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A kind of ruthenium nano metal electrocatalyst and preparation method

An electrocatalyst and nano-metal technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve good application prospects, wide range of raw material sources, and good stability Effect

Inactive Publication Date: 2021-02-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the existing problems of HER catalysts, the present invention provides a ruthenium nano metal particle electrocatalyst and its preparation method

Method used

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  • A kind of ruthenium nano metal electrocatalyst and preparation method
  • A kind of ruthenium nano metal electrocatalyst and preparation method
  • A kind of ruthenium nano metal electrocatalyst and preparation method

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preparation example Construction

[0041] The invention provides a kind of preparation method of ruthenium nano metal electrocatalyst, comprises the following steps:

[0042] S1. Preparation of ruthenium phthalocyanine metal organic compounds;

[0043] S2. Dispersing and mixing the ruthenium phthalocyanine metal organic compound with a two-dimensional carbon material to obtain an electrocatalyst precursor;

[0044] S3. Pyrolyzing the electrocatalyst precursor at high temperature under an inert atmosphere to obtain a ruthenium nano metal particle electrocatalyst.

[0045] It can be understood that, in the present invention, what the precursor of preparation electrocatalyst adopts is ruthenium phthalocyanine metal organic compound, and its metal ruthenium (Ru) is chemically bonded Ru-N 4 Fixed at the center of the phthalocyanine heterocycle, while introducing a two-dimensional carbon material to separate the ruthenium phthalocyanine in space, followed by high-temperature pyrolysis under an inert gas, the migrati...

Embodiment 1

[0048] refer to figure 1 Shown is a schematic diagram of the synthetic route of the ruthenium phthalocyanine metal organic compound in this example.

[0049] Specifically, 7.54g of tetranitrophthalonitrile and 2.25g of ruthenium trichloride (RuCl 3 ) into a three-necked flask, mechanically stirred and mixed evenly, then heated in an oil bath to 160°C to make the reactant in a molten state, maintained at 160°C for 4 hours, and then naturally cooled to room temperature, after grinding, repeated extraction with methanol and acetone to obtain 4 -Nitroruthenium phthalocyanine (RuPc-NO 2 )powder. Pour 4.0g of 4-nitroruthenium phthalocyanine and 18g of sodium sulfide nonahydrate into a three-necked flask, add 150mL of N,N dimethylformamide and react in a water bath at 60°C for 8 hours, and obtain 4-aminoruthenium phthalocyanine through filtration and extraction (RuPc-NH 2 ); the synthesized 4-aminoruthenium phthalocyanine (0.1g) was dispersed in 20mL water, and 2.5mL of graphene ...

Embodiment 2

[0052] With the synthetic 4-aminoruthenium phthalocyanine (RuPc-NH 2 ) were directly transferred as a precursor to a tube furnace for pyrolysis. Pyrolysis conditions: under argon atmosphere, the temperature rise range is 30-800°C, the speed is 5°C / min, and the temperature is maintained at 800°C for 2 hours. After natural cooling, the electrocatalyst Ru@NC was obtained after washing with ethanol. In the catalyst, ruthenium atoms in ruthenium phthalocyanine undergo high-temperature thermal reduction to form ruthenium nanoparticles, and nitrogen and carbon elements are converted into nitrogen-doped carbon materials. After statistical analysis of the TEM photos, the particle size distribution of the ruthenium nanoparticles is 1.44±0.36nm. Thermogravimetric analysis showed that the Ru content was 26.5 wt%. The nitrogen adsorption and desorption test shows that the catalyst has a 55.7m 2 g -1 , the pore volume is 0.18cm 3 g -1 , the average pore diameter is 2.73nm.

[0053] ...

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Abstract

The invention discloses a ruthenium nano-metal electrocatalyst and a preparation method thereof. The preparation method of the ruthenium nano-metal electrocatalyst comprises the following steps: preparing a ruthenium phthalocyanine metal organic compound; combining the ruthenium phthalocyanine metal organic compound with two Dimensional carbon materials are dispersed and mixed to obtain an electrocatalyst precursor; the electrocatalyst precursor is pyrolyzed under an inert atmosphere to obtain a ruthenium nanometer metal particle electrocatalyst. The method for preparing the electrocatalyst of the present invention is simple, and the source of raw materials is extensive, especially the price of ruthenium is only about 5% of that of platinum, which can greatly reduce the cost of the catalyst; the electrocatalyst of the present invention has high HER activity in acid-base solution and is stable Good performance, especially better than commercial Pt / C catalysts in alkaline environment, has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of nanomaterial electrocatalysis, in particular to a ruthenium nanometer metal electrocatalyst and a preparation method thereof. [0002] technical background [0003] With the rapid development of social economy, the rapid consumption of fossil energy and the increasingly serious environmental pollution have become the main problems facing the world, especially the smog problem in China has become the focus of public attention. Therefore, it is urgent to find an alternative clean energy source. Hydrogen energy is an environmentally friendly clean energy. Due to its advantages of high energy density and zero pollution emissions, it is considered to be the most promising sustainable clean energy to replace petrochemical energy in the future. At present, the content of hydrogen in nature is very small, and hydrogen can only be produced on a large scale through various methods. Among them, electrolysis of water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/46B01J27/24B01J35/02
CPCB01J23/462B01J27/24B01J35/0033B01J35/023
Inventor 牛晓滨杨建郭恒陈海元汪博筠罗思源
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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