A kind of crystalline ruthenium diselenide based catalyst and its preparation method and application

A ruthenium-based catalyst and crystallinity technology, which is applied in the field of crystalline ruthenium diselenide-based catalyst and its preparation, can solve the problems of complex preparation process and insufficient catalyst stability, and achieve simple method, good industrial application prospect and operating conditions mild effect

Active Publication Date: 2022-05-24
南京中科格特康科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the above-mentioned ruthenium-based catalysts have defects such as complicated preparation process and insufficient stability of the obtained catalysts. Therefore, the preparation of ruthenium-based catalysts with better catalytic activity and stability is the key to further promote the hydrogen production process of electrolyzed water.

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  • A kind of crystalline ruthenium diselenide based catalyst and its preparation method and application
  • A kind of crystalline ruthenium diselenide based catalyst and its preparation method and application
  • A kind of crystalline ruthenium diselenide based catalyst and its preparation method and application

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Embodiment 1

[0078] This embodiment provides a preparation method of a crystalline ruthenium diselenide-based catalyst, and the preparation method includes the following steps:

[0079] (1) mixed concentration is the ruthenium trichloride aqueous solution, selenium dioxide, carbon nanotube and ethylene glycol of 20mg / mL, obtains mixed solution; The atomic ratio of ruthenium and selenium in the selenium dioxide in the ruthenium trichloride aqueous solution is 1:2, the mass ratio of selenium dioxide and carbon nanotubes is 2:5, that is, 50 mg of carbon nanotubes are added, and the volume ratio of ruthenium trichloride aqueous solution and ethylene glycol is 1:50; After dispersing with power ultrasonic for 30min, stir with 500rpm magnetic force for 30min and adjust the pH of the mixed solution to 7 with 1M sodium hydroxide solution;

[0080] (2) The mixed solution in step (1) is cooled to 25° C. after 700W microwave treatment for 3min, suction filtered, washed with ethanol for 3 times, washed...

Embodiment 2

[0084] This embodiment provides a preparation method of a crystalline ruthenium diselenide-based catalyst, and the preparation method is the same as that in embodiment 1 except that the temperature in step (3) is replaced with 550°C.

[0085] The atomic percentage of each element in the crystalline ruthenium diselenide-based catalyst prepared in this example is C: 68.28%, O: 10.32%, Ru: 6.38%, Se: 17.66%, and the content of metallic ruthenium in the ruthenium element is 61.97%, and the crystalline ruthenium diselenide particles are uniformly dispersed on the carbon nanotubes.

Embodiment 3

[0087] This embodiment provides a preparation method of a crystalline ruthenium diselenide-based catalyst, and the preparation method is the same as that of embodiment 1 except that the temperature in step (3) is replaced by 750°C.

[0088] The atomic percentages of each element in the crystalline ruthenium diselenide-based catalyst prepared in this example are C: 68.28%, O: 10.86%, Ru: 6.38%, Se: 14.49%, and the content of metallic ruthenium in the ruthenium element is 62.89%, and the crystalline ruthenium diselenide particles are uniformly dispersed on the carbon nanotubes.

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Abstract

The invention discloses a crystalline ruthenium diselenide-based catalyst and its preparation method and application. The crystalline ruthenium diselenide is transformed from an amorphous structure. The crystalline ruthenium diselenide-based catalyst includes carbon Carrier and crystalline ruthenium diselenide particles loaded on the carbon carrier; the structure of the crystalline ruthenium diselenide particles includes a cubic crystal structure; the preparation method contains ruthenium trichloride aqueous solution, dioxide The ethylene glycol solution of selenium and carbon carrier uniformly loads selenium atoms and ruthenium atoms on the surface of the carbon carrier, and then obtains good crystalline ruthenium diselenide particles through heat treatment, which effectively improves the crystalline ruthenium diselenide-based catalyst. Catalytic activity and stability; when the crystalline ruthenium diselenide-based catalyst is used for electrolysis of water to produce hydrogen, in acidic and alkaline electrolytes, the current density is 10mA / cm 2 , under optimal conditions, the hydrogen evolution overpotentials of the catalysts can reach below 68mV and below 48mV respectively.

Description

technical field [0001] The invention belongs to the field of fuel cells, in particular to a fuel cell catalyst, in particular to a crystalline ruthenium diselenide-based catalyst and a preparation method and application thereof. Background technique [0002] Fossil energy such as coal and petroleum is non-renewable and prone to serious environmental pollution. Therefore, the development of renewable and clean energy such as hydrogen energy has become an effective solution to the energy crisis. Due to the advantages of environmental friendliness and zero CO2 emissions, electrolysis of water to generate hydrogen and oxygen as fuels has received extensive attention. [0003] The precious metal platinum is the most effective catalyst for the water electrolysis reaction, but cannot be widely used due to its high price. The precious metal ruthenium is relatively cheap compared to platinum, and its hydrogen evolution reaction performance is far superior to other transition metals....

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C25B11/091C25B1/04
CPCC25B1/04Y02E60/36
Inventor胡超权冯立纲李琳杨旭
Owner南京中科格特康科技有限公司