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Proton exchange membrane fuel cell membrane electrode electrocatalyst and preparation method thereof

A technology for fuel cell membranes and proton exchange membranes, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of electrocatalyst performance degradation, insufficient dispersion, poor electrode performance, etc., and achieve improved utilization, particle size, etc. Small size and good electrochemical reactivity

Inactive Publication Date: 2016-11-23
YIXING SITONG HOUSEHOLD ELECTRICAL APPLIANCE FITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used fuel cell membrane electrode electrocatalysts are Pt / C catalysts, generally using H 2 PtCl 6 Made by direct reduction method, directly use H 2 PtCl 6 When preparing Pt, the reaction time is long, and PtCl 6 -2 It is easy to gather and adsorb on the surface of carbon, and the dispersion of Pt is not high enough, so that the particle size of Pt is too large, up to tens of nanometers, and the distribution is uneven. bad

Method used

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  • Proton exchange membrane fuel cell membrane electrode electrocatalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] Weigh 200mg of graphene oxide powder and place it in 300mL of propylene glycol for ultrasonic vibration to obtain a uniformly mixed graphene oxide alcohol solution; weigh 2mL of 0.05mol / L chloroplatinic acid, place it in 30mL of propylene glycol, stir and mix evenly to obtain chloroplatinic acid Alcohol solution; mix the above two solutions, add 5% NaOH solution under stirring, adjust pH = 10, stir for 30 minutes, put it into a microwave reactor, microwave power 200W, temperature 180°C, heat for 5 minutes, after the reaction is complete, cool to room temperature; the reaction solution was vacuum filtered, the filter cake was washed alternately with absolute ethanol and deionized water, and washed three times respectively until the pH of the filtrate = 7, and then dried in a vacuum oven at 80°C for 3 hours to constant weight to obtain graphite oxide A Pt / graphene electrocatalyst with alkene as a carrier and Pt as an active component, and the mass percentage of Pt is about...

Embodiment 2

[0024] Weigh 200mg of graphene oxide powder and place it in 300mL of propylene glycol for ultrasonic vibration to obtain a uniformly mixed graphene oxide alcohol solution; weigh 3mL of 0.05mol / L chloroplatinic acid, place it in 30mL of propylene glycol, stir and mix evenly to obtain chloroplatinic acid Alcohol solution; mix the above two solutions, add 5% NaOH solution under stirring, adjust pH = 10, stir for 30 minutes, put it into a microwave reactor, microwave power 200W, temperature 180°C, heat for 5 minutes, after the reaction is complete, cool to room temperature; the reaction solution was vacuum filtered, the filter cake was washed alternately with absolute ethanol and deionized water, and washed three times respectively until the pH of the filtrate = 7, and then dried in a vacuum oven at 80°C for 3 hours to constant weight to obtain graphite oxide A Pt / graphene electrocatalyst with alkene as a carrier and Pt as an active component, and the mass percentage of Pt is about...

Embodiment 3

[0026] Weigh 350mg of graphene oxide powder and place it in 400mL of ethylene glycol for ultrasonic vibration to obtain a uniformly mixed graphene oxide alcohol solution; measure 6mL of 0.06mol / L chloroplatinic acid, place it in 20mL of ethylene glycol, and stir evenly Obtain chloroplatinic acid alcohol solution; mix the above two solutions, add 5% KOH solution under stirring, adjust pH = 12, stir for 20 minutes, then put it into a microwave reactor, microwave power 180W, temperature 120°C, heat for 8 minutes, and the reaction is complete , cooled to room temperature; the reaction solution was vacuum filtered, and the filter cake was washed alternately with acetone and deionized water for 5 times until the filtrate pH=7, and then dried in a vacuum oven at 60°C for 5 hours to constant weight to obtain graphene oxide A Pt / graphene nanometer electrocatalyst with Pt as a carrier and an active component; the mass percentage of Pt is about 20%. The particle size of the Pt / graphene e...

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Abstract

The invention discloses a proton exchange membrane fuel cell membrane electrode electrocatalyst and a preparation method thereof. The electrocatalyst is prepared through the method including the steps of adding graphene oxide powder to polyhydric alcohols, conducting ultrasonic dispersing to obtain a graphene oxide alcohol solution, putting a chloroplatinic acid water solution to polyhydric alcohols to obtain a chloroplatinic acid alcohol solution, mixing the prepared graphene oxide alcohol solution and the chloroplatinic acid alcohol solution, adding aqueous alkali to the prepared mixed solution to adjust the pH to be 8-12, transferring the materials into a microwave reaction still, heating the materials to 80-180 DEG C at the microwave power of 180-250 W for reaction for 5-25 min, cooling reaction liquid, conducting vacuum filtering, alternately washing a filter cake with organic solvent and deionized water till the pH of filtrate is neutral, and drying the filter cake till the weight is constant to obtain the Pt / graphene electrocatalyst. The electrocatalyst prevents particle aggregation and is small in granularity, the high-dispersity electrocatalyst is high in catalytic activity, and the utilization rate of the electrocatalyst is increased.

Description

technical field [0001] The invention belongs to the field of fuel cells, and relates to a proton exchange membrane fuel cell membrane electrode electrocatalyst and a preparation method thereof, and relates to a Pt / graphene electrocatalyst and a preparation method thereof. Background technique [0002] Fuel cell is an electrochemical device that directly converts chemical energy in fuel hydrogen into electrical energy. It has high energy density, is environmentally friendly, and has broad development prospects. Commonly used fuel cell membrane electrode electrocatalysts are Pt / C catalysts, generally using H 2 PtCl 6 Made by direct reduction method, directly use H 2 PtCl 6 When preparing Pt, the reaction time is long, and PtCl 6 -2 It is easy to gather and adsorb on the surface of carbon, and the dispersion of Pt is not high enough, so that the particle size of Pt is too large, up to tens of nanometers, and the distribution is uneven. bad. Therefore, new preparation met...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/8825H01M4/926Y02E60/50
Inventor 时尧兴钊文科芮志明
Owner YIXING SITONG HOUSEHOLD ELECTRICAL APPLIANCE FITTINGS
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