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Preparation method of sulfur-doped nickel, iron, cobalt ternary hydroxide high-performance oxygen evolution catalyst with stepped three-dimensional structure

A three-dimensional structure and hydroxide technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems that have not been reported before, and achieve good process repeatability, cheap and easy-to-obtain raw materials, The effect of high oxygen evolution reaction activity

Active Publication Date: 2022-05-17
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the preparation of sulfur-doped nickel, iron, cobalt ternary metal hydroxides by hydrothermal method has not been reported

Method used

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  • Preparation method of sulfur-doped nickel, iron, cobalt ternary hydroxide high-performance oxygen evolution catalyst with stepped three-dimensional structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[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 vigorously and stirred at 80 ° C for 48 h, and the obtained precipitate was centrifuged and dried at 60 ° C for 24 h to obtain the desired precursor. 80mg precursor and 0.1125g thioacetamide (CH 3 CSNH 2 ) was dissolved in 40mL of ethanol, solvothermally reacted at 120°C for 6h, centrifuged the obtained precipitate, and dried at 60°C for 24h to obtain a sulfur-doped nickel, iron, cobalt ternary hydroxide with a ladder stereostructure with high performance Oxygen evolution catalyst, electrochemical test results show that its current density reaches 10mA cm -2 , the overpotential is only 200mV, and the Tafel slope is as sma...

Embodiment 2

[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 80 ° C for 48 h, and the obtained precipitate was centrifuged and dried at 60 ° C for 24 h to obtain the desired precursor. 80mg precursor and 0.1125g thioacetamide (CH 3 CSNH 2 ) was dissolved in 40mL ethanol, solvothermally reacted at 100°C for 6h, centrifuged the obtained precipitate, and dried at 60°C for 24h to obtain a sulfur-doped nickel, iron, cobalt ternary hydroxide with a ladder stereostructure with high performance Oxygen evolution catalyst, electrochemical test results show that its current density reaches 10mA cm -2 , the overpotential is only 200mV, and the Tafel slope is as small ...

Embodiment 3

[0018] 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 80 ° C for 48 h, and the obtained precipitate was centrifuged and dried at 60 ° C for 24 h to obtain the desired precursor. 80mg precursor and 0.1125g thioacetamide (CH 3 CSNH 2 ) was dissolved in 40mL of ethanol, solvothermally reacted at 140°C for 6h, centrifuged the obtained precipitate, and dried at 60°C for 24h to obtain a sulfur-doped nickel, iron, cobalt ternary hydroxide with a ladder stereostructure with high performance Oxygen evolution catalyst, electrochemical test results show that its current density reaches 10mA cm -2 , the overpotential is only 200mV, and the Tafel slope is as sma...

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Abstract

The invention relates to a preparation method of a sulfur-doped nickel, iron, cobalt ternary hydroxide high-performance oxygen evolution catalyst with a stepped three-dimensional structure. A method for converting a precursor into a sulfur-doped nickel, iron, cobalt ternary hydroxide high-performance oxygen evolution catalyst with a stepped three-dimensional structure, the method obtains a sulfur-doped nickel, iron, cobalt ternary hydroxide with a stepped three-dimensional structure High performance oxygen evolution catalyst. High reactivity, good conductivity, and high stability under alkaline conditions. The material preparation method of the invention is simple and simple, and the equipment is simple; the raw material is cheap and the repeatability is good.

Description

technical field [0001] The invention relates to a preparation method of a sulfur-doped nickel, iron, cobalt ternary hydroxide high-performance oxygen evolution catalyst with a stepped three-dimensional structure. Precursor transformed into a sulfur-doped nickel, iron, cobalt ternary hydroxide high-performance oxygen evolution catalyst with large specific surface area and many active sites. The obtained sulfur-doped nickel, iron, cobalt ternary metal hydroxide The material catalyst has the advantages of high oxygen evolution reaction activity, good electrical conductivity, and high stability under alkaline conditions. 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] Noble metal-based catalysts are the most effective OER catalysts...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/091C25B1/04
CPCB01J27/043B01J35/0033B01J37/10C25B1/04C25B11/091Y02E60/36
Inventor 郭志岩李明王友配王思清杜芳林
Owner QINGDAO UNIV OF SCI & TECH
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