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Amorphous cobalt borate-nickel monoselenide@foamed nickel compound as well as preparation method and application thereof

A nickel selenide, nickel foam technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve problems such as poor water splitting performance, and achieve excellent electrical conductivity, excellent hydrogen evolution and oxygen evolution. Electrocatalytic performance, effect of large application potential

Active Publication Date: 2020-09-18
咸阳瞪羚谷新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the existing electrocatalysts in acidic and neutral electrolytes that perform extremely poor water splitting performance, and to provide a composite of amorphous cobalt borate-nickel monoselenide@foam nickel, its preparation method and application

Method used

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  • Amorphous cobalt borate-nickel monoselenide@foamed nickel compound as well as preparation method and application thereof
  • Amorphous cobalt borate-nickel monoselenide@foamed nickel compound as well as preparation method and application thereof
  • Amorphous cobalt borate-nickel monoselenide@foamed nickel compound as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. First, a piece (1cm×1cm×1.5mm) of nickel foam was ultrasonically cleaned with dilute hydrochloric acid and water for 20 minutes to remove the original oxide layer of nickel foam; the surface density of the nickel foam was 280g. m -2 ;

[0038] 2. Place the processed nickel foam in the middle area of ​​the quartz tube of the tube furnace, place the selenium powder on the upstream of the quartz tube, introduce Ar continuously into the quartz tube at a rate of 100ppm, and set the temperature in the furnace to 600 ℃, set the heating rate to 10℃ / min, and the holding time to 1h, to obtain three-dimensional NiSe@Ni;

[0039] The loading mass of NiSe on the three-dimensional NiSe@Ni is 0.074mg. cm -2 ;

[0040] 3. Place the three-dimensional NiSe@Ni as a carrier on 3mMCo(NO 3 ) 2 ﹒ 6H 2 O aqueous solution, slowly add 0.5mM NaBH 4 Aqueous solution, stirred for 0.5h for reaction, after the reaction was completed, the reaction product was washed with a large amount of ...

Embodiment 2

[0047] 1. First, a piece (2cm × 2cm × 1.5mm) of nickel foam was ultrasonically cleaned with dilute hydrochloric acid and water for 40 minutes to remove the original oxide layer of nickel foam; the surface density of nickel foam was 350g m -2 ; 2. the nickel foam after the treatment is placed in the middle area of ​​the quartz tube in the reaction furnace, and the selenium powder (loading quality is 0.1mg cm -2 ) was placed upstream of the quartz tube, and Ar was continuously introduced into the quartz tube at a rate of 80ppm, and the temperature in the furnace was set to 700°C, the heating rate was set to 8°C / min, and the holding time was 1.5h to obtain a three-dimensional NiSe@Ni;

[0048] 3. Place the three-dimensional NiSe@Ni as a carrier on 1mMCo(NO 3 ) 2 ﹒ 6H 2 O aqueous solution, and slowly add 1mM NaBH 4 Aqueous solution, stirring for 1h to react, after the reaction is completed, the obtained reaction product is CoBO x -NiSe@Ni nanosheets; the reaction product was ...

Embodiment 3

[0051] 1. First, a piece of nickel foam (1.5cm×1.5cm×1.5mm) was ultrasonically cleaned with dilute hydrochloric acid and water for 60 minutes to remove the original oxide layer of nickel foam; the surface density of nickel foam was 400g m -2 ;

[0052] 2. The nickel foam after the treatment is placed in the middle area of ​​the quartz tube in the reaction furnace, and the selenium powder (the loading quality is 0.05mg cm -2 ) was placed upstream of the quartz tube, and Ar was continuously introduced into the reaction chamber at a rate of 120ppm, and the temperature in the furnace was set to 550°C, the heating rate was set to 9°C / min, and the holding time was 2h to obtain NiSe@Ni;

[0053] 3. Place the three-dimensional NiSe@Ni as a carrier on 2mMCo(NO 3 ) 2 ﹒ 6H 2 O aqueous solution, and slowly add 0.8mM NaBH to it 4 Aqueous solution, stirred for 2h to react, after the reaction was completed, the reaction product CoBO x NiSe@Ni nanosheets; the reaction product was washed...

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Abstract

The invention discloses an amorphous cobalt borate-nickel monoselenide@foamed nickel compound as well as a preparation method and application thereof, and belongs to the field of preparation of nano materials. According to the amorphous cobalt borate-nickel monoselenide@foamed nickel compound, in amorphous cobalt borate, electrons are reversely transferred from B to Co, so that a d-band track of Co is filled, a large number of active sites can be provided, reactants can move in all directions in the water decomposition reaction process due to the short-range orderliness, and the reaction flexibility is improved; and the nickel monoselenide and the amorphous cobalt borate have a synergistic effect, so that the nickel monoselenide and the amorphous cobalt borate not only can be used as a catalyst in an alkaline electrolyte to catalyze a full water decomposition process, but also can be used for catalyzing hydrogen evolution and oxygen evolution in acidic and neutral electrolytes at the same time. The compound provided by the invention has excellent hydrogen evolution and oxygen evolution double electrocatalytic properties in acidic, alkaline and neutral electrolytes.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, in particular to a composite of amorphous cobalt borate-nickel monoselenide@foam nickel, a preparation method and application. Background technique [0002] Reducing the consumption of fossil fuels and developing environmentally friendly energy sources have become international hot issues in this era. Due to its high energy, clean combustion products and renewable nature, hydrogen is an ideal alternative energy source for carbon-based fuels. Over the past few decades, the global scientific community has studied the splitting of water molecules to form hydrogen (H 2 )Reaction. However, conventional industrial hydrogen production methods have many problems, such as low purity and release of greenhouse gases. Based on this, hydrogen production by environmentally friendly water splitting is a cleaner and more efficient way, such as electrocatalysis, thermal catalysis, and photocatalysis. A...

Claims

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Application Information

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IPC IPC(8): B01J27/057B01J37/02B01J37/16B01J37/08C25B11/06C25B1/04
CPCB01J27/0573B01J37/0201B01J37/16B01J37/08C25B1/04B01J35/33Y02E60/36
Inventor 戴正飞梁婷婷张明真刘耀达
Owner 咸阳瞪羚谷新材料科技有限公司
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