O evolution reaction (OER) has a high overpotential, which can significantly reduce the energy efficiency in H2O decompn. Using urea oxidn. reaction (UOR) to replace OER has been a feasible and energy-saving approach because of its lower electrode potential. Also, UOR is also an important process in wastewater treatment. This paper successfully synthesizes a high-performance bifunctional catalyst for urea electrolysis. The catalyst is Ni nitride bead-like nanospheres array supported on Ni foam (Ni3N/NF). Several characterization methods are used to analyze the catalyst's morphol., structure, and compn. as well as catalytic activity/stability, including x-ray diffraction, SEM, TEM, XPS, and electrochem. methods (cyclic voltammetry, linear sweep voltammetry, electrochem. impedance spectroscopy, and CAM). A concurrent 2-electrode electrolyzer (Ni3N/NF‖Ni3N/NF) is constructed and used to validate the catalyst performance, and the cell achieves 100 mA cm-2 at 1.42 V, while the cell voltage of Pt/C‖IrO2 is 1.60 V, indicating that the Ni3N/NF catalyst is superior to precious metals.applications.materials up to date.