In our previous work , we identified calcium and magnesium as potential mediators that meet these criteria, alongside lithium. These metals meet all the aforementioned criteria, with their surface nitride vacancies being more stable than bulk nitride vacancies and exhibiting spontaneous nitride formation at room temperature. Calcium (~-2.87 V vs SHE) has already been investigated in previous work, where it demonstrated favorable and stable performance, particularly using calcium perchlorate tetrahydrate and dimethoxy ethane as electrolyte. This system yielded a Faradaic efficiency (FE) of 50% for NH₃ production. Moreover, Fu et al.'s work demonstrated the use of calcium as a mediator for nitrogen reduction in an electrochemical system, achieving a Faradaic efficiency of 40 ± 2%. This was the first study to rigorously verify calcium's ability to mediate ammonia synthesis in a continuous system, providing a critical step toward utilizing earth-abundant elements for decentralized ammonia production under ambient conditions. Preliminary experiments with magnesium were also performed to show its ability as a successful mediator which achieved a FE of 27% . A recent study by Krebz et al. also reported NH₃ production in a Mg-mediated system with an FE of 7% where magnesium nitride was synthesized electrochemically and then immersed in an acidic solution to produce ammonia. They utilized a Cu foil electrode and an electrolyte composed of a mixture of Li and Mg salts, running their experiments at 33°C and 14 bar N2 pressure. The choice of electrolyte and electrode plays a significant role in ammonia synthesis, as it directly impacts the stability of the solid electrolyte interface (SEI). We, on the other hand, specifically selected ethanol (EtOH) as a weak proton donor, which helps reduce the protonation of magnesium, minimizing side reactions and enhancing overall system stability. Our approach, however, involves a more integrated process, synthesizing magnesium nitride and protonating it to form ammonia within the same cell, while simultaneously regenerating the magnesium sites. This simultaneous operation offers potential advantages in simplicity and efficiency for future optimization.