To　perform　the　electrochemical　nitrogen　reduction　reaction　(NRR)　under　milder　conditions　for　sustainable　ammonia　production,　electrocatalysts　should　exhibit　high　selectivity,　activity,　and　durability.　However,　the　key　restrictions　are　the　highly　stable　N　N　triple　bond　and　the　competitive　hydrogen　evolution　reaction　(HER),　which　make　it　difficult　to　adsorb　and　activate　N-2　on　the　surface　of　electrocatalysts,　leading　to　a　low　ammonia　yield　and　Faraday　efficiency.　Inspired　by　the　enzymatic　nitrogenase　process　and　using　the　Fe-Mo　as　the　active　center,　here　we　report　supported　Fe2Mo3O8/XC-72　as　an　effective　and　durable　electrocatalyst　for　the　NRR.　Fe2Mo3O8/XC-72　exhibited　NRR　activity　with　an　NH3　yield　of　30.4　mu　g.h(-1).mg(-1)　(-0.3　V)　and　a　Faraday　efficiency　of　8.2%　(-0.3　V).　Theoretical　calculations　demonstrated　that　the　electrocatalytic　nitrogen　fixation　mechanism　involved　the　Fe　atom　in　the　Fe2Mo3O8/XC-72　electrocatalyst　acting　as　the　main　active　site　in　the　enzymatic　pathway　(*NH2　-＞*NH3),　which　activated　nitrogen　molecules　and　promoted　the　NRR　performance.