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Non-noble metal catalyst for fuel battery, preparation method of non-noble metal catalyst and fuel battery

A non-precious metal and fuel cell technology, applied in the field of electrochemical energy, can solve the problems of low catalytic activity, poor oxygen reduction reaction activity, poor electron transport characteristics, etc., and achieve high catalytic activity, high efficient oxygen reduction ability, and electronic conductivity Enhanced effect

Inactive Publication Date: 2017-05-31
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thanks to g-C 3 N 4 have poor electron transport properties, making g-C 3 N 4 The catalytic reaction is confined to a narrow three-phase interface region, resulting in pure g-C 3 N 4 exhibit poor oxygen reduction reactivity
Currently on g-C 3 N 4 The improvement method is mainly limited to the optimization of the morphology and structure and the composite with the carbon support with high specific surface area, but due to the g-C 3 N 4 The intrinsic structure has not changed, resulting in its catalytic activity is still not high

Method used

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  • Non-noble metal catalyst for fuel battery, preparation method of non-noble metal catalyst and fuel battery
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  • Non-noble metal catalyst for fuel battery, preparation method of non-noble metal catalyst and fuel battery

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preparation example Construction

[0034] The first embodiment of the present invention provides a method for preparing a non-noble metal catalyst for a fuel cell, comprising the following steps:

[0035] Preparation of oxygen-doped g-C 3 N 4 ;

[0036] Doping g-C with oxygen 3 N 4 Spinning solution is prepared with transition metal salt, and the spinning solution is subjected to electrospinning treatment to obtain a precursor sample; the precursor sample is subjected to high temperature treatment to obtain a non-precious metal catalyst.

[0037] The preparation method of the fuel cell non-noble metal catalyst provided by the embodiment of the present invention first synthesizes oxygen-doped g-C 3 N 4 , using oxygen doping to change the g-C 3 N 4 electronic structure, so that g-C 3 N 4 The electronic conductivity is improved, the band gap is reduced, the top of the valence band is moved up, and the oxygen adsorption capacity is improved, so that the oxygen-doped g-C 3 N 4 It has a more efficient oxyg...

Embodiment 1

[0060] g-C 3 N 4 Catalyst: Accurately weigh 3g of melamine and 3g of cyanuric acid and disperse them in 100mL and 200mL of deionized water respectively. After heating to 80°C, the two are completely dissolved to form a transparent solution; 2 SO 4 Adjust the pH of cyanuric acid to 1, then quickly transfer the melamine solution to the cyanuric acid solution to generate a large amount of precipitate, and filter, wash, and dry the precipitate to obtain a precursor; the precursor is heated under the protection of Ar gas Polymerization, the heating program is as follows: first raise the temperature to 400°C, the heating rate is 10°C / min, keep it for 2 hours, then raise the temperature to 600°C, the heating rate is 10°C / min, keep it for 2 hours, and obtain g-C 3 N 4 catalyst. in, figure 1 For the g-C prepared in Example 1 3 N 4 SEM image of the catalyst. The specific surface area of ​​the catalyst prepared by the above method is 38m 2 g -1 , under the three-electrode syste...

Embodiment 2

[0065] g-C 3 N 4 Catalyst: Accurately weigh 3g of melamine and 3g of cyanuric acid and disperse them in 100mL and 200mL of deionized water respectively. After heating to 80°C, the two are completely dissolved to form a transparent solution; 2 SO 4 Adjust the pH of cyanuric acid to 1, then quickly transfer the melamine solution to the cyanuric acid solution to generate a large amount of precipitate, and filter, wash, and dry the precipitate to obtain a precursor; the precursor is heated under the protection of Ar gas Polymerization, the heating program is as follows: first raise the temperature to 400°C, the heating rate is 10°C / min, keep it for 2 hours, then raise the temperature to 600°C, the heating rate is 10°C / min, keep it for 2 hours, and obtain g-C 3 N 4 catalyst. in, figure 2 For the g-C prepared in Example 2 3 N 4 Catalyst SEM image and EDS image. The specific surface area of ​​the catalyst prepared by the above method is 38m 2 g -1 , under the three-electro...

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Abstract

The invention is suitable for the field of electrochemistry power sources, and provides a non-noble metal catalyst for a fuel battery, a preparation method of the non-noble metal catalyst and a fuel battery. The preparation method of the non-noble metal catalyst for the fuel battery comprises the following steps: preparing oxygen-doped g-C3N4; preparing a spinning solution by using the oxygen-doped g-C3N4 and transition metal salts, and performing electrostatic spinning processing on the spinning solution to obtain a precursor sample; performing high temperature treatment on the precursor sample to obtain the non-noble metal catalyst. The non-noble metal catalyst for the fuel battery has the advantages that oxygen adsorption capacity is strong; the specific surface area, electrical conductivity and catalytic activity are high.

Description

technical field [0001] The invention belongs to the field of electrochemical energy, and in particular relates to a non-precious metal catalyst for a fuel cell, a preparation method thereof and a fuel cell. Background technique [0002] With the depletion of fossil fuels and the increasingly serious environmental pollution, as a sustainable and distributed power generation device in the future, fuel cells are attractive to researchers due to their advantages of high efficiency, low carbon dioxide emissions, modularity and good stability. extensive attention. Currently, platinum and platinum alloys are widely used as fuel cell catalysts due to their high catalytic activity. However, due to the high price of platinum, limited reserves, and low resistance to methanol poisoning, the large-scale commercialization of fuel cells is limited. Therefore, the development of high-efficiency and low-cost catalysts has become a key breakthrough for the industrialization of fuel cells. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9041H01M4/9083Y02E60/50
Inventor 吴其兴梅日国席晶晶王芳罗仲宽
Owner SHENZHEN UNIV
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