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Preparation method and application of nitrogen-doped carbon nanotube-ruthenium dioxide composite material

A technology of nitrogen-doped carbon and ruthenium dioxide, which is applied in the field of nanomaterials, can solve the problems of easy agglomeration conductivity, lack of conductivity, high price of ruthenium dioxide, etc., and achieves the effects of high catalytic performance, simple method and excellent catalytic performance.

Active Publication Date: 2018-10-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The first object of the present invention is to provide a method for preparing nitrogen-doped carbon nanotube-ruthenium dioxide composite material, so as to solve the problem that the existing ruthenium dioxide is not good because of its high price, easy agglomeration and lack of electrical conductivity. At the same time, the preparation method is simple, environmentally friendly, and economical, and the prepared nitrogen-doped carbon nanotube-ruthenium dioxide composite material has excellent electrical conductivity and OER catalytic performance

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  • Preparation method and application of nitrogen-doped carbon nanotube-ruthenium dioxide composite material

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Embodiment 1

[0041] A preparation method of nitrogen-doped carbon nanotube-ruthenium dioxide composite material, comprising the following steps:

[0042] 1) Dissolve 0.4g hexaammonium trichloride ruthenium in 40ml ethanol to prepare hexaammonium trichloride ruthenium solution;

[0043] 2) Dissolve 0.22g of sodium hydroxide in 40ml of ethanol to obtain a sodium hydroxide solution;

[0044] 3) Take 7mL of nitrogen-doped carbon nanotubes with a solid content of 3wt% and mix them with hexammonium trichloride ruthenium solution (at this time, the mass ratio of nitrogen-doped carbon nanotubes to hexammonium trichloride ruthenium trichloride is 1:2 ), then add sodium hydroxide solution dropwise, control the reaction temperature to be 25°C, and stir at a rate of 600r / min, adjust and control the final pH value of the reaction system with sodium hydroxide solution to be 10;

[0045] 4) After reaching the final pH requirement of the reaction system, aging at a constant temperature of 70°C for 4 hour...

Embodiment 2

[0054] A preparation method of nitrogen-doped carbon nanotube-ruthenium dioxide composite material, comprising the following steps:

[0055] 1) 3g ruthenium trichloride is dissolved in 150ml water, makes ruthenium trichloride solution;

[0056] 2) Dissolve 1.50g of sodium hydroxide in 150ml of water to obtain a sodium hydroxide solution;

[0057] 3) Take 78.75mL of nitrogen-doped carbon nanotubes with a solid content of 3wt% and mix them with ruthenium trichloride solution (at this time, the mass ratio of nitrogen-doped carbon nanotubes to ruthenium trichloride is 1:2), and then dropwise Add sodium hydroxide solution, control the reaction temperature to 25°C, stir at a rate of 500r / min, adjust and control the final pH value of the reaction system to 10 with sodium hydroxide solution;

[0058] 4) After reaching the final pH value requirement of the reaction system, aging at a constant temperature of 60° C. for 5 hours;

[0059] 5) Wash the aged solution by centrifugation, put...

Embodiment 3

[0063] A preparation method of nitrogen-doped carbon nanotube-ruthenium dioxide composite material, comprising the following steps:

[0064] 1) Dissolve 1 g of ruthenium nitrosyl nitrate in 100 mL of deionized water / ethanol at a ratio of 1:1, and sonicate for 0.5 h;

[0065] 2) Dissolve 0.56g of sodium hydroxide in 100mL of deionized water / ethanol at a ratio of 1:1, and sonicate for 0.5h;

[0066] 3) Mix 78.75mL of nitrogen-doped carbon nanotube solution with a solid content of 3wt% and ruthenium nitrosyl nitrate solution (at this time, the mass ratio of nitrogen-doped carbon nanotubes to ruthenium nitrosyl nitrate is 1:2), Add sodium hydroxide solution dropwise to the mixed solution, control the reaction temperature to 35°C, and stir at a rate of 800r / min, adjust and control the final pH value of the reaction system to 11 with sodium hydroxide solution;

[0067] 4) After the final pH value requirement of the reaction system is reached, the temperature is raised to 90° C., an...

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Abstract

The invention discloses a preparation method of a nitrogen-doped carbon nanotube-ruthenium dioxide composite material. The preparation method comprises the following steps: 1) mixing a nitrogen-dopedcarbon nanotube solution with a ruthenium-source solution to obtain a mixed solution, adding an alkali solution into the mixed solution, and uniformly carrying out mixing to obtain a precursor solution with a pH value of 10-12; 2) carrying out aging on the precursor solution at a temperature of 50-90 DEG C for 3-5 hours, and then carrying out centrifuging and washing to obtain a precipitate; and 3) carrying out a hydrothermal reaction or calcination on the precipitate to obtain the nitrogen-doped carbon nanotube-ruthenium dioxide composite material. The nitrogen-doped carbon nanotube-rutheniumdioxide composite material obtained by the preparation method has excellent OER catalytic performance and electrical conductivity. The invention also discloses an application of the composite material obtained by the preparation method in a catalytic oxygen evolution reaction.

Description

technical field [0001] The invention relates to the technical field of nanometer materials. More specifically, it relates to a preparation method and application of a nitrogen-doped carbon nanotube-ruthenium dioxide composite material. Background technique [0002] Nano ruthenium oxide (nano ruthenium dioxide) is a noble metal oxide, which has high specific capacitance, high conductivity and low resistivity, and is widely used in supercapacitors, catalysts and electrochemical catalysis. In the application of catalysts, nano-ruthenium oxide has been proved that its (110) crystal face has good catalytic performance for OER (oxygen evolution reaction), but its application is limited due to its high price, easy agglomeration and lack of electrical conductivity. [0003] At present, there are many technologies for preparing carbon nanotube-ruthenium oxide composite materials at home and abroad, and the common method is to prepare carbon-group-ruthenium oxide composite materials ...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J27/24B01J35/02C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J23/462B01J27/24B01J35/33B01J35/40Y02E60/36
Inventor 王洁欣杨辉煌陈建峰孙向楠崔易凡曾晓飞张亮亮
Owner BEIJING UNIV OF CHEM TECH
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