LAUSR

Electrocatalytic nitrate reduction to ammonia (NRA) shows great potential to simultaneously realize sustainable NH3 production and NO3- pollutant elimination. Herein, Mo2C, a typical transition metal carbide, is first demonstrated to be an efficient and durable NRA catalyst. The developed Mo2C nanoparticles anchored on reduced graphene oxide (Mo2C/RGO) show a maximum NH3-faradaic efficiency of 85.2% with a corresponding NH3 yield of 4.8 mg h-1 cm-2. Theoretical computations reveal that surface-terminated Mo sites of Mo2C can selectively absorb NO3- and effectively boost the NRA process through a NOH hydrogenation pathway.