THE METHODOLOGY OF PREPARING AN ELECTRODE MATERIAL FOR THE APPLICATION IN HER/OER REACTIONS

The subject of the application is the methodology of preparing the electrode material for the application in the HER/OER reactions characterized in that praseodymium(III) nitrate in the amount from 0.08 g to 0.10 g, barium nitrate in the amount from 0.025 g to 0.035 g, strontium nitrate in the amount from 0.015 g to 0.025 g, cobalt(II) nitrate in the amount from 0.085 g to 0.095 g and iron(III) nitrate in the amount from 0.025 g to 0.035 g are mixed and the complexing agent is added in the amount from 20 cm3 to 30 cm3 and mixed with a magnetic stirrer, and next an ammonia solution is added in the amount from 0.4 cm3 to 0.6 cm3 preferably 0.5 cm3 preferably until the pH is from 5.9 to 6.1 most preferably 6 and graphene foams are added in the amount 0.1 g to 0.6 g, and after heating under the neutral gas atmosphere and cooling an inorganic acid is added to the thus prepared mass in the ratio from 5 cm3 to 7 cm3 per 0.5 g of the prepared mass and left in a magnetic stirrer for 10 to 60 min preferably 30 min, and after that it is rinsed with distilled water until the pH of the leachate is neutral, dried, mixed, transferred to a glass or porcelain container, pre-heated at the temperature from 200°C to 300°C preferably at 250°C in the time from 2 to 10 h preferably 5 h under the neutral gas atmosphere and next heated at the temperature from 700°C to 1200°C preferably at 900°C, whereby the complexing agent is composed of ethylenediaminetetraacetic acid (EDTA) in the amount from 0.25 to 0.35 g, citric acid in the amount from 0.30 g do 0.40 g and water preferably distilled water in the amount from 20 cm3 to 30 cm3. Graphene foams are prepared by mixing powdered sea algae in the amount from 0.2 g to 1.2 g, nano flakes of graphene in the amount from 0.2 g to 1.2 g and potassium carbonate in the amount from 2 g to 12 g in water preferably distilled water in the amount from 20 cm3 to 30 cm3, and then placing in an electrical laboratory dryer and drying at the temperature from 90°C to 130°C preferably at 110°C for 10 to 48 h preferably 24 h, and next performing the carbonization process at the temperature from 600°C to 1200°C preferably at 800°C at the heating rate from 5°C/min to 20°C/min preferably 10°C/min and heating for 30 to 120 min preferably 60 min.