Preparation method of granular nickel iron cobalt ternary metal hydroxide high-performance oxygen evolution catalyst

A ternary metal and hydroxide technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of unreported preparation methods and achieve The reaction parameters are easy to control, the process repeatability is good, the effect of easy scale-up and industrial production

Inactive Publication Date: 2019-12-13
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there has been no report on the preparation method of high-performance oxygen evolution catalysts synthesized by hydrothermal method with granular nickel, iron, cobalt ternary metal hydroxides

Method used

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  • Preparation method of granular nickel iron cobalt ternary metal hydroxide high-performance oxygen evolution catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Take by weighing 5.463g nickel nitrate (H 12 N 2 NiO 12 ) and 2.517g ferric nitrate (H 18 FeN 3 o 18 ) and 0.604g cobalt nitrate (CoH 12 N 2 o 12 ) was dissolved in 30mL deionized water, 2.304g sodium hydroxide (NaOH) and 2.544g sodium carbonate (NaOH) 2 CO 3 ) was dissolved in 30 mL of deionized water, and the two solutions were mixed and stirred vigorously, then reacted under hydrothermal conditions at 80°C for 48h, and the obtained precipitate was centrifuged and dried at 60°C for 24h. The obtained high-performance oxygen evolution catalyst with granular nickel, iron and cobalt ternary metal hydroxide has many exposed active sites, and its current density reaches 10mA·cm -2 , the overpotential is only 230mV, and the Tafel slope is as small as 72.7mV·dec -1 .

Embodiment 2

[0014] Take by weighing 5.463g nickel nitrate (H 12 N 2 NiO 12 ) and 2.517g ferric nitrate (H 18 FeN 3 o 18 ) and 0.604g cobalt nitrate (CoH 12 N 2 o 12 ) was dissolved in 30mL deionized water, 2.304g sodium hydroxide (NaOH) and 2.544g sodium carbonate (NaOH) 2 CO 3 ) was dissolved in 30 mL of deionized water, and then the two solutions were mixed and stirred vigorously, reacted at 70°C for 48h, and the obtained precipitate was centrifuged and dried at 60°C for 24h. The obtained high-performance oxygen evolution catalyst with granular nickel, iron and cobalt ternary metal hydroxide has many exposed active sites, and its current density reaches 10mA·cm -2 , the overpotential is only 230mV, and the Tafel slope is as small as 72.7mV·dec -1 .

Embodiment 3

[0016] Take by weighing 5.463g nickel nitrate (H 12 N 2 NiO 12 ) and 2.517g ferric nitrate (H 18 FeN 3 o 18 ) and 0.604g cobalt nitrate (CoH 12 N 2 o 12 ) was dissolved in 30mL deionized water, 2.304g sodium hydroxide (NaOH) and 2.544g sodium carbonate (NaOH) 2 CO 3 ) was dissolved in 30 mL of deionized water, and then the two solutions were mixed vigorously and stirred at 90°C for 48h, and the obtained precipitate was centrifuged and dried at 60°C for 24h. The obtained high-performance oxygen evolution catalyst with granular nickel, iron and cobalt ternary metal hydroxide has many exposed active sites, and its current density reaches 10mA·cm -2 , the overpotential is only 230mV, and the Tafel slope is as small as 72.7mV·dec -1 .

[0017] From the nickel, iron, cobalt ternary metal hydroxide catalyst test result that the present invention makes, the nickel, iron, cobalt ternary metal hydroxide catalyst that the present invention obtains has oxygen evolution activity...

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Abstract

The invention relates to a preparation method of a granular nickel iron cobalt ternary metal hydroxide high-performance oxygen evolution catalyst, particularly to one-step synthesis by hydrothermal process. The specific preparation process includes: weighing 5.463g of nickel nitrate (H12N2NiO12), 2.517g of ferric nitrate (H18FeN3O18) and 0.604g of cobalt nitrate (CoH12N2O12), and dissolving the substances in 30mL of deionized water, dissolving 2.304g of sodium hydroxide (NaOH) and 2.544g of sodium carbonate (Na2CO3) in 30mL of deionized water, then intensely stirring the two solutions, carrying out reaction at 70-90DEG C under a hydrothermal condition for 48h, centrifuging the obtained precipitate, and performing drying at 60DEG C for 24h. The obtained granular nickel iron cobalt ternary metal hydroxide oxygen evolution catalyst has the advantages of high oxygen evolution activity, good electrical conductivity, high stability under alkaline conditions and the like. The preparation method of the material provided by the invention is simple, and equipment is simple; the raw materials are low in price, and the repeatability is good.

Description

technical field [0001] The invention relates to a method for preparing a high-performance oxygen evolution catalyst with granular nickel, iron, and cobalt ternary metal hydroxides, in particular to a method for synthesizing granular nickel, iron, and Cobalt ternary metal hydroxide high-performance oxygen evolution catalyst method, the obtained granular nickel, iron, cobalt ternary metal hydroxide high-performance oxygen evolution catalyst has high oxygen evolution catalytic activity, good conductivity, and alkaline conditions The advantages of high stability. Background technique [0002] High-efficiency catalysts with large specific surface area and many exposed active sites are materials that can reduce overpotential. They have important applications in fuel cells, solar cells, metal-air batteries, and the production of clean hydrogen fuels. [0003] In recent years, transition metal (Ni, Fe, Co,) compounds and alloys based on non-noble metals have become effective cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755H01M4/88H01M4/90C25B1/02C25B11/06
CPCB01J23/755B01J35/0033C25B1/02C25B11/075H01M4/8825H01M4/9016Y02E60/50
Inventor 郭志岩王友配李明王思清杜芳林
Owner QINGDAO UNIV OF SCI & TECH
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