▎ 摘　　要

NOVELTY - A monoatomic lanthanum-loaded nitrogen-doped graphene two-dimensional material is prepared by ultrasonically dispersing graphene oxide and nitrogen source in the solvent to obtain dispersion, drying to obtain mixture, calcining under the protection of inert gas, obtaining nitrogen-doped graphene, ultrasonically dispersing nitrogen-doped graphene in deionized water to obtain nitrogen-doped graphene suspension, dissolving lanthanum source to obtain metallic lanthanum containing aqueous solution, adding dropwise to the nitrogen-doped graphene suspension, stirring, heating and reacting, and calcining under the protection of inert gas. USE - The method for preparing monoatomic lanthanum-loaded nitrogen-doped graphene two-dimensional material used for oxygen reduction reaction or assembled into metal-air battery for energy storage and conversion field (claimed). ADVANTAGE - The method enables preparing the single-atom lanthanum-loaded nitrogen-doped graphene two-dimensional material in an effective manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the application of monoatomic lanthanum-loaded nitrogen-doped graphene two-dimensional material comprising taking 1:2:7 material ratio of Nafion (RTM: perfluoro-sulfonic acid polymer) resin, water and isopropanol to obtain mixed solution, adding lanthanum loaded nitrogen-doped graphene two-dimensional material, ultrasonically dispersing to obtain coating slurry, coating onto glassy carbon electrode, and drying to obtain electrocatalytic material for oxygen reduction reaction or zinc-air battery anode material.