ELECTROCATALYTIC COBALT-VANADIUM COATINGS FOR THE HYDROGEN EVOLUTION REACTION

The study of existing energy-saving materials and obtaining the new ones for reducing cost hydrogen production, is relevant modern energy industry. Such properties can be predicted containing vanadium, molybdenum, tungsten exhibiting catalytic activity evolution reaction Aforementioned metals co-deposited from aqueous solutions with iron subgroup metal-catalysts through formation cluster intermetallic compounds Me-V bond adsorbed on cathode surface. induced co-deposition cobalt vanadium complex citrate electrolyte was investigated in current work. As a result research, it found that uniform microcrystalline light-gray high-quality cobalt-vanadium alloy coating possible to precipitate content 20 g/dm3 (in terms metal) as process carried out at density 5–10 A/dm2, temperature 30–40°С, pH = 2,8–3,2. 0,37–0,53 % by weight. maximum observed densities 8–9 А/dm2. obtained using reduction performed solution 2,5М NaOH + 0,02 M NaCl. By increasing 0,37 0,53% overvoltage reduced 0,5 V. It ion cathodes steel 0.08–0,1 V lower, exchange higher than electrodes made 20, which are used industrial water-alkali electrolysis. This indicates electrocatalytic reaction. Electrodes coating, recommended material electrochemical production. Hydrogen also decrease consumption this 15–20 %.