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Preparation method for preparing tin bisulfide catalyst of hydrogen for fuel cell

A tin disulfide, fuel cell technology, used in physical/chemical process catalysts, chemical instruments and methods, electrodes, etc., can solve problems such as affecting electrochemical performance, and achieve high efficiency utilization, improve catalytic activity, and improve dispersion. Effect

Inactive Publication Date: 2018-09-04
CHENDU NEW KELI CHEM SCI CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] Aiming at the serious agglomeration of tin disulfide nanoparticle catalysts prepared by hydrothermal method and impregnation method, which greatly affects its electrochemical performance, the present invention proposes a tin disulfide catalyst for the preparation of hydrogen for fuel cells Preparation method, thereby solving the problem of particle agglomeration of tin disulfide nano-catalysts, and greatly improving the catalytic activity of nano-tin disulfide catalysts for electrolysis of water

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  • Preparation method for preparing tin bisulfide catalyst of hydrogen for fuel cell
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Effect test

Embodiment 1

[0030](1) The pore diameter is 20nm, and the specific surface area of ​​the catalyst is 500m 2 The cross-linked polymer solid material of amino-modified porous silicone polysiloxane, silicone resin and silicone rubber per gram is placed in the CVD reaction chamber, the modified porous silicone solid material is heated to 480 ° C, and the CVD chamber pumps Vacuum to 0.1Pa, the CVD chamber is kept evacuated for 5 hours, argon is passed for 5 hours, oxygen is discharged, the gas concentration is controlled to be less than 0.001ppm, metal tin is heated to 290°C, thiourea is heated to 200°C, and the heating rate is controlled At 15°C / min, metal tin and thiourea were evaporated, the evaporation rate of thiourea was controlled at 1 mg / h, argon gas was introduced, and the flow rate of argon gas was controlled at 2 sccm. After chemical vapor deposition for 6 hours and 1 hour of heat preservation, the loaded particles with a diameter of 80nm tin disulfide silicone composite material;

...

Embodiment 2

[0035] (1) The pore diameter is 80nm, and the specific surface area of ​​the catalyst is 900m 2 The cross-linked polymer solid material of polyether modified porous silicone polysiloxane, silicone resin and silicone rubber per gram is placed in the CVD reaction chamber, and the modified porous silicone solid material is heated to 500 °C, and the CVD chamber Vacuumize to 10Pa, keep vacuuming the CVD chamber for 3 hours, pass argon gas for 8 hours, discharge oxygen, control the gas concentration to be less than 0.001ppm, heat metal tin to 250°C, heat thiourea to 190°C, and control the heating rate At 7°C / min, metal tin and thiourea were evaporated, the evaporation rate of thiourea was controlled at 20 mg / h, and argon gas was introduced, and the flow rate of argon gas was controlled at 50 sccm. After chemical vapor deposition for 6 hours and 1 hour of heat preservation, the loaded particle size was obtained. 20nm tin disulfide silicone composite material;

[0036] (2) Immerse th...

Embodiment 3

[0040] (1) The pore size is 100nm, and the specific surface area of ​​the catalyst is 300m 2 The cross-linked polymer solid material of phenol-based modified porous organosilicon polysiloxane, silicone resin and silicone rubber per g is placed in the CVD reaction chamber, and the modified porous organosilicon solid material is heated to 490 ° C, and the CVD chamber Evacuate to 0.1-10Pa, keep the CVD chamber evacuated for 3.5 hours, pass argon gas for 7 hours, discharge oxygen, control the gas concentration to be less than 0.001ppm, heat metal tin to 430°C, heat thiourea to 200°C, and heat up The speed is controlled at 7°C / min, metal tin and thiourea are evaporated, the evaporation rate of thiourea is controlled at 25 mg / h, argon gas is introduced, and the flow rate of argon gas is controlled at 2 sccm. After chemical vapor deposition for 6 hours and 1 hour of heat preservation, the loaded particles are obtained. Organosilicon composite material of tin disulfide with a diameter...

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Abstract

The invention provides a preparation method for preparing a tin bisulfide catalyst of hydrogen for a fuel cell. The method comprises the steps that modified porous organic silicon is adopted as a substrate, molten metal tin and thiourea are subjected to an evaporation source reaction, evaporated tin atoms preferentially enter nanometer gaps of organic silicon to be combined with a modified group and react with thiourea to generate tin bisulfide nanoparticles, organic silicon loaded with the tin bisulfide nanoparticles is immersed in hydrofluoric acid for etching, a carbon-covering layer is deposited, the tin bisulfide nanoparticles are fixed in the gaps, and a high-dispersion carbon-covering tin bisulfide nanoparticle catalyst is obtained; therefore, the aggregation effect in the preparation method is lowered, and the defects that the tin bisulfide nanoparticle catalyst is serious in aggregation, and the catalytic performance is affected are overcome. Accordingly, the organic silicon on the surface is etched with hydrofluoric acid, a carbon source uniformly wraps the surface of tin bisulfide at high temperature, corrosion of electrolyte on tin bisulfide can be inhibited, and the stability of the catalyst in the electrolyte is improved.

Description

technical field [0001] The invention relates to the technical field of hydrogen production by electrolysis of water in the fuel cell industry, in particular to a preparation method of a tin disulfide catalyst for preparing hydrogen for fuel cells. Background technique [0002] In order to reduce the consumption of fossil energy and solve the problem of environmental pollution, it is urgent to develop clean and renewable energy. Although solar energy, wind energy, tidal energy and geothermal energy have the characteristics of large reserves as clean energy, they have shortcomings such as intermittent and unstable. Hydrogen energy has the advantages of high combustion calorific value, about 3 times that of gasoline, the combustion product is water, clean and environmentally friendly, and the preparation method is simple. [0003] Hydrogen fuel vehicles refer to vehicles that use hydrogen as the main energy for mobility. The principle of the hydrogen fuel cell is to input hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C25B1/04C25B11/06
CPCB01J27/04C25B1/04C25B11/04Y02E60/36
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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