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Bimetallic sulfide composite electrocatalyst and preparation method and application thereof

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 effects of high hydrophilicity, large specific surface area, and shortened path

Active Publication Date: 2020-01-17
SHANGHAI JIAO TONG 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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  • Bimetallic sulfide composite electrocatalyst and preparation method and application thereof
  • Bimetallic sulfide composite electrocatalyst and preparation method and application thereof
  • Bimetallic sulfide composite electrocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of a bimetallic sulfide composite electrocatalyst, comprising the steps of:

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

[0034] (2) 10mg of thiourea and 383mg of Co(NO 3 )·6H 2 O was dissolved in 36mL of deionized water, stirred into a transparent solution and placed in a 50mL hydrothermal kettle with nickel foam (NF), and reacted for 12h at a temperature of 453K. After the hydrothermal reaction was completed and naturally cooled to room temperature, the reactant Rinse several times with deionized water and absolute ethanol. Finally, the reacted...

Embodiment 2

[0036] A preparation method of a bimetallic sulfide composite electrocatalyst, comprising the steps of:

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

[0038] (2) 50mg of thiourea and 383mg of Co(NO 3 )·6H 2 O was dissolved in 36mL of deionized water, stirred into a transparent solution and placed in a 50mL hydrothermal kettle with nickel foam (NF), and reacted for 12h at a temperature of 453K. After the hydrothermal reaction was completed and naturally cooled to room temperature, the reactant Rinse several times with deionized water and absolute ethanol. Finally, the reacte...

Embodiment 3

[0042] A preparation method of a bimetallic sulfide composite electrocatalyst, comprising the steps of:

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

[0044] (2) 100mg of thiourea and 383mg of Co(NO 3 )·6H 2 O was dissolved in 36mL of deionized water, stirred into a transparent solution and placed in a 50mL hydrothermal kettle with nickel foam (NF), and reacted for 12h at a temperature of 453K. After the hydrothermal reaction was completed and naturally cooled to room temperature, the reactant Rinse several times with deionized water and absolute ethanol. Finally, the react...

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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 nanomaterial preparation and hydrogen production by splitting water, and relates to a bimetallic sulfide composite electrocatalyst and its preparation method and application. Background technique [0002] With the increasingly severe environmental and energy crises, people are constantly looking for clean and sustainable alternative energy sources. Hydrogen has been recognized as the most ideal renewable energy. Electrocatalytic water splitting for hydrogen production is one of the most promising solutions so far. Among them, the efficiency of the oxygen evolution reaction (OER) is one of the key factors affecting the electrocatalytic water splitting for hydrogen production. Since OER is a slow reaction, a higher current density is required to drive it. It has been proven that ruthenium-based catalysts (such as RuO 2 ) and iridium-based catalysts (such as IrO 2 ) and other noble metal-based electroca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043B01J35/02B01J35/10C25B1/04C25B11/06
CPCB01J27/043C25B1/04C25B11/04B01J35/33B01J35/40B01J35/615Y02E60/36
Inventor 潘云翔刘鹏彭行翠
Owner SHANGHAI JIAO TONG UNIV
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