Currently, the most commonly-used technology for ammonia production is the Haber-Bosch (H-B) process, which requires high energy input and emits greenhouse gas largely to achieve its harsh operating conditions i.e., high reaction temperature (400 -500 o C) and high pressure (150 -300 atm) . Such large intrinsic carbon footprint technology for ammonia synthesis secures a long-standing need for the development of alternative processes that operate under milder conditions such as low temperature, atmospheric pressure, and even more preferably, with zero carbon emissions. A possible solution to fulfill this goal is the use of regionalized synthesis processes powered by renewable energy resources, which can even exploit benefits from local resources, particularly in remote areas. Another challenge of the current ammonia synthesis is the use of "expensive" feed i.e., hydrogen. While hydrogen is considered a "green fuel" to replace fossil fuels, the use of such a valuable chemical as a feedstock for ammonia production is uneconomical. More importantly, the energy cost of hydrogen production originates from the energy-intensive methane reforming process operated at high temperature i.e., 800-1000 o C . The produced hydrogen also needs to be stored and transported, posing safety concerns, and high downstream costs . Therefore, alternative sustainable pathways for ammonia production will draw important attention from researchers and industries. The use of H2O as a hydrogen source in the synthesis of ammonia is one of the most promising approaches when employing non-thermal plasma (NTP) in a sustainable and economical way. Nonetheless, most of the studies on the production of ammonia from N2 and H2O have been focused on photochemical, electrochemical routes, or hybrid plasma-activated electrolysis . These processes are reported to operate under mild conditions. Despite the N2 reduction determining the final ammonia synthesis yield there is an important competition with the hydrogen evolution reactions from such electrochemical-based processes, which are challenging to control . In addition, the electron energy transferred to N2 molecules in these two processes is insufficient to dissociate its high bonding energy (NN, 9.8 eV), and thereby, the resultant ammonia production rate is relatively low . Electrochemical process for hydrogen production from water splitting is currently far from industrial application because of technical problems associated with electrode stability and electrolyser design/scaleup . Hybrid plasma-electrochemical systems reducing N2 with water show high potential for scale-up with high ammonia yield . Nevertheless, such systems are complicated and require high capital investment to obtain a desirable high ammonia synthesis yield. In comparison to the mentioned processes, non-thermal plasma with highly energetic electrons, and in the presence of a catalyst i.e., plasma catalytic system can result in the activation of the highly stable N2 molecules into more reactive, vibrationally or electronically excited states, enabling thermodynamically unfavourable reactions to occur at ambient conditions on selected catalytic surfaces . Moreover, dielectric barrier discharge (DBD) plasma reactors can be straightforward turned on/off suitable for storing intermittent energy . This added to their conceptualization as modular small-scale systems for ammonia synthesis results in simple lightweight units compared to high pressure thermal reactors, which comprise added complex insulation/cooling systems . Indeed, our group has studied ammonia synthesis over NTP catalytic processes over the past years . The achieved fundamental understanding on the effects of different catalysts, plasma-catalyst synergisms, and energy efficiency on ammonia synthesis allow us to primarily estimate the great potential of ammonia synthesis from N2 and "green" H2 sources, which is an important step to achieve zero-carbon ammonia synthesis. Zhang and co-workers have pioneer the substitution of H2 by water for plasma-assisted ammonia synthesis over a notable supported Ru catalyst and obtain an ammonia synthesis rate of around 2.7 mmol.gcat -1 .h -1 . However, much needs to be done in this respect, especially when exploring less costing materials that can show enhanced behaviour in plasma environments. The potential implementation of non-thermal plasma technology will not be feasible until there is a competitive plasma catalytic system in terms of material selection and reactor design. New approaches are needed for intelligent design of catalytic materials and the chosen materials must pair well with efficient plasma reactors. As a choice of catalytic materials, solid oxides are robust, efficient and low-cost materials for catalytic applications.