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A carbon-oxide composite carrier nanomaterial, its synthesis method and application

A composite carrier and nanomaterial technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as unfavorable load application and poor dispersion

Active Publication Date: 2022-07-15
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are also some disadvantages in the above synthesis process, such as poor dispersion of oxide particles after formation, which is not conducive to loading applications

Method used

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  • A carbon-oxide composite carrier nanomaterial, its synthesis method and application
  • A carbon-oxide composite carrier nanomaterial, its synthesis method and application
  • A carbon-oxide composite carrier nanomaterial, its synthesis method and application

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preparation example Construction

[0028] The invention provides a method for synthesizing carbon-oxide composite carrier nanomaterials, comprising the following steps:

[0029] S1, take cyclodextrin or its derivative as the main carbon source, mix and include with soluble metal salt and organic pore-forming agent to obtain a mixture;

[0030] S2. The mixture is pyrolyzed at high temperature to obtain a carbon-oxide composite carrier nanomaterial.

[0031] The carbon-oxide composite nanomaterial synthesized by the invention contains oxide particles that are uniformly dispersed, can be loaded with active components such as metal platinum, and has high activity and stability for methanol electrooxidation. In addition, the synthesis method provided in the present application has a simple operation process and can realize large-scale preparation.

[0032] In the embodiment of the present invention, the cyclodextrin or its derivative, the soluble metal salt, the organic pore-forming agent and the solvent are unifor...

Embodiment 1

[0045] a. 486mgα-CD (0.5mmol), 486mg F127, 78mg Ce (NO 3 ) 4 ·6H 2 O (0.18mmol), dispersed in 20ml of ethanol and 20ml of ultrapure water mixed solvent, and stirred evenly;

[0046] b. Place the flask containing the above homogeneous solution in an oil bath, control the temperature to 70°C, stir at a constant temperature for 4h, and rotate the speed to 1500r / min.

[0047] c. Pour the solution after the oil bath into an evaporating dish, and place it in a clean place in the laboratory without falling into dust, and let it volatilize naturally at room temperature until it dries to obtain a white mixture;

[0048] d. Scrape off the white mixture in the evaporating dish, put it into a quartz boat, put it into the tube furnace carefully, then purge it with nitrogen for 30 minutes, drain the air inside, and heat up at a rate of 5°C / min to 800 °C, kept for 2 h, and then naturally cooled to room temperature to obtain C-CeO 2 The composite carrier can be used after taking it out an...

Embodiment 2

[0059] a. 567mg β-CD (0.5mmol), 567mg F127, 78mg Ce (NO 3 ) 4 ·6H 2 O (0.18mmol), dispersed in 20ml of ethanol and 20ml of ultrapure water mixed solvent, and stirred evenly;

[0060] b. Place the flask containing the above homogeneous solution in an oil bath, control the temperature to 70°C, stir at a constant temperature for 4h, and rotate the speed to 1500r / min.

[0061] c. Pour the solution after the oil bath into an evaporating dish, and place it in a clean place in the laboratory without falling into dust, and let it volatilize naturally at room temperature until it dries to obtain a white mixture;

[0062] d. Scrape off the white mixture in the evaporating dish, put it into a quartz boat, put it into the tube furnace carefully, then purge it with nitrogen for 30 minutes, drain the air inside, and heat up at a rate of 5°C / min to 800 °C, kept for 2 h, and then naturally cooled to room temperature to obtain C-CeO 2 The composite carrier can be used after taking it out a...

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Abstract

The invention provides a carbon-oxide composite carrier nanomaterial, a synthesis method and application thereof, and the method comprises the following steps: S1, using cyclodextrin or its derivative as the main carbon source, and soluble metal salt, organic pore-forming The mixture is mixed and clasped to obtain a mixture; S2, the mixture is pyrolyzed at a high temperature to obtain a carbon-oxide composite carrier nanomaterial. In the carbon-oxide composite carrier nanomaterial prepared in the present application, the oxide particles have good dispersibility and small particles. On this basis, the carbon-oxide composite carrier nanomaterial prepared in the present application has good electrocatalytic activity after liquid-phase reduction and loading of Pt, so that it can be used as a negative electrode material for methanol fuel cells. Electrochemical C-V, ECSA, I-T curve tests show that the catalyst has good activity and stability. In addition, the raw materials for preparing the carbon-oxide composite nanomaterials in the present application are common and easy to obtain, and the reaction conditions are relatively mild, and the applicability is relatively wide.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a carbon-oxide composite carrier nanomaterial, a synthesis method and application thereof. Background technique [0002] Due to its excellent chemical stability, thermal stability and good electrical conductivity, carbon-oxide composite support materials are widely used in many scientific and technological fields, including water purification, catalysis, separation, gas sensing, collection, production, etc. Hydrogen, energy storage (fuel cells, supercapacitors), etc. Generally, the synthesis of carbon-oxide composite support materials is the direct carbonization of organic precursors. Studies have shown that the chemical properties of organic precursors and metal salt precursors affect the structure, properties and properties of the final carbon materials. Carbon-oxide materials have characteristic structural properties, for example, ranging from amorphous car...

Claims

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Application Information

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IPC IPC(8): H01M4/92B82Y30/00
CPCH01M4/921H01M4/925H01M4/926B82Y30/00Y02E60/50
Inventor 梁海伟沈善成
Owner UNIV OF SCI & TECH OF CHINA