Ammonia (NH3) has long been recognized for its role as a crucial fertilizer in agriculture, but in recent times, it has emerged as a potential clean energy carrier due to its favorable characteristics such as high energy density and ease of liquefaction compared to hydrogen. With the global focus shifting towards decarbonization and achieving carbon neutrality by 2050, there is a growing interest in utilizing ammonia as a renewable energy source. While most current NH3 production methods heavily rely on fossil fuels, efforts are being made to develop more sustainable approaches like blue NH3 (with carbon capture and storage) and green NH3 (produced from zero-carbon processes using renewable energy). Various studies have underscored the importance of transitioning to blue and green NH3 in the medium to long term to reduce greenhouse gas emissions and combat global warming effectively. The research also delves into the synthesis process of NH3, emphasizing the significance of Ru-based catalysts in driving the Haber-Bosch reaction at lower temperatures and pressures. By optimizing catalyst formulations and developing catalysts that exhibit high reactivity and stability under milder conditions, NH3 synthesis efficiency can be enhanced while reducing costs. Additionally, there is a growing interest in exploring smaller-scale green NH3 synthesis plants, especially in regions with limited renewable energy resources, despite the challenges of higher costs. The potential of Ru-based catalysts in maintaining high reactivity and stability for NH3 synthesis, even at industrial scales, offers promising prospects for the future of sustainable ammonia production.