Self-supporting composite material as well as preparation method and application thereof

A composite material, self-supporting technology, applied in the field of electrocatalysis, can solve the problems of poor stability for a long time

Active Publication Date: 2021-08-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The OER catalytic performance of catalysts synthesized by this traditional method is poor in long-term stability at high current densities

Method used

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  • Self-supporting composite material as well as preparation method and application thereof
  • Self-supporting composite material as well as preparation method and application thereof
  • Self-supporting composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The invention provides a kind of preparation method of self-supporting composite material, comprises the following steps:

[0033] Etching the foamed titanium with acid to obtain etched foamed titanium;

[0034] The self-supporting composite material is obtained by mixing the etched foam titanium, the soluble ruthenium source and the acid solution, and performing a solvothermal reaction.

[0035] In the invention, the foamed titanium is acid-etched to obtain etched foamed titanium. In the present invention, the thickness of the titanium foam is preferably 0.5-0.7 mm, more preferably 0.6 mm; the pore diameter is preferably 0.04-0.06 mm, more preferably 0.05 mm. In the present invention, there is no special limitation on the size of the foamed titanium, which can be set as required. In the present invention, before the acid etching, it is preferable to further include: washing the foamed titanium with water, acetone and absolute ethanol in sequence. In the present inve...

Embodiment 1

[0066] Cut the titanium foam with a thickness of 0.6mm into a rectangle of 60mm×10mm, and then ultrasonically wash it with ultrapure water, acetone and absolute ethanol for 15 minutes respectively;

[0067] Soak the washed titanium foam in 30mL of 18% hydrochloric acid aqueous solution, acid etch at 90°C for 15min; use 80mL of ultrapure water to ultrasonically wash the acid-etched titanium foam for 4min at a power of 1000W to medium properties, to get etched foam titanium;

[0068] Ruthenium trichloride and 3% hydrochloric acid aqueous solution were mixed to obtain 15 mmol / L ruthenium trichloride solution, and the pH value of the ruthenium trichloride solution was 3.60;

[0069] Put the etched foamed titanium in 10 mL of ruthenium trichloride solution, perform solvothermal reaction at 200 ° C for 20 h, cool down to 25 ° C for solid-liquid separation, and wash the solid obtained by the solid-liquid separation with ultrapure water for 3 and anhydrous ethanol for 3 times, and th...

Embodiment 2

[0071] The self-supporting composite material was prepared according to the method of Example 1, except that the temperature of the solvothermal reaction was 160°C.

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Abstract

The invention belongs to the technical field of electro-catalysis, and particularly relates to a self-supporting composite material and a preparation method and application thereof. The invention provides a self-supporting composite material. The self-supporting composite material comprises a foam titanium carrier, titanium dioxide nanorods vertically growing on the surface of the foam titanium carrier and ruthenium nanoparticles loaded on the surfaces of the titanium dioxide nanorods, the top ends of the titanium dioxide nanorods are in a pyramid shape, and the titanium dioxide nanorods are distributed on the surface of the foam titanium carrier in an array mode. According to the invention, the titanium dioxide nanorods have good stability under the acidic condition, and meanwhile, the stability of the ruthenium nanoparticles can be improved due to the metal-carrier interaction (SMSI) between the titanium dioxide nanorods and the ruthenium nanoparticles. In the invention, the top ends of the titanium dioxide nanorods are pyramid-shaped, and the loading area of the ruthenium nanoparticles is increased, so that the exposure of active sites of the ruthenium nanoparticles is improved, and the catalytic activity of the self-supporting composite material is further improved.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and in particular relates to a self-supporting composite material and its preparation method and application. Background technique [0002] With the advancement of science and technology and the development of social industry, the energy crisis is becoming more and more serious, and people are paying more and more attention to the shortage of fossil fuels and the deterioration of environmental pollution. At present, the vast majority of pollutants in the atmosphere come from the combustion of fossil fuels. Fossil energy such as coal, oil, and natural gas is still the main energy needed for the development of the global economy and social industry. However, it is a non-renewable energy with limited reserves, which makes The development of clean energy such as solar energy, wind energy, and hydrogen energy has become an urgent task in the field of scientific research. [0003] Hydrogen en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J35/04C25B1/04C25B11/03C25B11/093
CPCC25B1/04C25B11/03B01J35/04B01J35/0033B01J23/462Y02E60/36Y02P20/133
Inventor 吕瑞涛周灵犀黄正宏康飞宇
Owner TSINGHUA UNIV
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