▎ 摘　　要

NOVELTY - Preparing nitrogen-doped porous graphene-supported copper oxide electrode material involves dispersing uniformly graphene oxide, nitrogen-containing precursors and activator in water, drying water, calcining, washing, and drying to obtain nitrogen-doped porous graphene, dispersing uniformly nitrogen-doped porous graphene, copper source and precipitant in the first solvent, performing hydrothermal reaction, washing, and drying to obtain the nitrogen-doped porous graphene-loaded copper oxide electrode material. USE - Method for preparing nitrogen-doped porous graphene-supported copper oxide electrode material used as enzyme-free glucose electrochemical sensor electrode material (claimed). ADVANTAGE - The method enables to prepare electrode material in two steps of high-temperature calcination and hydrothermal, and has cost-effective, excellent chemical properties, simple operation and eco- friendly. The enzyme-free glucose electrochemical sensor has extremely low detection limit, high sensitivity, wide linear range and excellent anti-interference. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. a nitrogen-doped porous graphene-supported copper oxide electrode material is obtained by the preparation method; and 2. a use of nitrogen-doped porous graphene-loaded copper oxide electrode material as an enzyme-free glucose electrochemical sensor electrode material.