▎ 摘　　要

NOVELTY - A composite nano-material is a graphene oxide/silver-gold/cuprous oxide quaternary composite nano-material. The metal particles are uniformly loaded on the cubic cuprous oxide surface. The cuprous oxide is loaded on the graphene oxide wafer. USE - Composite nano-material used in electrochemical detection of hydrogen peroxide content (claimed). ADVANTAGE - The composite nano-material has excellent electrocatalytic performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of composite nano-material, which involves silver-gold/cuprous oxide solid powder, ultrasonically dispersing in deionized water, stirring and mixing uniformly, adding graphene oxide solid powder to deionized water, stirring, ultrasonically dispersing, adding to silver-gold/cuprous oxide solution, stirring, washing the reaction product for several times with deionized water and ethanol, and drying in a vacuum oven; and (2) application of composite nano-material in detection of hydrogen peroxide content.