▎ 摘　　要

NOVELTY - Preparing graphene modified nickel-iron oxyhydroxide electrode comprises e.g. (i) coating ethanol solution of graphene oxide on conductive glass by spin coating method to obtain graphene oxide electrode, (ii) placing graphene oxide electrode under nitrogen atmosphere to obtain reduced graphene electrode, and (iii) taking graphene electrode as working electrode, platinum plate as counter electrode, and saturated calomel electrode as reference electrode to form three-electrode system, then removing working electrode, washing, and drying. USE - The reduced graphene modified nickel-iron oxyhydroxide electrode is useful in electrocatalytic oxygen evolution reaction (claimed). ADVANTAGE - The method improves conductivity of nickel iron oxyhydroxide, increases specific surface area of electrode, reactive sites, and promotes electrocatalytic oxygen evolution reaction. DETAILED DESCRIPTION - Preparing graphene modified nickel-iron oxyhydroxide electrode comprises (i) coating ethanol solution of graphene oxide on conductive glass by spin coating method to obtain graphene oxide electrode, (ii) placing graphene oxide electrode under nitrogen atmosphere, raising temperature at 450-550 degrees C, maintaining for 2-3 hours, cooling to room temperature to obtain reduced graphene electrode, and (iii) taking graphene electrode as working electrode, platinum plate as counter electrode, and saturated calomel electrode as reference electrode to form three-electrode system, then taking 3-7 mmol/l ferric chloride, 1-5 mmol/l nickel chloride, 4.5-5.5 mmol/l sodium fluoride, 0.08-0.12 mol/l potassium chloride and 0.98-1.02 mol/l hydrogen peroxide solution as electrolyte, measuring cyclic voltammetry from -0.5 plus minus 0.05 V to 0.45 plus minus 0.05 V vs. SCE cycle of potential sweep circle, then removing working electrode, washing, and drying. An INDEPENDENT CLAIM is also included for reduced graphene modified nickel-iron oxyhydroxide electrode obtained by above method.