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Preparation method of high-temperature proton exchange membrane fuel cell cathode catalyst

A fuel cell cathode and proton exchange membrane technology, which is applied in the field of materials science, can solve the problems of low utilization rate, poor stability and high loading of noble metal catalysts, and achieves the improvement of oxygen reduction activity, electrochemical stability, and electrochemical activity. Effect

Active Publication Date: 2022-01-11
SHANGHAI INST OF SPACE POWER SOURCES +1
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  • Description
  • Claims
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Problems solved by technology

However, at present, the commonly used catalysts for HT-PEMFC cathodes are carbon-supported platinum or carbon-supported platinum alloys, which have the problems of low utilization rate, high loading capacity and poor stability of noble metal catalysts, which severely limit the application of HT-PEMFC.

Method used

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  • Preparation method of high-temperature proton exchange membrane fuel cell cathode catalyst
  • Preparation method of high-temperature proton exchange membrane fuel cell cathode catalyst
  • Preparation method of high-temperature proton exchange membrane fuel cell cathode catalyst

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preparation example Construction

[0035] The invention provides a method for preparing a high-temperature proton exchange membrane fuel cell cathode catalyst, comprising the following steps:

[0036] 1) Preparation of black phosphorus nanosheets: Weigh 1-3g red phosphorus (RP), put it in a reaction kettle together with 15-25mL deionized water, and heat it at 160-180°C for more than 15h to remove the surface oxide layer. Dry and grind into powder, mix 400-600mg RP, 18-24mg Sn and 10-15mg SnI 4 Add to the quartz tube to vacuumize and seal, at 5°C min -1The heating rate is heated to 650°C for 2-3h, then cooled to 450-500°C, kept for 5-7h and then cooled to room temperature. The obtained black phosphorus (BP) crystals were washed several times with hot toluene and acetone, and placed in a glove box with Ar for use. In an argon-filled glove box, weigh 200 mg of blocky BP crystals, grind them into powder with an agate mortar, add to 50-70 mL of NMP (N-methylpyrrolidone) solution, and grind in a cell pulverizer at ...

Embodiment 1

[0047] A preparation method of black phosphorus-activated graphene composite material loaded platinum nanoparticles, specifically comprising the following steps:

[0048] (1) Preparation of black phosphorus-activated graphene composites

[0049] ①Preparation of black phosphorus nanosheets: Weigh 2g of red phosphorus (RP), put it in a reaction kettle together with 25mL of deionized water, and heat it at 160-180℃ for more than 15h to remove the surface oxide layer. Dry and grind into powder, mix 400-600mg RP, 18-24mg Sn and 10-15mg SnI 4 Add to the quartz tube to vacuumize and seal, at 5°C min -1 The heating rate is heated to 650°C for 3h, then cooled to 500°C, kept for 6h and then cooled to room temperature. The obtained black phosphorus (BP) crystals were washed several times with hot toluene and acetone at 70 °C, and placed in a glove box filled with Ar for use. In a glove box filled with argon gas, weigh 200 mg of bulk BP crystals, grind them into powder with an agate mor...

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Abstract

The invention provides a preparation method of a high-temperature proton exchange membrane fuel cell cathode catalyst. The method comprises the following steps: firstly, preparing a black phosphorus nanosheet layer material, further performing mechanical ball milling on the black phosphorus nanosheet layer and an alkali liquor activated graphene sheet layer, and heating in a reaction kettle to effectively form a heterostructure between black phosphorus and activated graphene; and finally, adding a metal precursor and a reducing agent according to a certain proportion, and obtaining the black phosphorus-activated graphene composite material loaded noble metal particles. The electrochemical activity, the utilization rate and the stability of a noble metal catalyst are effectively improved.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a high-temperature proton exchange membrane fuel cell cathode catalyst material, in particular to a method for preparing black phosphorus-activated graphene composite material loaded noble metal nanoparticles. Background technique [0002] Compared with low-temperature proton exchange membrane fuel cells that work at 60°C-80°C, phosphoric acid-doped PBI-based high-temperature proton exchange membrane fuel cells (HT-PEMFC) generally work at 160°C-180°C, with electrode reaction kinetics Fast, strong carbon monoxide resistance, simple water and heat management and other advantages, it has broad application prospects in the fields of military special power supplies, portable power supplies, fixed power stations and auxiliary power supplies. However, the commonly used catalysts for HT-PEMFC cathodes are carbon-supported platinum or carbon-supported platinum alloys, which have the proble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/925B82Y40/00B82Y30/00H01M2004/8689Y02E60/50
Inventor 邓呈维王啸姬峰罗若尹顾伟伟杜玮王涛
Owner SHANGHAI INST OF SPACE POWER SOURCES
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