We report the synthesis of nanostructured Fe3S4 from deep eutectic solvents via a one-step solvothermal method. The as-obtained Fe3S4 catalyst was capable of electrochemically reducing N2 to NH3 under ambient conditions, and exhibits a high NH3 yield (75.4 μg h-1 mg-1cat.) and faradaic efficiency (6.45%) at -0.4 V vs. a reversible hydrogen electrode.
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