This result reveals that plasma power has less significant role in ammonia production from N2/sea water vapor system than that of the catalyst, which played an important factor to secure a desirable ammonia synthesis rate. This also show experimentally the importance of the plasma-catalyst synergism when employing sea water vapor as hydrogen feedstock. These primary observations reveal novel directions for future work on optimizations of scalable ammonia production from cheap and widely available sources of "gold hydrogen" such as sea water. Moreover, the increment in the N2 input flowrates above 6.1 sccm such as 12.5 and 25.0 sccm resulted in the subsequent decline of the ammonia synthesis rate (𝑟 𝑁𝐻 3 ) produced from N2 and sea water vapor. Similarly, the ammonia synthesis rate (𝑟 𝑁𝐻 3 ) produced from the N2/H2 system also reduced with the increase in the N2 input flowrate (Fig. ). Moreover, we observed that the ammonia synthesis rate produced from the N2/sea water vapor system was in range of that obtained over the N2/pure water vapor system (Fig. ) at similar testing conditions and catalysts. As an example, the maximum ammonia synthesis rate with Co/SiO2 for pure water vapor was 3.9 mmol.gcat -1 .h -1 compared to the value obtained for the same catalyst with sea water vapor of 3.7 mmol.gcat -1 .h -1 at a N2 flow rate of 6.1 sccm and 2 W. The potential to use seawater instead of pure water is advantageous in a commercial process because of its wide availability. Such observations prove a great potential for further optimization of ammonia production process from N2 and sea water for industrial scale.