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Embedded alloy catalyst and preparation method and application thereof

An alloy catalyst and embedded technology, applied in solid electrolyte fuel cells, electrical components, battery electrodes, etc., can solve the problems of high price, low storage capacity of Pt metal, easy poisoning, etc., and achieve improved stability and strong electron affinity The effect of improving the ability and catalytic efficiency

Inactive Publication Date: 2020-05-12
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of low storage capacity, high price, and easy poisoning of Pt metal, the development of high-activity, high-durability low-platinum catalysts is the current research focus.

Method used

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  • Embedded alloy catalyst and preparation method and application thereof
  • Embedded alloy catalyst and preparation method and application thereof
  • Embedded alloy catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The preparation method of embedded alloy catalyst comprises the following steps:

[0065] (1') Weigh 0.01g of Vulcan XC-72 carbon black and place it in a reaction vessel, add 1mL of water to it, then place it in an ultrasonic homogenizer to disperse evenly, and continue ultrasonication for 10min to obtain Vulcan XC-72 carbon black black dispersion;

[0066] (2') Add 50 μL of pyrrole monomer solution (density of 0.967g / mL) into the Vulcan XC-72 carbon black dispersion in step (1'), and continue to stir for 10 minutes to make the pyrrole monomer absorb as much as possible on the The surface of Vulcan XC-72 carbon black, obtain mixed solution;

[0067] (3') Take 670 μL of chloroplatinic acid solution with a platinum element concentration of 0.01 g / mL, and quickly add it to the mixed solution obtained in step (2') under the condition of vigorous stirring, and then continue stirring at room temperature for 10 h, pass The oxidative properties of high-valence Pt make pyrrole...

Embodiment 2

[0074] The preparation method of embedded alloy catalyst comprises the following steps:

[0075] (1') Weigh 10g of Vulcan XC-72 carbon black and place it in a reaction vessel, add 100mL of ethanol to it, then place it in an ultrasonic homogenizer to disperse evenly, and continue ultrasonication for 60min to obtain Vulcan XC-72 carbon black Dispersions;

[0076] (2') Add 2000 μL of aniline monomer solution (with a density of 1.022 g / mL) into the Vulcan XC-72 carbon black dispersion in step (1'), and continue stirring for 60 minutes to make the aniline monomer adsorb as much as possible to the The surface of Vulcan XC-72 carbon black, obtain mixed solution;

[0077] (3') Take 23.3mL of potassium hexachloroplatinate solution with a platinum element concentration of 0.01g / mL, and quickly add it to the mixed solution obtained in step (2') under vigorous stirring, and then continue to Stir for 48 hours, then filter the product with suction, wash it three times with a mixture of N,...

Embodiment 3

[0080] The preparation method of embedded alloy catalyst comprises the following steps:

[0081] (1') Weigh 8 g of Ketjen Black and place it in a reaction vessel, add 60 mL of oleic acid thereto, then place it in an ultrasonic homogenizer to disperse evenly, and continue ultrasonication for 50 minutes to obtain a Ketjen Black dispersion;

[0082] (2') Add 1350 μL 3,4-ethylenedioxythiophene solution (density 1.331g / mL) into the Ketjen Black dispersion in step (1'), and continue stirring for 45 minutes to make 3,4-ethylenedioxythiophene Thiophene is adsorbed onto the surface of Ketjen Black as much as possible to obtain a mixed solution;

[0083] (3') Take 800 μL of potassium tetrachloroplatinate solution with a platinum element concentration of 0.01 g / mL, and quickly add it to the mixed solution obtained in step (2') under vigorous stirring, and then continue stirring at room temperature After 12 hours, the product was suction filtered, rinsed three times with a mixture of n-b...

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Abstract

The invention relates to an embedded alloy catalyst and a preparation method and application thereof. The alloy catalyst comprises a carbon substrate material, a nitrogen-doped carbon material locatedon the surface of the carbon substrate material and noble metal nanoparticles, and the noble metal nanoparticles are embedded into the nitrogen-doped carbon material; the electron conduction capability and the oxygen reduction activity of the alloy catalyst are improved through the synergistic effect between the nitrogen-doped carbon material and the noble metal nanoparticles in the alloy catalyst; if the noble metal is Pt, the mass activity of the alloy catalyst can be more than two times that of traditional platinum carbon, the alloy catalyst has excellent stability, and the activity attenuation is 31% or below after 30,000 circles of accelerated circulation; and a membrane electrode of 5*10cm2 is prepared from the graphene oxide, a single battery is assembled for testing, and it is ensured that the current density can reach 2800mA / cm2 at 0.6V under the conditions that the battery temperature is 75 DEG C, the humidifying temperature is 70 DEG C, the RH is 60% and the stoichiometricratio of hydrogen to air is 1.2 / 2.2.

Description

technical field [0001] The invention belongs to the field of fuel cells and relates to an embedded alloy catalyst as well as its preparation method and application. Background technique [0002] Proton exchange membrane fuel cells (PEMFCs) have the characteristics of high energy conversion efficiency, low-temperature quick start, low noise, and no pollution. They are considered to be very suitable as power sources for green new energy vehicles. Proton exchange membrane fuel cell is composed of catalyst, proton exchange membrane, gas diffusion layer and bipolar plate. Its working principle is that hydrogen separates protons and electrons at the anode, the protons pass through the proton exchange membrane to the cathode, and the electrons reach the cathode through an external circuit. 2 Combined under the action of the cathode catalyst to generate water, the specific electrode reaction is: [0003] Anode: H 2 →2H + +2e - ; [0004] Cathode: 1 / 2O 2 +2H + +2e - →H 2 O;...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/92H01M8/10
CPCH01M4/8878H01M4/926H01M8/10Y02E60/50
Inventor 于力娜朱云朱雅男张克金唐柳杨帅
Owner FAW JIEFANG AUTOMOTIVE CO
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