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Nitrogen-doped carbon-coated Ni&MoO2 ultrafine nanowire and preparation method and application thereof

A nitrogen-doped carbon and ultra-fine nanotechnology, which is applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve problems such as limiting the catalytic activity of hydrogen evolution reaction, less active sites, and agglomeration. Achieve excellent hydrogen evolution reaction catalytic activity and durability, improve catalytic activity, and improve acid resistance

Active Publication Date: 2018-02-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recent studies have found that both Mo atom edges and O atom edges are catalytically active sites, but MoO 2 There are severe agglomeration and few active sites, which severely limit its catalytic activity for hydrogen evolution reaction

Method used

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  • Nitrogen-doped carbon-coated Ni&MoO2 ultrafine nanowire and preparation method and application thereof
  • Nitrogen-doped carbon-coated Ni&MoO2 ultrafine nanowire and preparation method and application thereof
  • Nitrogen-doped carbon-coated Ni&MoO2 ultrafine nanowire and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Nitrogen-doped carbon-coated Ni and MoO grown on carbon cloth 2 A method for preparing a composite nanowire material of nanoparticles, comprising the steps of:

[0038] 1) First, take 0.3g of ammonium molybdate tetrahydrate, 0.2g of nickel nitrate hexahydrate and 0.5g of 2-methylimidazole, and sequentially add them to 40mL of methanol solvent, and stir to obtain a homogeneous solution;

[0039] 2) Transfer the solution obtained in step 1) to a 50mL reactor, and vertically place a 20.0mm×30.0mm carbon cloth in it, and conduct solvothermal reaction at 160°C for 24h;

[0040] 3) After cooling down to room temperature, take out the carbon cloth sample from the reaction kettle in step 2), wash it with deionized water and absolute ethanol three times respectively, and dry it in a vacuum oven at 70°C to obtain the carbon cloth sample grown on carbon cloth. On-cloth, nickel-containing polymolybdate organic-inorganic nanowire precursors;

[0041] 4) with step 3) the product obta...

Embodiment 2

[0046] 1) Take 0.3g of ammonium molybdate tetrahydrate, 0.2g of nickel nitrate hexahydrate and 0.5g of 2-methylimidazole, add them to 40mL of methanol solvent in sequence, and stir to obtain a homogeneous solution;

[0047] 2) Transfer the solution obtained in step 1) to a 50mL reactor, and vertically place a 20.0mm×30.0mm carbon cloth in it, and conduct a solvothermal reaction at 180°C for 24h;

[0048] 3) After cooling down to room temperature, take out the carbon cloth sample from the reaction kettle in step 2), wash it with deionized water and absolute ethanol three times respectively, and dry it in a vacuum oven at 70°C to obtain the carbon cloth sample grown on carbon cloth. On-cloth, nickel-containing polymolybdate organic-inorganic nanowire precursors;

[0049] 4) with step 3) the product obtained in Ar / H 2 Gradient temperature calcination is carried out under the atmosphere, the calcination temperature of the first step is 280°C, the calcination time is 2h, and the h...

Embodiment 3

[0052] 1) Take 0.3g of ammonium molybdate tetrahydrate, 0.2g of nickel nitrate hexahydrate and 0.5g of 2-methylimidazole, add them to 40mL of methanol solvent in sequence, and stir to obtain a homogeneous solution;

[0053] 2) Transfer the solution obtained in step 1) to a 50mL reactor, and vertically place a 20.0mm×30.0mm carbon cloth in it, and conduct a solvothermal reaction at 160°C for 20h;

[0054] 3) After cooling down to room temperature, take out the carbon cloth sample from the reaction kettle in step 2), wash it with deionized water and absolute ethanol three times respectively, and dry it in a vacuum oven at 70°C to obtain the carbon cloth sample grown on carbon cloth. On-cloth, nickel-containing polymolybdate organic-inorganic nanowire precursors;

[0055] 4) with step 3) the product obtained in Ar / H 2 Gradient temperature calcination is carried out under the atmosphere, the calcination temperature of the first step is 280°C, the calcination time is 2h, and the h...

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Abstract

The invention relates to a nitrogen-doped carbon-coated Ni&MoO2 ultrafine nanowire and a preparation method and application thereof. The nitrogen-doped carbon-coated Ni&MoO2 ultrafine nanowire can serve as a high-activity and high-stability hydrogen evolution reaction electrocatalyst and is grown onto carbon cloth in an array mode. Ni nanoparticles and MoO2 nanoparticles are embedded into a nitrogen-doped carbon layer to form the nanowire. The diameter of the nanowire is 10-20 nm. The length of the nanowire is 1-2 microns. The specific surface area of the nanowire material is 87.1 m<2>g<-1>. The outer surface of the nanowire is provided with the nitrogen-doped carbon layer with the protection function. The nitrogen-doped carbon-coated Ni&MoO2 ultrafine nanowire has the beneficial effects that the nanowire has excellent hydrogen evolution reaction catalytic activity and durability as the hydrogen evolution reaction material and is a high-efficiency low-cost potential material applied tothe hydrogen evolution reaction electrocatalyst.

Description

technical field [0001] The invention belongs to the field of energy and catalytic materials, in particular to a nitrogen-doped carbon-coated Ni&MoO 2 The ultrafine nanowire and its preparation method and application, the material can be used as a highly active and highly stable hydrogen evolution reaction electrocatalyst. Background technique [0002] With the rapid consumption of fossil energy and the increasingly prominent environmental problems, hydrogen has been considered as one of the cleanest and most promising energy sources. Commercially, hydrogen is mainly produced through the vaporization of coal, but the emission of carbon dioxide and environmental pollution are unavoidable and neglected. Hydrogen evolution reaction, as a half-reaction of electrolysis of water, is a non-polluting technology capable of producing high-purity hydrogen. Efficient electrocatalysts for hydrogen evolution reaction need to meet the requirements of accelerating the cathodic reaction and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/07B22F1/0547B22F1/16
Inventor 麦立强刘熊温波郭瑞婷
Owner WUHAN UNIV OF TECH
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