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Fuel cell cathode catalyst and preparation method thereof, membrane electrode and fuel cell

A fuel cell cathode and catalyst technology, applied in battery electrodes, circuits, electrical components, etc.

Active Publication Date: 2020-09-29
QINGDAO CHUANGQI XINNENG CATALYSIS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to address the problem of how to improve the catalytic activity and stability of the cathode catalyst at the same time, provide a fuel cell cathode catalyst and its preparation method, membrane electrode and fuel cell

Method used

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  • Fuel cell cathode catalyst and preparation method thereof, membrane electrode and fuel cell
  • Fuel cell cathode catalyst and preparation method thereof, membrane electrode and fuel cell
  • Fuel cell cathode catalyst and preparation method thereof, membrane electrode and fuel cell

Examples

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preparation example Construction

[0035] See figure 1 , the preparation method of fuel cell cathode catalyst of one embodiment of the present invention, comprises the following steps:

[0036] S10. Provide or prepare a nitrogen-doped carbon support deposited with platinum alloy nanoparticles; wherein, the platinum alloy nanoparticles include platinum and at least one 3d transition metal.

[0037] Preferably, the platinum alloy nanoparticles are selected from at least one of platinum-cobalt alloy nanoparticles, platinum-nickel nanoparticles and platinum-iron nanoparticles.

[0038] Preferably, the platinum alloy nanoparticles further include one or both of manganese, iridium, rhodium, niobium and zirconium.

[0039] Preferably, the particle diameter of the platinum alloy nanoparticles ranges from 3nm to 6nm.

[0040] Among them, the 3d transition metal refers to the metal in which the last electron is arranged in the 3d orbital when the electron arrangement of the atom is arranged. Examples include metals su...

Embodiment 1

[0083] 100mg XC-72 carbon carrier (average particle size 2μm, BET 250m 2 / g) in H 2 SO 4 / HNO 3 (v / v=3:1) stirred at room temperature for 2h, then mixed with 200mg H 2 PtCl 6 , 200mg Co(NO 3 ) 2 Add together 50mL ethylene glycol, mix well, then add 50mgNaBH 4 , after sufficient reaction, a carbon support deposited with platinum alloy nanoparticles was obtained.

[0084] After washing and drying the carbon carrier deposited with platinum alloy nanoparticles, the first heat treatment was carried out at 700° C. for 4 hours in an ammonia atmosphere to obtain a product after the first heat treatment.

[0085] The above product was acid-treated in nitric acid with a pH of 1.0 for 2 hours, filtered and washed for a second heat treatment in an argon atmosphere at 250° C. for 1 hour, and the fuel cell cathode catalyst of Example 1 was obtained.

[0086] After characterization, in the obtained fuel cell cathode catalyst, the mass fraction of nitrogen in the nitrogen-doped carbon...

Embodiment 2

[0088] 100mg XC-72 carbon carrier (average particle size 2μm, BET 250m 2 / g) in H 2 SO 4 / HNO 3 (v / v=3:1) stirred at room temperature for 2h, then mixed with 200mg H 2 PtCl 6 , 300mgNiCl 2 Add together 50mL ethylene glycol, mix well, then add 50mgNaBH 4 , after sufficient reaction, a carbon support deposited with platinum alloy nanoparticles was obtained.

[0089] After washing and drying the carbon carrier deposited with platinum alloy nanoparticles, the first heat treatment was carried out at 700° C. for 4 hours in an ammonia atmosphere to obtain a product after the first heat treatment.

[0090]The above product was acid-treated in nitric acid with a pH of 1.0 for 2 hours, filtered and washed for a second heat treatment in an argon atmosphere at 250° C. for 1 hour, and the fuel cell cathode catalyst of Example 2 was obtained.

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Abstract

The invention relates to a fuel cell cathode catalyst and a preparation method thereof, a membrane electrode and a fuel cell. The preparation method of the fuel cell cathode catalyst comprises the following steps: providing or preparing a nitrogen-doped carbon carrier deposited with platinum alloy nanoparticles, wherein the platinum alloy nanoparticles comprise platinum and at least one 3d transition metal; and carrying out acid treatment to consume the 3d transition metal on the surface layer of the platinum alloy nanoparticles, and then, carrying out heat treatment for 1-20 h at the temperature of 100-300 DEG C to obtain the fuel cell cathode catalyst. The fuel cell cathode catalyst prepared by the preparation method has excellent catalytic activity and stability, and is beneficial to industrial application.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell cathode catalyst, a preparation method thereof, a membrane electrode and a fuel cell. Background technique [0002] A proton exchange membrane fuel cell (PEMFC, proton exchange membrane fuel cell) is a fuel cell that converts chemical energy into electrical energy through the cold combustion of hydrogen, with water as the only emission. PEMFC is the core of the hydrogen energy economy, and its cathode oxygen reduction reaction has a high overpotential, which requires noble metal platinum catalysts to achieve efficient utilization of hydrogen energy. Reducing the amount of platinum in the cathode catalyst is the key to realize the large-scale commercial application of PEMFC. The alloying of platinum with 3d transition metals has been proven to be an effective means to reduce the amount of platinum. However, the transition metals in alloy catalysts are easily lost,...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90H01M4/92
CPCH01M4/921H01M4/926H01M4/9058H01M4/88Y02E60/50
Inventor 王中奇王恒卢荻高正飞史曦伶
Owner QINGDAO CHUANGQI XINNENG CATALYSIS TECH CO LTD
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