Nanometer metal/carbon composite material as well as preparation method and application thereof

A carbon composite material, nano-metal technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, fuel cell-type half-cells and secondary battery-type half cells, etc. Limited performance, large metal particles, etc., to achieve the effect of low cost, preventing shedding and agglomeration, and suitable for large-scale industrial production

Inactive Publication Date: 2018-10-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of large metal particles and limited catalytic performance in the current preparation of carbon-supported metal catalysts, the present invention proposes a nano-metal / carbon composite material and its preparation method and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Weigh 2g of CoCl in proportion 2 ·6H 2 O and 2g of Zn(Ac) 2 ·2H 2 Add O and 50 ml of ethylene glycol solution, stir for 1 h to fully dissolve the two, and then add 1.5 g of glucose as a carbon source to the mixed solution to obtain a transparent mixed solution.

[0047] (2) Pour the obtained transparent mixed solution into a hydrothermal kettle, place it in a high-temperature oven and adjust the heating rate to 10°C / min. After 3 hours of water heating at a temperature of 150°C, use water cooling to rapidly reduce it to room temperature.

[0048] (3) The obtained hydrothermal product is filtered and separated to obtain brown solid powder, then the solid powder is put into 100ml of ethanol and ultrasonicated for 10min, washed repeatedly and suction filtered three times, and then the solid powder is put into an oven for drying for 8h. use.

[0049] (4) Finally, put the obtained solid powder into a high-temperature resistance furnace protected by Ar, keep the heati...

Embodiment 2

[0053] (1) Weigh 2g of NiSO in proportion 4 ·7H 2 O and 4g of Al(NO) 3 ·9H 2 Add O and ethylene glycol into 70ml of ethylene glycol solution, stir for 1h to fully dissolve the two, then add 3g of glucose as a carbon source to the mixed solution to obtain a transparent mixed solution.

[0054] (2) Pour the obtained transparent mixed solution into a hydrothermal kettle, place it in a high-temperature oven and adjust the heating rate to 10°C / min. After 5 hours of water heating at a temperature of 160°C, use water cooling to rapidly reduce it to room temperature.

[0055] (3) The obtained hydrothermal product is filtered and separated to obtain a brown solid powder, then the solid powder is put into 100ml of ethanol and ultrasonicated for 20min, repeatedly washed and suction filtered for three times, and then the solid powder is put into an oven for drying for 8h. use.

[0056] (4) finally put the obtained solid powder into N 2 In the protected high temperature resistance fu...

Embodiment 3

[0060] (1) Weigh 2g of FeCl in proportion 3 ·6H 2 O and 5g of GaCl 3 and added to 70ml of ethylene glycol solution, stirred for 1h to fully dissolve the two, and then added 5g of glucose as a carbon source to the mixed solution to obtain a transparent mixed solution.

[0061] (2) Pour the obtained transparent mixed solution into a hydrothermal kettle, place it in a high-temperature oven and adjust the heating rate to 10°C / min. After 5 hours of water heating at a temperature of 180°C, use water cooling to rapidly reduce it to room temperature.

[0062] (3) The obtained hydrothermal product is filtered and separated to obtain brown solid powder, then the solid powder is put into 200ml of ethanol and ultrasonicated for 20min, repeatedly washed and suction filtered for three times, then the solid powder is put into an oven for drying for 10h use.

[0063] (4) Finally, put the obtained solid powder into a high temperature resistance furnace protected by He, keep the heating rat...

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Abstract

The invention discloses a nanometer metal / carbon composite material as well as a preparation method and application thereof. According to the nanometer composite material, amorphous carbon spheres serve as a skeleton, metal elements are embedded in a carbon layer uniformly, and spherical granules with the granularity of 100 to 500 nm are formed. The amorphous carbon sphere has a loose and porous structure, the specific surface area is between 300 m<2> / g and 1000 m<2> / g, and the grain diameter of the quantum metal elements is between 3 nm and 10 nm. The porous structures in the amorphous carbonspheres provide a large amount of active sites and are favorable for performing oxygen adsorption and precipitation kinetics reaction; meanwhile, the metal elements embedded in the carbon layer can improve the catalytic activity of carbon material oxygen precipitation. The nanometer composite material shows high catalytic activity when serving as a catalyst, has the characteristics of low cost and excellent catalytic property relative to the existing method for preparing the catalyst, and is suitable for large-scale marketization application.

Description

technical field [0001] The invention relates to the field of catalytic material preparation, in particular to a nanometer metal / carbon composite material and a preparation method and application thereof. technical background [0002] With the increasing demand for energy in society and the improvement of people's awareness of environmental protection, the development of new renewable energy to replace fossil energy has become the focus of development in various countries. Metal-air batteries represented by zinc, aluminum, magnesium, and iron can directly convert chemical energy into electrical energy. They have high energy density, abundant resources, and low prices. They have been widely studied and are expected to become a new generation of energy storage devices. Metal-air battery The positive electrode of the air battery is oxygen, and the negative electrode is a metal element. Catalytic oxygen reduction (ORR) occurs at the cathode during discharge, and oxygen evolution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/78B01J23/80B01J35/00B01J35/10H01M4/90H01M12/08
CPCB01J23/755B01J23/78B01J23/80B01J35/0033B01J35/1019B01J35/1023H01M4/9041H01M4/9083H01M12/08Y02E60/10
Inventor 田忠良赖延清赵泽军辛鑫郭伟昌宗传鑫李劼
Owner CENT SOUTH UNIV
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