▎ 摘　　要

NOVELTY - Preparing graphene-loaded ferrous sulfide nano powder comprises (i) adding iron source reagent to the alkaline aqueous solution to obtain pre-reaction liquid, heating the pre-reaction liquid in the electric blast drying oven, cooling naturally to room temperature, collecting by centrifugation, and freeze-drying to obtain iron oxide nano powder, and (ii) taking ferric oxide nano powder and self-made graphene oxide in absolute ethanol solvent, adding sulfurizing agent to obtain the reaction solution, heating the reaction solution, cooling to room temperature, and collecting by centrifugation to obtain graphene-loaded ferrous sulfide nano powder. USE - The method is useful for preparing graphene-loaded ferrous sulfide nano powder. ADVANTAGE - The nano powder: exhibits extremely high yield and Faraday efficiency in the field of electrocatalytic nitrogen reduction; catalyst showed excellent activity in the field of electrocatalytic nitrogen reduction; and ensures ammonia production rate at 0.2 V (relative to standard hydrogen electrode) was as high as 86.9 g/h/mg cat, and Faraday efficiency of 5.3%. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use of graphene-loaded ferrous sulfide nano powder in electrocatalytic nitrogen reduction, comprising using three-electrode system for testing, carrying out electrocatalytic nitrogen reduction performance test on an electrochemical workstation, using carbon paper coated with graphene loaded ferrous sulfide nanopowder as working electrode, carbon rod as counter electrode, and silver/silver chloride electrode as reference electrode, 0.1 mol/l hydrochloric acid solution as electrolyte, H-type glass electrolytic cell as electrolysis reaction device, and Nafion membrane (117) to separate anode compartment and cathode compartment.