▎ 摘　　要

NOVELTY - One-step preparation of graphene/hydrotalcite nanosheet catalyst involves ultrasonically dispersing graphene oxide in 100 mL mixed solvent comprising formamide-water to obtain a solution with concentration of 0.1-1.0 mg/L, adding ferric nitrate nonahydrate and nickel nitrate hexahydrate in the mol ratio of 1:2, such that the total metal ion concentration is 0.03 mol/L, stirring the contents for 1 hour to completely dissolve, slowly adding 0.7 mol/L sodium hydroxide in formamide-water mixture in drops until the pH is 8.5-9.5, adding the mixture into a reaction kettle, reacting for 6-12 hours at 120-160 degrees C, cooling the mixture, carrying out centrifugal separation at 4000 rpm, and washing the obtained product 3 times using deionized water and ethanol. USE - One-step preparation of graphene/hydrotalcite nanosheet catalyst used for alkaline electrolysis water anodic oxygen evolution reaction and fuel cell cathode oxygen reduction reaction (all claimed). ADVANTAGE - The method eliminates the stripping and reduction of graphene oxide, increases the active sites in the catalyst, inhibits the aggregation of complex graphene and the nanosheet and improves the complex conductivity of the catalyst. The catalyst produced has reduced evolution over potential of oxygen and oxygen reduction reaction in an alkaline medium, reduced electron transfer resistance, and excellent oxygen catalytic performance and stability.