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Nitrogen-doped carbon nanotube/Co composite catalyst and preparation method and application thereof

A composite catalyst, nitrogen-doped carbon technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of limited commercial applications, lack of resources, expensive prices, etc., to achieve preparation The method is simple, the source of raw materials is wide, and the effect of low cost

Inactive Publication Date: 2017-05-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to use traditional precious metals and their alloys as dual-effect catalysts and hydrogen evolution catalysts under acidic conditions for integrated renewable fuel cells. Limit its commercial application and other shortcomings, provide a kind of oxygen reduction (ORR) and oxygen evolution (OER) and hydrogen evolution catalyst (HER) NCNT / Co composite material and its preparation method under acidic conditions

Method used

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  • Nitrogen-doped carbon nanotube/Co composite catalyst and preparation method and application thereof
  • Nitrogen-doped carbon nanotube/Co composite catalyst and preparation method and application thereof
  • Nitrogen-doped carbon nanotube/Co composite catalyst and preparation method and application thereof

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Embodiment 1

[0042] A preparation method of nitrogen-doped carbon nanotube / Co composite catalyst, comprising the following steps:

[0043] 1) Weigh 0.5g P123 and dissolve it in 5ml deionized water to prepare an aqueous solution with a concentration of 0.1g / ml;

[0044] 2) Weigh 0.8g of melamine and add it to 8ml of deionized water to prepare an aqueous solution with a concentration of 0.1g / ml;

[0045] 3) Add melamine in step 2) into the aqueous solution obtained in step 1), and stir at room temperature for 0.8 h (stirring speed is 20 rpm) to obtain a mixed solution;

[0046] 4) Weigh 90 mg of cobalt nitrate and dissolve it in 18 ml of deionized water to prepare an aqueous solution with a concentration of 5 mg / ml;

[0047] 5) Add step 4) cobalt nitrate solution into the mixed solution obtained in step 3), stir at room temperature for 3 hours (stirring speed is 20 rpm), and 200W ultrasonic treatment for 2 hours to obtain a mixed solution;

[0048] 6) Stir the mixed solution obtained in st...

Embodiment 2

[0056] A preparation method of nitrogen-doped carbon nanotube / Co composite catalyst, comprising the following steps:

[0057] 1) Weigh 0.25g of P123 and dissolve it in 5ml of deionized water to prepare an aqueous solution with a concentration of 0.05g / ml;

[0058] 2) Weigh 0.4g melamine and add it to 8ml deionized water to prepare an aqueous solution with a concentration of 0.05g / ml;

[0059] 3) Add melamine in step 2) into the aqueous solution obtained in step 1), and stir at room temperature for 0.5 h (stirring speed is 40 rpm) to obtain a mixed solution;

[0060] 4) Weigh 60 mg of cobalt acetate and dissolve it in 20 ml of deionized water to prepare an aqueous solution with a concentration of 3 mg / ml;

[0061] 5) Add the cobalt salt solution in step 4) into the mixed solution obtained in step 3), stir at room temperature for 0.5 h (stirring speed is 40 rpm), and ultrasonically treat for 1 h (ultrasonic power is 500 W) to obtain a mixed solution;

[0062] 6) Stir the mixed...

Embodiment 3

[0068] A preparation method of nitrogen-doped carbon nanotube / Co composite catalyst, comprising the following steps:

[0069] 1) Weigh 1.5g P123 and dissolve it in 5ml deionized water to prepare an aqueous solution with a concentration of 0.3g / ml;

[0070] 2) Weigh 2.4g of melamine and add it to 8ml of deionized water to prepare an aqueous solution with a concentration of 0.3g / ml;

[0071] 3) Add melamine in step 2) into the aqueous solution obtained in step 1), and stir at room temperature for 0.5 h (stirring speed is 30 rpm) to obtain a mixed solution;

[0072] 4) Weigh 240 mg of cobalt sulfate salt and dissolve it in 30 ml of deionized water to prepare an aqueous solution with a concentration of 8 mg / ml;

[0073] 5) Add the cobalt salt solution in step 4) into the mixed solution obtained in step 3), stir at room temperature for 5 hours (stirring speed is 30 rpm), and sonicate for 5 hours (ultrasonic power is 300W) to obtain a mixed solution;

[0074]6) Stir the mixed solu...

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Abstract

The invention belongs to the field of preparation and application of energy source materials and discloses a nitrogen-doped carbon nanotube / Co composite catalyst and a preparation method and application thereof. The preparation method includes: 1), respectively preparing melamine, cobalt salt and P123 into water solutions; 2), adding the melamine solution into the P123 solution, stirring for mixing, adding the cobalt salt solution, stirring for mixing, performing ultrasonic treatment, and heating while stirring until water is evaporated to obtain a precursor material; 3), pre-calcining the precursor material at 200-400 DEG C in an inert gas atmosphere, calcining at 450-600 DEG C and at 750-900 DEG C respectively, using an acid solution for soaking, cleaning, and drying to obtain the composite catalyst. The catalyst is high in oxygen reduction and oxygen evolution catalytic activity and stability and has high hydrogen evolution catalytic activity and stability in an acidic condition. The preparation method is simple, extensive in raw material source, low in cost and suitable for large-scale production. The composite catalyst is used in the field of integrated regenerative fuel cells.

Description

technical field [0001] The invention belongs to the field of preparation and application of energy materials, and specifically relates to a nitrogen-doped carbon nanotube / Co composite catalyst and its preparation. The nitrogen-doped carbon nanotube / Co composite catalyst is used for double catalysis of oxygen reduction and oxygen precipitation and / or the field of hydrogen evolution catalysis under acidic conditions, specifically used in the field of fuel cells, especially catalysts for integrated renewable fuel cells, which have dual catalytic effects of oxygen reduction and oxygen evolution, and also have hydrogen under acidic conditions precipitation catalytic effect. Background technique [0002] A fuel cell is an efficient electrochemical power generation system that directly converts chemical energy into electrical energy. Unitized Regenerative Fuel Cell (URFC) is the most advanced type of renewable fuel cell (RFC), and it is a new type of energy storage system develope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C25B1/04H01M4/90
CPCH01M4/9041H01M4/9083C25B1/04B01J27/24B01J35/393B01J35/33B01J35/40Y02E60/36Y02E60/50
Inventor 牛晓君谢贵婷
Owner SOUTH CHINA UNIV OF TECH
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