• Sukhyi, Mykhailo
• Polishchuk, Yuliya
• Matveev, Vadim
• Nefedov, Volodymyr

Abstract

<jats:title>Abstract</jats:title><jats:p>The possibility of increasing the hydrogen release rate and reducing energy consumption was analyzed using a system in which the anodic process of metal (aluminum) dissolution occurred on one electrode and the process of H<jats:sub>2</jats:sub> release - on the other (nickel) electrode. The possibility of generating hydrogen with a current density of ~ 400 mA cm<jats:sup>–2</jats:sup> in NaOH solutions with a concentration of 6 ÷ 8 mol L<jats:sup>–1</jats:sup> at a cell voltage of ~ 0.5 V was confirmed. When the electrodes were short-circuited, hydrogen was generated on nickel when aluminum was dissolved at a rate corresponding to current density ~ 100 mA cm<jats:sup>–2</jats:sup>. The possibility of simultaneous hydrogen production and electricity generation in the system under consideration was shown. It was found that the maximum net power was generated in 6 M NaOH. The specific power in such a solution can reach a value of 8 W cm<jats:sup>–2</jats:sup> at a cell voltage of about 0.15 V. In this case, the hydrogen release rate corresponded to a current density of 60 mA cm<jats:sup>–2</jats:sup>.</jats:p>

Topics

• density
• nickel
• aluminium
• Hydrogen
• current density