▎ 摘　　要

NOVELTY - Laser-reduced graphene oxide electrochemical electrode, comprises laser-reduced graphene oxide and cuprous oxide electrodeposited on the surface of the laser-reduced graphene oxide. USE - The Laser-reduced graphene oxide electrochemical electrode is useful in laser-reduced graphene oxide device as an electrochemical sensor for detecting hydrogen peroxide and cholesterol (all claimed). ADVANTAGE - The laser-reduced graphene oxide electrochemical electrode has large specific surface area, high conductivity, wide detection range, high detection sensitivity and low cost. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: 1. preparing laser-reduced graphene oxide electrochemical electrode. The method utilizes solution containing electrolyte and copper salt; and 2. laser-reduced graphene oxide device.