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Pt@MnO2/C catalyst as well as preparation method and application thereof

A technology of catalysts and compounds, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as high cost

Inactive Publication Date: 2020-10-30
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the catalysts used in fuel cells include Pt / C, Pt@Ru / C, etc. The biggest commonality of these catalysts is their high cost. How to effectively prepare low-cost catalysts has become a hot research topic.

Method used

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  • Pt@MnO2/C catalyst as well as preparation method and application thereof
  • Pt@MnO2/C catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A Pt@MnO 2 The preparation method of / C catalyst comprises the steps:

[0042] S1. Mix potassium hydroxide and conductive carbon black XC-72, calcinate at 800°C for 12 hours in an argon atmosphere, then wash, filter, and dry to obtain material 1;

[0043] S2. Mechanically stir 100mg of material 1 and 100mL of water in a round bottom flask for 4h, then add 300mgKMnO 4 Continue to stir the powder for several hours to mix well, add a magnetic stirrer to the round bottom flask and place it in a microwave reactor, adjust the stirring speed to 100r / s, and the microwave power to 600W to react for 60s, wash after cooling, filter to take the filter cake, bake Dry to get MnO 2 / C material;

[0044] S3, add 50mL ethylene glycol and 2g hexadecyltrimethylammonium bromide to the round bottom flask and mix well, add 94mg potassium chloroplatinate and stir well, adjust with the ethylene glycol solution of NaOH with a concentration of 1mol / L pH = 12, then in argon atmosphere, reflux ...

Embodiment 2

[0049] A Pt@MnO 2 The preparation method of / C catalyst comprises the steps:

[0050] S1. Mix potassium hydroxide and conductive carbon black XC-72, calcinate at 900°C for 8 hours in an argon atmosphere, then wash, filter, and dry to obtain material 1;

[0051] S2. Mechanically stir 100mg of material 1 and 100mL of water in a round bottom flask for 4h, then add 5mg of KMnO 4Continue to stir the powder for several hours to mix well, add a magnetic stirrer to the round bottom flask and place it in a microwave reactor, adjust the stirring speed to 100r / s, and the microwave power to 1000W to react for 20s, wash after cooling, filter to take the filter cake, bake Dry to get MnO 2 / C material;

[0052] S3, add 50mL ethylene glycol and 2g cetyltrimethylammonium bromide to the round bottom flask and mix well, add 99mg chloroplatinic acid and stir well, adjust the pH with the ethylene glycol solution of NaOH with a concentration of 2mol / L =10, then in argon atmosphere, reflux at 100...

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Abstract

The invention discloses a preparation method of a Pt@MnO2 / C catalyst. The method comprises: S1, uniformly mixing a strong alkali and a carbon material, calcining in an inert gas atmosphere, washing, and drying to obtain a material 1; S2, uniformly mixing the material 1 with water, uniformly mixing with KMnO4, reacting in microwaves, cooling, washing, filtering, taking a filter cake, and drying toobtain a MnO2 / C material; and S3, uniformly mixing the ethylene glycol solution of hexadecyl trimethyl ammonium bromide with a Pt-containing compound, adjusting the pH value to be 10-14, refluxing inan inert gas atmosphere, adding a MnO2 / C material, continuously refluxing, naturally cooling, continuously stirring, and finally, filtering, washing the filter cake, drying and calcining to obtain thePt@MnO2 / C catalyst. The invention also discloses a Pt@MnO2 / C catalyst and an application thereof. The catalyst provided by the invention has good dispersibility and catalytic performance, and is lowin cost.

Description

technical field [0001] The invention relates to the technical field of fuel cell materials, in particular to a Pt@MnO 2 / C catalyst and its preparation method and application. Background technique [0002] A fuel cell is a renewable and clean energy that continuously converts chemical energy into electrical energy. Since its appearance in the early 1960s, it has rapidly developed into one of the hot spots in the international high-tech competition. Fuel cell is an important research direction in energy, transportation, electronics and other fields and a high-tech technology that needs to be developed urgently. [0003] At present, the catalysts used in fuel cells include Pt / C, Pt@Ru / C, etc. The biggest commonality of these catalysts is their high cost. How to effectively prepare low-cost catalysts has become a hot research topic. Contents of the invention [0004] Based on the technical problems existing in the background technology, the present invention proposes a Pt@...

Claims

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Application Information

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IPC IPC(8): H01M4/92
CPCH01M4/926H01M4/921Y02E60/50
Inventor 李坤张小健郑刚鲁鹏陈佩林
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY