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Intermetallic compound nano-catalyst as well as preparation method and application thereof

An intermetallic compound, nanocatalyst technology, applied in the field of electrochemistry, can solve the problem of no intermetallic compound and so on

Active Publication Date: 2020-06-30
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no intermetallic compound that can catalyze the electrolysis of water to produce hydrogen

Method used

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  • Intermetallic compound nano-catalyst as well as preparation method and application thereof
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  • Intermetallic compound nano-catalyst as well as preparation method and application thereof

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preparation example Construction

[0031] The invention provides a method for preparing an intermetallic compound nano-catalyst, comprising: S1) mixing carbon black, iridium salt and gallium salt in a solvent, and obtaining the mixture after removing the solvent; S2) putting the mixture in a reducing atmosphere High temperature treatment is carried out to obtain the intermetallic compound nano catalyst.

[0032] The present invention has no special limitation on the sources of all raw materials, which can be commercially available.

[0033] Mix carbon black, iridium salt and gallium salt in a solvent; the carbon black can be commercial carbon black well known to those skilled in the art, without special restrictions, preferably commercial carbon black KJ600 and / or XC in the present invention -72R; the iridium salt is preferably iridium chloride; the gallium salt is preferably gallium nitrate; the mass ratio of the carbon black, iridium salt and gallium salt is preferably (35~45):(10~15):( 15~20), more preferab...

Embodiment 1

[0042] 40.00mg commercial carbon black KJ600, 11.38mg IrCl 3 With 16.38mg Ga(NO 3 ) 3 Disperse in 50 mL of water and stir evenly, and then perform rotary evaporation to remove solvent water to obtain a uniform mixture. The rotation speed during the rotary evaporation process is 90 rpm, the temperature of the water bath is 80° C., and the vacuum degree is 60 mbar.

[0043] The resulting homogeneous mixture was transferred to a quartz crucible, placed in a tube furnace, and then argon-hydrogen gas was introduced as a reducing gas (the volume ratio of argon and hydrogen was 95:5), and the tube furnace was heated at 5°C / min The temperature was raised to 800°C at a rate of 800°C, and kept for 8 hours; then the temperature was lowered to room temperature (20-30°C) at a rate of 5°C / min; the tube furnace was kept at normal pressure to obtain an intermetallic compound IrGa nano-catalyst.

[0044] The intermetallic compound IrGa nano-catalyst prepared in Example 1 of the present inven...

Embodiment 2

[0054] 40.00mg commercial carbon black KJ600, 11.38mg IrCl 3 With 16.38mg Ga(NO 3 ) 3 Disperse in 50 mL of water and stir evenly, and then perform rotary evaporation to remove solvent water to obtain a uniform mixture. The rotation speed during the rotary evaporation process is 90 rpm, the temperature of the water bath is 80° C., and the vacuum degree is 60 mbar.

[0055] The resulting homogeneous mixture was transferred to a quartz crucible, placed in a tube furnace, and then argon-hydrogen gas was introduced as a reducing gas (the volume ratio of argon and hydrogen was 95:5), and the tube furnace was heated at 5°C / min The temperature was raised to 800 ° C at a rate of 2 h, and then the temperature was lowered to room temperature (20-30 ° C) at a rate of 5 ° C / min; the tube furnace was kept at normal pressure to obtain an intermetallic compound IrGa nano-catalyst.

[0056] Carry out X-ray powder diffraction detection to the intermetallic compound IrGa nano-catalyst prepar...

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Abstract

The invention provides a preparation method of an intermetallic compound nano-catalyst, which comprises the following steps: S1) mixing carbon black, an iridium salt and a gallium salt in a solvent, and removing the solvent to obtain a mixture; and S2) carrying out high-temperature treatment on the mixture in a reducing atmosphere to obtain the intermetallic compound nano-catalyst. Compared with the prior art, the IrGa nano-particles in the intermetallic compound nano-catalyst prepared by the preparation method disclosed by the invention have catalytic activity; meanwhile, mesopores in a carbon carrier can improve the material transmission rate in a catalytic reaction, so that the carbon carrier has better activity and stability as a catalyst, and has better catalytic activity and application prospect in an acidic oxygen evolution reaction.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to an intermetallic compound nano catalyst, its preparation method and application. Background technique [0002] Energy is the basis for the existence and development of human society. Due to the limited reserves of fossil fuels, time-consuming and labor-intensive mining, and environmental pollution during use, the development of renewable clean energy is imminent in recent years. Such as solar energy, wind energy, geothermal energy, etc., but these forms of energy cannot meet people's needs anytime and anywhere. Therefore, the development of clean energy technologies also requires various energy conversion and storage methods, including water splitting, fuel cells, and carbon dioxide reduction. The core of these energy conversion and storage methods is a series of electrochemical reactions, one of which is the oxygen evolution reaction. For example, the ele...

Claims

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Application Information

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IPC IPC(8): B01J23/62C25B11/06C25B1/04
CPCB01J23/62C25B11/04C25B1/04B01J35/33Y02E60/36
Inventor 梁海伟陈林维
Owner UNIV OF SCI & TECH OF CHINA
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