Ammonia (NH3) has historically been an indispensable chemical, mainly as fertilizer. Recently, it has gained attention as a carbon-free energy carrier. Global ammonia production is dominated by the Haber-Bosch process, which is energy-intensive and generates significant CO2 emissions. To keep global warming below 1.5 °C, as called for in the Paris Agreement, emissions need to be reduced by 45% by 2030 and reach net zero by 2050. As a result, developing a sustainable and efficient pathway for NH3 synthesis is urgent. On the other hand, nitrates pollution in water bodies is a growing global concern. Nitrogen is a crucial element for life, but the intensification of human activities in agriculture leads to water contamination and a decline in water quality.