Ammonia is not only a key-chemical for sustaining global population, but also an intriguing carbon-free energy carrier. Ammonia, however, is the most energy intensive commodity chemical, responsible for 1-2% of energy consumption and CO2 emissions worldwide. The OASYS project aims to develop an innovative paradigm via an electrochemical reactor that incorporates all steps of hydrogen generation/purification from water electrolysis and ammonia synthesis in a single device. This highly efficient and dynamic approach can assist to the decentralisation of ammonia production by coping with intermittent renewable power supply, and thus, enabling its use as an alternative and sustainable energy vector.