced graphene oxide electrochemical oxygen evolution catalyst supported by nickel foam

[0027] Nickel foam was treated with acetone, ethanol, and deionized water for ultrasonic treatment for 15 minutes to remove impurities on the surface of nickel foam, 60 o C, dry under the condition of 10h for use; then weigh 0.5mmol nickel chloride, 2.5mmol urea and dissolve in 48ml deionized water, stir at room temperature to obtain a uniform mixed solution;

[0028] Then add 2 ml to the mixture, the concentration is 5 mg L -1 Graphene oxide solution was ultrasonically treated in an ultrasonic pool for 30 minutes to obtain a uniformly dispersed mixed solution; the clean nickel foam and the mixed solution were transferred to a 100ml hydrothermal kettle and sealed, and reacted for 24h at 120°C; Ethanol and deionized water cleaned the foamed nickel after the reaction, and placed it at 80 o Dried in the oven of C; do not do the impregnation treatmen...

Embodiment 3

[0030] Preparation of nickel iron hydroxide / reduced graphene oxide electrochemical oxygen evolution catalyst supported by nickel foam

[0031] Nickel foam was treated with acetone, ethanol, and deionized water ultrasonically for 30 minutes to remove impurities on the surface of nickel foam, 70 o C, dry under the condition of 10h for use; then weigh 0.25mmol nickel citrate, 2mmol urea and dissolve in 27ml deionized water, stir at room temperature to obtain a uniform mixed solution;

[0032] Then add 3ml to the mixture, the concentration is 5mg L -1 Graphene oxide solution was ultrasonically treated in an ultrasonic pool for 30 minutes to obtain a uniformly dispersed mixed solution; the clean nickel foam and the mixed solution were transferred to a 50ml hydrothermal kettle and sealed, and reacted for 15h at 120°C; Ethanol and deionized water cleaned the foamed nickel after the reaction, and placed it at 70 o Dry in an oven at C; then soak in 5mmol L -1 ferric citrate for 24 h...

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Abstract

The invention relates to a ferronickel hydroxide/reduction-oxidation graphene electrochemical oxygen evolution catalyst with nickel foam as a carrier and a preparation method of the ferronickel hydroxide/reduction-oxidation graphene electrochemical oxygen evolution catalyst. The nickel foam is used as the carrier of the catalyst, ferric hydroxide, nickel hydroxide or a compound of the ferric hydroxide and the nickel hydroxide is used as the active component of the catalyst, and reduction-oxidation graphene is used as the conductive material of the catalyst. The catalyst is prepared through a water heating and impregnation method. Firstly, the nickel foam is subjected to ultrasonic cleaning and drying; then, a certain amount of nickel salt and a certain amount of urea are weighed, dissolvedin deionized water and stirred to be evenly mixed at the room temperature; then, oxidized graphene is added, ultrasonic treatment is conducted, and evenly-dispersed mixed liquor is obtained; the nickel foam and the mixed liquor are transferred into a water heating kettle and react for 12 h to 24 h at the temperature being 120-200 DEG C; the nickel foam subjected to reaction is cleaned and dried;and finally, after the nickel foam is soaked in an iron salt solution with the concentration ranging from 5 mmol/L to 30 mmol/L for 0 h to 48 h, cleaning and drying are conducted, and the ferronickelhydroxide/reduction-oxidation graphene electrochemical oxygen evolution catalyst with the nickel foam as the carrier is obtained. The catalyst is good in catalysis activity and high in stability; andthe preparation method is simple and controllable, and industrial popularization is facilitated.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic materials, and in particular relates to a nickel-iron hydroxide / reduced graphene oxide electrochemical oxygen evolution catalyst with nickel foam as a carrier and a preparation method thereof. Background technique [0002] With the massive burning of fossil energy, environmental pollution and energy crisis have attracted more and more attention. Therefore, we urgently need a new, renewable, non-polluting, and sustainable new energy source to replace traditional fossil fuels. [0003] In recent years, hydrogen has been considered as the most promising energy candidate due to its advantages of cleanliness and high efficiency, and the electrolysis of water to generate hydrogen (hydrogen evolution reaction) and oxygen (oxygen evolution reaction) is a very effective way. The process of oxygen evolution reaction in electrolyzed water is complex and the kinetics are slow, requiring more energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/03C25B11/06C25B1/04C23C18/12
CPCC23C18/1204C23C18/1262C25B1/04C25B11/031C25B11/091Y02E60/36
Inventor 邵丹敏李鹏威周亚楠
Owner EAST CHINA UNIV OF SCI & TECH
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