Ammonia (NH3) is an essential chemical and a promising fuel, but its industrially produced process is carbon-intensive and highly energy-consuming. Developing a green and sustainable NH3 synthesis route is extremely urgent. Electrochemical ammonia synthesis (EAS) powered by renewable electricity energy under ambient conditions is fascinating, while exploring the efficient electrocatalysts and suitable nitrogen source is critical. Due to the unique characteristics of adjustable porosity and component, large specific surface area and diverse structure, metal-organic frameworks (MOFs) and their v...