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Method for preparing proton exchange membrane fuel cell supported catalyst

A technology of supported catalysts and proton exchange membranes, applied in chemical instruments and methods, physical/chemical process catalysts, battery electrodes, etc., can solve the problems of catalyst particle growth and aggregation, difficulty in preparing high-load catalysts, etc., and achieve simplification Effects of post-treatment process, simple preparation method, and mild reaction conditions

Active Publication Date: 2010-11-24
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also have a lot of people's report to use polyvinylpyrrolidone (PVP) as protecting agent, adopt liquid phase reduction method to make metal particle size is little, the catalyst with good dispersibility; Processing may lead to catalyst particle growth and aggregation; and in the presence of protective agents, it is often difficult to obtain high catalyst loadings

Method used

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  • Method for preparing proton exchange membrane fuel cell supported catalyst
  • Method for preparing proton exchange membrane fuel cell supported catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0030] In the reactor, 0.54g H2 PtCl 6 ·6H 2 O was dissolved in a mixed solvent of 20mL ethylene glycol and 20mL water, and then 0.3g of multi-walled carbon nanotubes (MWNTs) was added thereto to fully disperse to form a suspension. This suspension was heated to 90°C, 5 mL of formaldehyde solution was added to the mixed system, and stirred at 90°C for 2 hours. The resulting mixture was filtered, and the filter cake was rinsed with deionized water until the filtrate was neutral. drying at H 2 with N 2 Under the protection of mixed gas, the obtained black solid powder was calcined at 200°C for 3 hours, and the heating rate was 20°C / min to obtain a Pt / C supported catalyst with a mass percentage of Pt of 40wt%. The volume percentage of hydrogen in the catalyst is 5%, and the average particle diameter of the Pt metal particles in the supported catalyst is 3.0nm.

Embodiment 2

[0032] In the reactor, 0.36g H 2 PtCl 6 ·6H 2 O and 0.21 g RuCl 3 ·6H 2 O was dissolved in a mixed solvent of 16mL ethylene glycol and 16mL water, and then 0.8g of activated carbon was added to it to fully disperse to form a suspension. The suspension was stirred and heated to 70° C., 3 mL of formaldehyde solution was added dropwise to the mixed system, and stirred at 70° C. for 3 hours. The resulting mixture was filtered, and the filter cake was rinsed with deionized water until the filtrate was neutral. drying at H 2 Under the protection of a mixed gas with Ar gas, the obtained black solid powder was calcined at 200° C. for 3 hours, and the heating rate was 5° C. / min. Can obtain the mass percent composition of metal be 20wt%, the PtRu / C supported catalyst that the atomic ratio of Pt: Ru is 1: 1; Wherein the volume percent composition of the hydrogen in the mixed gas is 20%, in the loaded catalyst The average particle size of the Pt metal particles is 2.5 nm.

[0033]...

Embodiment 3

[0035] In the reactor, 0.54g H 2 PtCl 6 ·6H 2 O and 0.26g Co(NO 3 ) 2 ·6H 2 O was dissolved in a mixed solvent of 10mL ethylene glycol and 40mL water, and then 0.75g carbon nanotubes were added thereto to fully disperse to form a suspension. The suspension was heated to 90°C, 0.5mL of 0.1g / mL sodium borohydride aqueous solution was added to the mixed system, and then 5mL of formaldehyde solution was added, and stirred at 90°C for 2 hours. The resulting mixture was filtered, and the filter cake was rinsed with deionized water until the filtrate was neutral. drying at H 2 with N 2 Under the protection of mixed gas, the obtained black solid powder was calcined at 200°C for 3 hours, and the heating rate was 10°C / min, so that the mass percentage of Pt was 20wt%, and the mass percentage of Co was 5wt%. PtCo / C supported catalyst; wherein the volume percentage of hydrogen in the mixed gas is 5%, and the average particle diameter of the PtCo alloy metal particles in the support...

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Abstract

The invention relates to a method for preparing a proton exchange membrane fuel cell supported catalyst. The method comprises: dispersing soluble precursors of a carbon carrier and a metal active component in a mixed solvent of water and glycol in a reactor, stirring, and heating to 70 to 90 DEG C; adding solution of formaldehyde, and stirring at 70 to 90 DEG C for 2 to 3 hours to obtain solution containing a solid product; and filtering, eluting, drying and roasting to obtain the proton exchange membrane fuel cell supported catalyst. When the method of the invention is used, the reaction conditions are mild, the operation is simple, the controllability is high, high-temperature and non-aqueous system is not required, surfactant is not required to be added, and the pH value of the system is not required to be adjusted. The obtained supported catalyst has high dispersibility.

Description

technical field [0001] The invention relates to a preparation method of a proton exchange membrane fuel cell supported catalyst. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is considered to be the most promising "green energy" in the 21st century because of its high energy conversion rate, easy start-up, environmental friendliness, no noise, and long life. He was first developed for spacecraft: in the 1960s, it was developed by General Motors for NASA as an auxiliary power source on the Gemini space shuttle. Now, proton exchange membrane fuel cells have gradually turned to civilian use, and portable power sources and motor vehicle power sources have gradually become an important development direction in the field of fuel cells. Many countries and scientific research institutions have invested huge sums of money in research, and have high hopes for it. [0003] Electrode catalyst is one of the key materials of proton exchange membrane fuel cell....

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J23/46B01J23/44B01J23/89H01M4/92
CPCY02E60/50
Inventor 陈丽娟苏虹张兵郭燕川
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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