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Preparation method of indole-modified macroporous carbon supported transition metal catalysts

A transition metal, macroporous carbon technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of less research and poor catalyst performance, and achieve good conductivity, uniform distribution, The effect of shortening the composition time

Inactive Publication Date: 2014-08-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, research on low-cost catalysts mainly focuses on transition metal atom cluster catalysts, macrocyclic compound catalysts containing transition metals in the center, and metal carbide catalysts; in addition, nitrides, sulfides, borides, and silicides are used as low-temperature fuels. Battery catalysts have also been reported, but the performance of these catalysts is relatively poor, and there are relatively few studies

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  • Preparation method of indole-modified macroporous carbon supported transition metal catalysts

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Example 1: Preparation of macroporous carbon

[0021] Weigh the hydrophilic nano-CaCO according to the mass ratio of 1:1 3 (15-40 nm) and 10 g of glucose each, add 100 mL of deionized water, and mix with ultrasonic vibration for 30 minutes to dissolve the carbon source material and mix with nano-CaCO 3 Disperse evenly, heat to evaporate water, and then cure at 160°C for 6 hours. The cured product was heated to 800 °C under the protection of nitrogen atmosphere, and carbonized at constant temperature for 2 hours. The carbonized product was successively washed with 5 wt% hydrochloric acid, 80 o C was washed with sodium hydroxide solution (concentration: 30 wt%) and deionized water, and dried at a constant temperature at 120 °C for 4 hours to obtain macroporous carbon materials.

[0022] When glucose is replaced by sucrose, starch, cyclodextrin, polyvinyl alcohol, polyethylene glycol, polyacrylic acid, and water-soluble cellulose in sequence, the pore size and porosity...

Embodiment 2

[0023] Example 2: Preparation of indole-modified macroporous carbon-supported noble metal catalyst

[0024] Weigh the hydrophilic nano-CaCO according to the mass ratio of 1:1 3 (15-40 nm) and 10 g of sucrose each, add 100 mL of deionized water, and mix with ultrasonic vibration for 30 minutes to dissolve the carbon source material and mix with nano-CaCO 3 Disperse evenly, heat to evaporate water, and then cure at 160°C for 6 hours. The cured product was heated to 800 °C under the protection of nitrogen atmosphere, and carbonized at constant temperature for 2 hours. The carbonized product was successively washed with 5 wt% hydrochloric acid, 80 o C was washed with sodium hydroxide solution (concentration: 30 wt%) and deionized water, and dried at a constant temperature at 120 °C for 4 hours to obtain macroporous carbon materials.

[0025] The macroporous carbon material was crushed to a particle size of 100-400 mesh, 2 g of macroporous carbon was placed in a hydrothermal re...

Embodiment 3

[0026] Example 3: Preparation of indole-modified macroporous carbon-supported non-noble metal catalyst

[0027] Weigh the hydrophilic nano-CaCO according to the mass ratio of 1:1 3 (15-40 nm) and 10 g of starch each, add 100 mL of deionized water, and mix with ultrasonic vibration for 30 minutes to dissolve the carbon source material and mix with nano-CaCO 3 Disperse evenly, heat to evaporate water, and then cure at 160°C for 6 hours. The cured product was heated to 800 °C under the protection of nitrogen atmosphere, and carbonized at constant temperature for 2 hours. The carbonized product was successively washed with 5 wt% hydrochloric acid, 80 o C was washed with sodium hydroxide solution (concentration: 30 wt%) and deionized water, and dried at a constant temperature at 120 °C for 4 hours to obtain macroporous carbon materials.

[0028] The macroporous carbon material was crushed to a particle size of 100-400 mesh, and 2 g of macroporous carbon was placed in a hydrothe...

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Abstract

The invention relates to an oxygen electrochemical reduction catalyst, and aims to provide a preparation method of indole-modified macroporous carbon supported transition metal catalysts. The method comprises the following steps of: adding hydrophilic nano CaCO3 and a carbon source material into deionized water, and carrying out ultrasonic vibration mixing on the obtained mixture; heating the mixture to evaporate water, and then solidifying for 6 hours at a temperature of 160 DEG C; carrying out constant-temperature carbonization on the solidified product under nitrogen; washing a carbonized product sequentially by using a hydrochloric acid, a sodium hydroxide solution and deionized water, and carrying out constant-temperature drying on the obtained product so as to obtain a macroporous carbon material; and after the macroporous carbon material is crushed, adding indole as a modified material, adding an aqueous solution of transition metal nitrates, sulfates or chlorides into the obtained object, after the obtained product is reacted, filtering, cleaning and drying the obtained product so as to obtain an indole-modified macroporous carbon supported transition metal catalyst. The method disclosed by the invention is simple in synthesis process and easy to operate, and a necessary high-temperature calcination process required by the preparation of general catalysts is not required. The synthesis time of catalysts can be greatly shortened. Catalyst are good in electrical conductivity, and an indole modified layer increases the activity and stability of catalysts, and therefore, the catalysts are especially applicable to large-current working conditions.

Description

technical field [0001] The invention relates to an oxygen electrochemical reduction catalyst and a preparation method thereof, in particular to the indole modified macroporous carbon loaded transition metal catalyst prepared by a hydrothermal method using indole as a modified material and macroporous carbon as a carrier method. Background technique [0002] Fuel cell is a new power generation technology with high efficiency, low pollution and diversified energy sources. The fuel cell power generation system is not only lower in cost than traditional fossil fuels, but also has the advantages of cleanliness and high efficiency. It can also be combined with nuclear energy, biomass energy, solar energy, wind energy and other power generation technologies to make energy use diversified, renewable and sustainable. . Fuel cells use fuels such as alcohol, natural gas, hydrogen, sodium borohydride, and hydrazine to convert electricity into electricity, and use the fuel input from t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J37/10H01M4/90H01M4/92
CPCY02E60/50
Inventor 李洲鹏杨俊刘宾虹
Owner ZHEJIANG UNIV