CATHODE MATERIAL BASED ON NANOCRYSTALLINE CEMENTITE, METHOD OF ITS PRODUCTION, CATHODE FOR ELECTROLYTIC OBTAINING OF HYDROGEN FROM WATER ALKALINE AND ACIDIC SOLUTIONS AND METHOD OF ITS MANUFACTURING

摘要

FIELD: chemistry.;SUBSTANCE: group of inventions relates to production of electrodes for electrolytic obtaining of hydrogen from water alkaline and acidic solutions. Method of obtaining nanocrystalline composite material of cathode includes carrying out mechanical activation of mixture of iron and graphite powders in atom ratio 75:25 in argon medium for 15÷20 h with obtaining powder mixture from nano-sized grains of cementite Fe₃C and α-Fe with their ratio in wt %:(90÷95):(10÷5). Method of cathode manufacturing includes preliminary exposure of said.;EFFECT: nanocrystalline composite material in vacuum 5÷10 Pa for 1÷2 h at temperature 450÷550°C, after which its magnetic-impulse pressing is carried out with amplitude 1÷2 GPa and duration of pressure pulses 300÷400 mcs.;EFFECT: manufacturing of cathode with lower overtension of reaction of electrochemical hydrogen release is ensured;5 cl, 1 ex, 5 dwg