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Graphene nanobelt supported palladium monatomic catalyst and preparation method thereof

A graphene nanoribbon and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of slow electron transfer rate, small loading capacity, poor electrode stability, etc., and achieve high The effect of economic value, simple preparation process, good catalytic performance and stability

Inactive Publication Date: 2020-01-10
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 the transition metal chalcogenide is a semiconductor, 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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  • Graphene nanobelt supported palladium monatomic catalyst and preparation method thereof
  • Graphene nanobelt supported palladium monatomic catalyst and preparation method thereof
  • Graphene nanobelt supported palladium monatomic catalyst and preparation method thereof

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Embodiment 1

[0028] A graphene nanobelt supported palladium single-atom catalyst and a preparation method thereof, containing Pd, C, H and O elements.

[0029] Above-mentioned a kind of graphene nanoribbon supported palladium single-atom catalyst and preparation method thereof, specifically comprise the following steps:

[0030] (1) Preparation of graphene nanoribbons

[0031] Add 0.5-100g of potassium permanganate and 10-100ml of concentrated sulfuric acid to 1-10g of multi-walled carbon nanotubes, and oxidize them at a temperature of 40°C to 500°C. After several times of centrifugal cleaning, freeze-drying to obtain graphene nanobelt.

[0032] (2) Preparation of graphene nanoribbons supporting palladium single atoms

[0033] Dissolve 10-100mg of graphene nanoribbons, 1-100mg of ethylenediaminetetraacetic acid and 1-100mg of potassium chloropalladate in deionized water, keep stirring at 10-200°C, then centrifuge the solution and grind it, and Calcium carbonate mix and stir to mix well....

Embodiment 2

[0040] A graphene nanobelt supported palladium single-atom catalyst and a preparation method thereof, containing Pd, C, H and O elements.

[0041] Above-mentioned a kind of graphene nanoribbon supported palladium single-atom catalyst and preparation method thereof, specifically comprise the following steps:

[0042] (1) Preparation of graphene nanoribbons

[0043] Add 1-6g of multi-walled carbon nanotubes to 1-50g of potassium dichromate and 10-50ml of ammonium persulfate, oxidize at a temperature of 40°C to 500°C, and after several times of centrifugal cleaning, freeze-dry to obtain graphite ene nanoribbons.

[0044] (2) Preparation of graphene nanoribbons supporting palladium single atoms

[0045] Dissolve 10-50mg of graphene nanoribbons, 1-120mg of sodium ferric edetate and 1-300mg of palladium dibromide in deionized water, keep stirring at 10-150°C, then centrifuge the solution and grind it, Mix with calcium chloride and stir to mix well. Then it will be annealed at 50...

Embodiment 3

[0047] A graphene nanobelt supported palladium single-atom catalyst and a preparation method thereof, containing Pd, C, H and O elements.

[0048] Above-mentioned a kind of graphene nanoribbon supported palladium single-atom catalyst and preparation method thereof, specifically comprise the following steps:

[0049] (1) Preparation of graphene nanoribbons

[0050] Add 1-10g of multi-walled carbon nanotubes to 0.5-100g of potassium permanganate and 10-50ml of sodium peroxide, and oxidize it at a temperature of 30°C to 400°C. After several times of centrifugal cleaning, freeze-drying to obtain graphite ene nanoribbons.

[0051] (2) Preparation of graphene nanoribbons supporting palladium single atoms

[0052] Dissolve 10-50mg of graphene nanoribbons, 1-300mg of tributyl citrate and 1-40mg of ammonium tetrachloropalladate in deionized water, keep stirring at 10-300°C, then centrifuge the solution and grind it, and Sodium bicarbonate mix and stir to mix well. Then it will be a...

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Abstract

The invention relates to a graphene nanobelt supported palladium monatomic catalyst and a preparation method thereof. The preparation method comprises steps of preparation of graphene nanobelts and preparation of palladium monatomic, and preparation of the graphene nanobelt supported palladium monatomic catalyst. Compared with the prior art, the preparation method has the advantages that the graphene nanoribbons are used as the ribbon-shaped carriers, the palladium monatomic morphology characteristics are uniform and regular, the catalyst has good catalytic performance and stability in the field of hydrogen production, the preparation process is simple, and the catalyst is suitable for industrial 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 palladium single-atom catalyst supported by graphene nanobelts and a preparation method thereof. Background technique [0002] With the continuous development of the current era, hydrogen production by electrolysis of water has become a suitable substitute for power generation due to resource and energy crises due to its high energy density and non-polluting products. The hydrogen production reaction of electrolyzed water occurs on the electrode surface, including two basic half-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 catalytic performance and cycle stability of the electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J37/12B82Y30/00B82Y40/00C25B11/08C25B1/04
CPCB01J23/44B01J37/12B82Y30/00B82Y40/00C25B1/04C25B11/091B01J35/33Y02E60/36
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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