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Boron-doped graphene nanobelt loaded nickel monatomic catalyst and preparation method thereof

A graphene nanoribbon and boron-doped technology, which is applied in the field of hydrogen production, can solve the problems of poor electrode stability, slow electron transfer rate, and small loading capacity, and achieve simple preparation process, high economic value, good catalytic performance and stable sexual effect

Inactive Publication Date: 2020-03-06
塞文科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there are still many problems in the field of electrocatalytic hydrogen separation of non-noble metal-based single-atom catalysts. One is that the loading of single-atom-based catalysts is usually too small due to the need to control the generation of no metal bonds in the entire system. The second is that transition metal chalcogenides are semiconductors, and the electron transfer rate is slow, so it is very important for the electrocatalyst to use a substrate with good conductivity to support the catalyst; the third is the cycle stability of the prepared electrode , the stability of the currently prepared electrocatalyst-loaded electrodes is often poor

Method used

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  • Boron-doped graphene nanobelt loaded nickel monatomic catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] A boron-doped graphene nanoribbon-supported nickel single-atom catalyst and a preparation method thereof, containing Ni, C, H, B and O elements.

[0035] The above-mentioned a kind of boron-doped graphene nanoribbon-supported nickel single-atom catalyst and its preparation method specifically comprise the following steps:

[0036] (1) Preparation of graphene nanoribbons

[0037] Add 0.5-100g of potassium permanganate and 10-100ml of concentrated sulfuric acid to 1-5g of multi-walled carbon nanotubes, and oxidize them at a temperature of 50°C to 700°C. After several times of centrifugal cleaning, freeze-drying to obtain graphene nanobelt.

[0038] Preparation of boron-doped graphene nanoribbons

[0039] 10-100g of graphene nanobelts are ultrasonically treated, then 1-1000g of boric acid is added, and then reacted in a hydrothermal kettle at 30°C to 600°C for 10 minutes to 2 hours to perform boron doping to obtain boron-doped graphene nanobelts ;

[0040] (3) Preparat...

Embodiment 2

[0045] A boron-doped graphene nanoribbon-supported nickel single-atom catalyst and a preparation method thereof, containing Ni, C, H B and O elements.

[0046] The above-mentioned a kind of boron-doped graphene nanoribbon-supported nickel single-atom catalyst and its preparation method specifically comprise the following steps:

[0047] (1) Preparation of graphene nanoribbons

[0048] Add 1-6g of multi-walled carbon nanotubes to 1-50g of potassium permanganate and 10-50ml of concentrated sulfuric acid, and oxidize them at a temperature of 40°C to 500°C. After several times of centrifugal cleaning, freeze-drying to obtain graphene nanobelt.

[0049]Preparation of boron-doped graphene nanoribbons

[0050] Ultrasonic treatment of 10-100g of graphene nanoribbons, and then adding 1-1000g of potassium borate, and then reacting in a hydrothermal kettle at 30°C to 600°C for 10 minutes to 2 hours to perform boron doping to obtain boron-doped graphene nanoribbons bring;

[0051] (3)...

Embodiment 3

[0054] A boron-doped graphene nanoribbon-supported nickel single-atom catalyst and a preparation method thereof, containing Ni, C, H B and O elements.

[0055] The above-mentioned a kind of boron-doped graphene nanoribbon-supported nickel single-atom catalyst and its preparation method specifically comprise the following steps:

[0056] (1) Preparation of graphene nanoribbons

[0057] Add 0.5-100g of potassium permanganate and 10-50ml of concentrated sulfuric acid to 1-10g of multi-walled carbon nanotubes, and oxidize them at a temperature of 30°C to 400°C. After several times of centrifugal cleaning, freeze-drying to obtain graphene nanobelt.

[0058] Preparation of boron-doped graphene nanoribbons

[0059] Ultrasonic treatment of 10-100g of graphene nanoribbons, then adding 1-1000g of sodium borate, and then reacting in a hydrothermal kettle at 30°C to 600°C for 10 minutes to 4 hours for boron doping to obtain boron-doped graphene nanoribbons bring;

[0060] (3) Preparat...

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Abstract

The invention relates to a boron-doped graphene nanobelt loaded nickel monoatomic catalyst and a preparation method thereof. The boron-doped graphene nanobelt loaded nickel monoatomic catalyst is prepared by comprising the following steps: preparation of a graphene nanobelt, preparation of a boron-doped graphene nanobelt and preparation of the boron-doped graphene nanobelt loaded nickel monoatomiccatalyst. Compared with the prior art, the boron-doped graphene nanobelt loaded nickel monoatomic catalyst provided by the invention uses the boron-doped graphene nanobelt as a belt-shaped carrier, has uniform and regular nickel monatomic morphology characteristics, has good catalytic performance and stability in the field of hydrogen production, is simple in preparation process, is applicable toindustrial production and has high economic value.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production, and in particular relates to a boron-doped graphene nanobelt-supported nickel single-atom catalyst and a preparation method thereof. Background technique [0002] Hydrogen production by electrolysis of water is a convenient, efficient and promising hydrogen production method. The hydrogen production reaction of electrolyzed water occurs on the surface of the electrode, including two basic reactions: the cathodic hydrogen evolution reaction and the anode oxygen evolution reaction. For the electrolytic water hydrogen production reaction, how to effectively improve the catalytic activity of the catalytic material, reduce the open overpotential and Tafel slope of the hydrogen evolution reaction, and improve the long-term stability and cycle stability of the electrode material is a hot spot in the field of electrocatalysis. and focus. Generally speaking, noble metal platinum-based cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C25B1/04C25B11/06
CPCB01J23/755C25B1/04C25B11/095B01J35/33Y02E60/36
Inventor 高秀姣其他发明人请求不公开姓名
Owner 塞文科技(上海)有限公司
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