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A solvothermal reduction carbon-supported platinum-based catalyst for fuel cell and a preparation method and application thereof

A technology of fuel cell and solvothermal method, which is applied in the direction of fuel cells, battery electrodes, electrochemical generators, etc., and can solve problems such as high requirements for surfactants or protective agents and operating conditions, difficulty in mass production, and complicated operations , to achieve the effect of improving the utilization rate of precious metals, easy regulation and uniform particle size

Inactive Publication Date: 2018-12-07
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has high requirements on solvents, surfactants or protective agents and operating conditions, and at the same time, the operation is complicated, the cost is high, and it is not easy to produce in large quantities.

Method used

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  • A solvothermal reduction carbon-supported platinum-based catalyst for fuel cell and a preparation method and application thereof
  • A solvothermal reduction carbon-supported platinum-based catalyst for fuel cell and a preparation method and application thereof
  • A solvothermal reduction carbon-supported platinum-based catalyst for fuel cell and a preparation method and application thereof

Examples

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Embodiment 1

[0037] A method for preparing a carbon-supported platinum-based catalyst applied to a fuel cell, comprising the following process steps:

[0038] 1) Weigh 80 mg of the purchased XC-72 with an analytical balance, add 40.00 mL of ethylene glycol solution, and disperse alternately by ultrasonication and stirring for more than 1 hour until XC-72 is evenly dispersed in the ethylene glycol solution;

[0039] 2) Add 5.25mL chloroplatinic acid ethylene glycol solution (3.81mg / mL) dropwise, and stir to disperse for more than 3h;

[0040] 3) Add dropwise 1mol / L NaOH ethylene glycol solution, adjust the pH value of the solution obtained in step 2) to 11, and fully disperse to obtain a mixed solution;

[0041] 4) Place the mixed solution obtained in step 3) in a high-pressure sealed reaction vessel, heat it to 140°C with an external source, and heat it for 3 hours to obtain a reaction solution; after the reaction solution is naturally cooled to room temperature, add 0.5mol / L drop by drop ...

Embodiment 2

[0048] A method for preparing a carbon-supported platinum-based catalyst applied to a fuel cell, comprising the following process steps:

[0049] 1) Weigh 80 mg of the purchased XC-72 with an analytical balance, add 40.00 mL of ethylene glycol solution, and disperse alternately by ultrasonication and stirring for more than 1 hour until XC-72 is evenly dispersed in the ethylene glycol solution;

[0050] 2) Add 5.25mL chloroplatinic acid ethylene glycol solution (3.81mg / mL) dropwise, and stir to disperse for more than 3h;

[0051] 3) Add dropwise 2mol / L KOH ethylene glycol solution, adjust the pH value of the solution obtained in step 2) to 13, and fully disperse to obtain a mixed solution;

[0052] 4) Place the mixed solution obtained in step 3) in a high-pressure sealed reaction vessel, heat it to 140°C with an external source, and heat it for 2 hours to obtain a reaction solution. After the reaction solution is naturally cooled to room temperature, add 0.5mol / L dropwise HCl ...

Embodiment 3

[0058] A method for preparing a carbon-supported platinum-based catalyst applied to a fuel cell, comprising the following process steps:

[0059] 1) Weigh 80 mg of purchased XC-72 with an analytical balance, add 35 mL of ethylene glycol solution, and disperse alternately by ultrasonication and stirring for more than 1 hour until XC-72 is uniformly dispersed in the ethylene glycol solution;

[0060] 2) Add 10.5mL chloroplatinic acid ethylene glycol solution (3.81mg / mL) dropwise, and stir to disperse for more than 3h;

[0061] 3) Add 1mol / L NaOH ethylene glycol solution dropwise, adjust the pH value of the solution obtained in step 2) to 13, and fully disperse to obtain a mixed solution;

[0062] 4) Place the mixed solution obtained in step 3) in a high-pressure sealed reaction vessel, heat it to 140°C with an external source, and heat it for 5 hours to obtain a reaction solution. After the reaction solution is naturally cooled to room temperature, add 0.5mol / L dropwise HNO 3 ...

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Abstract

The invention discloses a method for preparing a carbon-supported platinum-based catalyst of a fuel cell by a solvothermal method, which is applied to a proton exchange membrane fuel cell and comprises the steps of: In the cathode reaction of oxygen fuel cell and direct alcohol fuel cell, it belongs to the electrochemical catalytic reaction field. A solvothermal reduction process is used, A support carbon material is sufficiently dispersed in a solvent, A metal precursor solution is added with stirring, that mass percentage of the active ingredient reaches 20 to 60 wt% in the prepared catalyst, the pH value of the solution is adjusted to above 9 by an alkaline solution, and the mixture is react in a high-temperature and high-pressure sealed reaction vessel. After the reaction, the pH valuewas adjusted to less than 5 by acidic solution, and the reaction solution was filtered, washed, dried and ground to obtain carbon-supported platinum-based electrocatalyst. The catalyst active ingredient prepared by the invention has small particle diameter and is uniformly dispersed on a carbon carrier, and has high activity. The preparation process of the invention is simple in operation, rapidin reaction, low in energy consumption, low in cost, and easy to realize mass industrial production.

Description

technical field [0001] The invention belongs to the field of proton exchange membrane fuel cell catalysts, including hydrogen-oxygen fuel cell catalysts and direct alcohol fuel cell catalysts, and relates to a preparation method of a carbon-supported platinum-based material, in particular to a solvent using a sealed reaction vessel under high temperature and high pressure Thermal preparation methods and applications. Background technique [0002] A fuel cell is an energy conversion device that converts chemical energy into electrical energy. It has attracted people's attention due to its advantages of high energy conversion efficiency, low environmental pollution, and convenient fuel portability. Proton exchange membrane fuel cell (PEMFC) has attracted much attention due to its advantages of high energy density, low operating temperature and no pollution. There are generally two sources of fuel for PEMFC: one directly uses pure hydrogen or reformed hydrogen-rich gas as fuel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M8/1011H01M8/22B82Y30/00
CPCB82Y30/00H01M4/926H01M8/1011H01M8/22Y02E60/50Y02P70/50
Inventor 宋树芹曾融蓉王毅饶学凯
Owner SUN YAT SEN UNIV
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