▎ 摘　　要

NOVELTY - Graphene-nickel-iron based hydrotalcite bifunctional oxygen catalyst, is claimed. The catalyst based micelles is a template. The reaction is carrying out under hydrothermal conditions i.e. assembling nickel-iron hydrotalcite on graphene oxide to form graphene oxide-nickel iron hydrotalcite compound, reducing to form graphene-nickel iron hydrotalcite-spherical nano-complex, where the graphene oxide is denoted as GO, graphene as rGO, nickel-iron-based hydrotalcite as LDH, graphene oxide-nickel-iron-based hydrotalcite denoted as GO-LDH, graphene-nickel iron hydrotalcite as rGO-LDH. USE - Used as graphene-nickel-iron based hydrotalcite bifunctional oxygen catalyst. ADVANTAGE - The method is simple, economical and suitable for large production. DETAILED DESCRIPTION - Graphene-nickel-iron based hydrotalcite bifunctional oxygen catalyst, is claimed. The catalyst based micelles is a template. The reaction is carrying out under hydrothermal conditions i.e. assembling nickel-iron hydrotalcite on graphene oxide to form graphene oxide-nickel iron hydrotalcite compound, reducing to form graphene-nickel iron hydrotalcite-spherical nano-complex, where the graphene oxide is denoted as GO, graphene as rGO, nickel-iron-based hydrotalcite as LDH, graphene oxide-nickel-iron-based hydrotalcite denoted as GO-LDH, graphene-nickel iron hydrotalcite as rGO-LDH. The preparation of graphene-nickel-iron based hydrotalcite bifunctional oxygen catalyst comprises: (i) preparing GO-LDH complex dispersing GO in ethylene glycol to the concentration of 1-1.5 mg/ml, carrying out ultrasonic dispersion for 1 hour, centrifuging at 3000 rotations/minute for 10 minutes, removing non-peeling GO to obtain peeled GO dispersion i.e. 20 ml liquid, adding nickel chloride hexahydrate and ferric chloride hexahydrate to the concentration of metal ions 0.04 M/l, stirring to dissolve completely, adding 0.2-0.6 g sodium dodecyl sulfate slowly, stirring, where the 10 ml contains 0.16 g sodium hydroxide in glycol solution, transferring the mixture to reaction vessel, reacting at 180 degrees C for 24 hours, separating reaction solution by centrifuging, washing with deionized water and ethanol three times, drying to obtain GO-LDH complex; and (ii) preparing rGO-LDH oxygen catalyst by dispersing step (i) GO-LDH complex in an aqueous solution to the concentration of 1 mg/ml, pipetting 100 ml of the solution, adding 50 mu l hydrazine hydrate (35%) and 350 mu l aqueous solution of ammonium chloride (27%), stirring in the reactor, allowing to react at 180 degrees C for 1 hours, centrifuging the resulting solid sample, washing three times with deionized water and ethanol and drying to obtain the product.