Publikace na Přírodovědecká fakulta |
2021
Abstrakt
Silver amalgam screen-printed electrodes (AgA-SPEs) were designed, prepared, and tested for the first time as perspective representatives among SPEs for measuring at high negative potentials. The precise coulometric preparation procedure for mercury deposition at the working electrode surface of the commercial silver-SPE was developed.
An optimal electrolyzer construction for the mercury deposition, electrolyte composition, and electrolysis conditions were proposed. The maximum value of hydrogen overvoltage (-1979 mV) was found on AgA-SPE with 50% (w/w) of Hg content in 0.1 mol L-1 NaOH, which is more negative than with the original silver-SPE for 387 mV (-1592 mV).