A kind of bimetallic sulfide composite electrocatalyst and its preparation method and application

An electrocatalyst and sulfide technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effect of high hydrophilicity, large specific surface area, and shortened path

Active Publication Date: 2021-01-22
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are currently few bimetallic sulfide composite electrocatalysts for the electrocatalytic oxygen evolution (OER) reaction.

Method used

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  • A kind of bimetallic sulfide composite electrocatalyst and its preparation method and application
  • A kind of bimetallic sulfide composite electrocatalyst and its preparation method and application
  • A kind of bimetallic sulfide composite electrocatalyst and its preparation method and application

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Effect test

Embodiment 1

[0032]A method for preparing a bimetallic sulfide composite electrocatalyst includes the following steps:

[0033](1) First, set the area to 0.25cm2The nickel foam (NF) is soaked in acetone for 1h to remove impurities, and then treated with a 3mol / L hydrochloric acid aqueous solution for 2h to remove the surface nickel oxide layer. After the treatment, the foam nickel (NF) is washed with deionized water and ethanol, and finally placed It is dried in a vacuum drying oven at a temperature of 313k for 6-12 hours to obtain a pretreated foamed nickel sample.

[0034](2) Using hydrothermal method to combine 10mg thiourea and 383mg Co(NO3)2·6H2O was dissolved in 36mL of deionized water, stirred into a transparent solution and placed in a 50mL hydrothermal kettle together with foamed nickel (NF), reacted at a temperature of 453K for 12h, after the hydrothermal reaction was completed, it was naturally cooled to room temperature, the reactants Rinse it several times with deionized water and absolut...

Embodiment 2

[0036]A preparation method of a bimetallic sulfide composite electrocatalyst includes the following steps:

[0037](1) First set the area to 0.25cm2The nickel foam (NF) is soaked in acetone for 1h to remove impurities, and then treated with a 3mol / L hydrochloric acid aqueous solution for 2h to remove the surface nickel oxide layer. After the treatment, the foam nickel (NF) is washed with deionized water and ethanol, and finally placed It is dried in a vacuum drying oven at a temperature of 313k for 6-12 hours to obtain a pretreated foamed nickel sample.

[0038](2) Using hydrothermal method to combine 50mg thiourea and 383mg Co(NO3)2·6H2O was dissolved in 36mL of deionized water, stirred into a transparent solution and placed in a 50mL hydrothermal kettle together with foamed nickel (NF), reacted at a temperature of 453K for 12h, after the hydrothermal reaction was completed, it was naturally cooled to room temperature, the reactants Rinse it several times with deionized water and absolut...

Embodiment 3

[0042]A preparation method of a bimetallic sulfide composite electrocatalyst includes the following steps:

[0043](1) First set the area to 0.25cm2The nickel foam (NF) is soaked in acetone for 1h to remove impurities, and then treated with a 3mol / L hydrochloric acid aqueous solution for 2h to remove the surface nickel oxide layer. After the treatment, the foam nickel (NF) is washed with deionized water and ethanol, and finally placed It is dried in a vacuum drying oven at a temperature of 313k for 6-12 hours to obtain a pretreated foamed nickel sample.

[0044](2) 100mg thiourea and 383mg Co(NO3)2·6H2O was dissolved in 36mL of deionized water, stirred into a transparent solution and placed in a 50mL hydrothermal kettle together with foamed nickel (NF), reacted at a temperature of 453K for 12h, after the hydrothermal reaction was completed, it was naturally cooled to room temperature, the reactants Rinse it several times with deionized water and absolute ethanol. Finally, the reacted prod...

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Abstract

The invention relates to a bimetallic sulfide composite electrocatalyst and a preparation method and application thereof. The electrocatalyst comprises a foamed nickel substrate and bimetallic sulfides growing on the foamed nickel substrate to form a 2D nano structure, and the bimetallic sulfides are NiS / Co9S8; the preparation method comprises the following steps: 1) foamed nickel is pretreated; 2) thiourea and Co(NO3).6H2O are dissolved in water, then the pretreated foam nickel is added, hydrothermal reaction is carried out, and then cooling, washing and drying are carried out to obtain the bimetallic sulfide composite electrocatalyst; and the electrocatalyst is used in electrocatalytic oxygen evolution or electrocatalytic hydrogen evolution. Compared with the prior art, the preparation process of the electrocatalyst is simple, safe and cheap; the electrocatalyst is high in catalytic activity and low in reaction energy barrier, has more activand e sites, and shortens the path of electron transfer; and the specific surface area is large, the electron transfer efficiency is improved, and the long-time stability is realized.

Description

Technical field[0001]The invention belongs to the technical field of nano material preparation and water splitting to produce hydrogen, and relates to a bimetallic sulfide composite electrocatalyst and a preparation method and application thereof.Background technique[0002]With the increasingly severe environmental and energy crisis, people are constantly seeking clean and sustainable alternative energy sources. Hydrogen has been recognized as the most ideal renewable energy source. The electrocatalytic decomposition of water to produce hydrogen is one of the most valuable research projects so far. Among them, the efficiency of oxygen evolution reaction (OER) is one of the key factors affecting the electrocatalytic decomposition of water to produce hydrogen. Since OER is a slow response, it needs a higher current density to drive it. It has been proven that ruthenium-based catalysts (such as RuO2) And iridium-based catalysts (such as IrO2) And other noble metal-based electrocatalysts...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/043B01J35/02B01J35/10C25B1/04C25B11/091
CPCB01J27/043B01J35/0033B01J35/023B01J35/1019C25B1/04C25B11/04Y02E60/36
Inventor 潘云翔刘鹏彭行翠
Owner SHANGHAI JIAOTONG UNIV
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