Method for plasma-assisted sulfur and nitrogen doping of large-area NiFe-LDH catalytic electrode net and plasma discharge device

The invention discloses a method for doping sulfur and nitrogen in a large-area NiFe-LDH catalytic electrode net under the assistance of plasma and a plasma discharge device, the device generates low-temperature plasma through low-pressure glow discharge, a discharge coil is changed from a winding type to a disc type, and a uniform region rich in high-energy electrons and free radicals can be formed on the surface layer of the discharge coil; the area of the area can be changed according to the size of a coil panel, the area is suitable for modification of catalyst pole nets with different areas, and axial distribution of high-energy electrons in a discharge cavity is determined by combining a plasma diagnosis technology, so that an effective modification area is determined. The specific surface area is increased, more active sites are exposed, and the catalytic activity is enhanced. The method has the advantages of low raw material consumption, simple preparation process and short reaction time, large-area c