MANUFACTURING METHOD FOR CATALYTIC EFFECTIVE LAYER OF GAS-DIFFUSION ELECTRODE Russian patent published in 2008 - IPC H01M4/96 

FIELD: electricity.

SUBSTANCE: manufacturing method for catalytic effective layer (CEL) of gas-diffusion electrode includes creation of platinum catalyst on carbon carrier, preparation of catalyst suspension, applying suspension on base material of gas-diffusion electrode and subsequent drying. At that, platinum catalyst on carbon carrier is created by graphite treatment with azotic acid with creation of graphite nitrate which after that is treated with hexachloroplatinum acid, and obtained compound of platinum penetration into graphite is subjected to deoxidisation in hydrogen flow at temperature of 150÷300°C with obtaining of cellular graphite with nanoclasters of platinum, and catalyst suspension is prepared by saturation of cellular graphite with platinum nanoclasters with aqua-alcoholic solution under ultrasonic dispersion. During ultrasonic dispersion, vibrations with frequency of 100÷150 MHz at power of 3 W and frequency of 20÷40 MHz at power of 1 kW can be applied. Dispersion of polytetrafluoroethylene and proton-conductive polymers can be added to catalyst suspension.

EFFECT: increase of catalytic activity of catalytically effective layer of gas-diffusion electrode for fuel cells.

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