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Preparation method of proton exchange membrane fuel cell catalyst

A proton exchange membrane and fuel cell technology, applied in solid electrolyte fuel cells, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low electrochemical performance, difficulty in preparing catalysts, and reduced particle size uniformity of metal particle catalysts and other problems to achieve the effect of uniform particle size and high electrochemical performance

Active Publication Date: 2013-05-08
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to prepare a catalyst with a uniform microscopic state by the above-mentioned methods, and the obtained catalyst generally produces the aggregation of metal particles, and the uniformity of the particle size of the catalyst decreases, resulting in low electrochemical performance.

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  • Preparation method of proton exchange membrane fuel cell catalyst
  • Preparation method of proton exchange membrane fuel cell catalyst
  • Preparation method of proton exchange membrane fuel cell catalyst

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preparation example Construction

[0034] The invention provides a preparation method of a proton exchange membrane fuel cell catalyst, which comprises the following steps:

[0035] A) Mix the precious metal halide solution and carbon black, adjust the pH to 2.5~10.5, and perform ultrasonic stirring to obtain the precursor fluid;

[0036] The precious metal halide is a platinum halide or a mixture of platinum halide and ruthenium halide;

[0037] B) Add the precursor liquid to the sodium borohydride solution, and perform ultrasonic stirring to obtain a mixed liquid;

[0038] C) The mixed solution is allowed to stand still, filtered, washed and dried to obtain a proton exchange membrane fuel cell catalyst.

[0039] The present invention first adds carbon black to the precious metal halide solution to mix, adjusts the pH value of the solution and performs ultrasonic stirring to obtain a precursor fluid. The noble metal halide is a platinum halide or a mixture of platinum halide and ruthenium halide, wherein the platinum h...

Embodiment 1

[0050] Dissolve chloroplatinic acid in deionized water to prepare a 1L aqueous solution, in which the platinum ion content in the solution is 5g / L. Add carbon black to the chloroplatinic acid solution for adsorption, so that the loading of chloroplatinic acid on the carbon black is 20wt %, ultrasonic agitation to obtain a suspension, heat the suspension to 50° C., hold for 1 hour, adjust the pH of the suspension to 7.5 with an aqueous ammonia solution, and stir the suspension under ultrasonic conditions for 30 minutes to obtain a precursor fluid.

[0051] Take 1 g of sodium borohydride and add it to 10 mL of deionized water to prepare a sodium borohydride solution.

[0052] The precursor fluid is quickly poured into the sodium borohydride solution, while ultrasonic stirring is performed, and the mixture is maintained for 1 hour to obtain a mixed solution.

[0053] The mixed solution is allowed to stand for 1 hour and filtered to obtain a solid substance, which is washed with deionize...

Embodiment 2

[0063] Dissolve chloroplatinic acid / chlororuthenic acid in deionized water to prepare a 1L aqueous solution, in which the content of platinum ion and ruthenium ion in the solution is 5g / L, and the molar ratio of platinum to ruthenium is 1:0.5. Add carbon black to the chlororuthenic acid solution for adsorption so that the loading of chloroplatinic acid / chlororuthenic acid on the carbon black is 60wt%. Stir ultrasonically to obtain a suspension. Heat the suspension to 50°C and keep it for 1 hour. The pH value of the suspension was adjusted to 7.5 by the aqueous ammonia solution, and the suspension was stirred under ultrasonic conditions for 30 minutes to obtain a precursor fluid.

[0064] Take 5 g of sodium borohydride and add 10 mL of deionized water to prepare a sodium borohydride solution.

[0065] The precursor fluid is quickly poured into the sodium borohydride solution, while ultrasonic stirring is performed, and the mixture is maintained for 1 hour to obtain a mixed solution....

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Abstract

The invention provides a preparation method of a proton exchange membrane fuel cell catalyst. The preparation method comprises the following steps of: mixing a noble metal halide solution and carbon black, adjusting the pH value to 2.5-10.5, and then carrying out ultrasonic wave stirring to obtain precursor liquid, wherein the noble metal halide solution is platinum halide or a mixture of platinum halide and ruthenium halide; adding the precursor liquid to a sodium borohydride solution, and carrying out ultrasonic wave stirring to obtain a mixed liquid; and standing, filtering, washing and drying the mixed liquid to obtain the proton exchange membrane fuel cell catalyst. The proton exchange membrane fuel cell catalyst prepared by the method has uniform particle size and high electrochemical performance.

Description

Technical field [0001] The invention relates to the field of catalysts, in particular to a preparation method of a proton exchange membrane fuel cell catalyst. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a new type of device that can directly convert chemical energy into electrical energy. Since the proton exchange membrane battery has no internal energy consumption of rotating parts, does not undergo combustion, and the energy conversion efficiency is not limited by the Carnot cycle, it has a higher energy conversion efficiency. In addition, the proton exchange membrane battery uses clean energy sources, such as hydrogen and methanol, has no sulfur oxide and nitride emissions, is harmless to the environment, and has high environmental protection. The proton exchange membrane battery also has the characteristics of mild working conditions, small size, light weight, safety and durability, and is widely used as a mobile power source. It is also an i...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J23/46H01M4/92H01M8/10
CPCY02E60/521Y02E60/50
Inventor 刘长鹏梁亮廖建辉李晨阳邢巍
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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