▎ 摘　　要

NOVELTY - Preparing self-supporting flexible electrochemical sensor electrode material involves growing nano-spherical cobalt tetraoxide with diameter of about 150 nanometer (nm) on the nitrogen-sulfur co-doped-reducing oxidized graphene-carbon nano-tube (NS-rGO-CNT) film to form a self-supporting flexible electrode material, placing hexadecyl trimethyl ammonium bromide, glutamic acid and cobalt nitrate mixed solution and self-supporting flexible composite film NS-rGO-CNT in the reaction vessel for hydrothermal reaction, cooling naturally to room temperature, centrifuging and separating, washing the dried product, obtaining the supported flexible electrochemical sensor electrode material cobalt tetraoxide/NS-rGO-CNT, where the mass volume concentration ratio of cetyltrimethylammonium bromide, glutamic acid and cobalt nitrate is 1:0.6:1.2-3.6 when preparing cobalt tetraoxide/NS-rGO CNT by hydrothermal method, and the reaction time is 4-10 hours, and the reaction temperature is 140-200℃. USE - Method for preparing self-supporting flexible electrochemical sensor electrode material is used for live cell release of hydrogen peroxide in real time detection (claimed) used in the field of clinical diagnosis and wearable. ADVANTAGE - The self-supporting flexible electrochemical sensor electrode material has good response to hydrogen peroxide, the detection limit is low to 16.7 nmol.L-1, the detection range is wide to 50 nmol×L-1to 10 mmol×L-1, the sensitivity is as high as 10053.1 μA.mmol-1.cm2, and has strong anti-interference ability, good stability, reproducibility and repeatability, and excellent anti-deformation ability. The electrode material has good application in the field of clinical diagnosis and wearable. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an application of self-supporting flexible electrochemical sensor electrode material, which is used for live cell release of hydrogen peroxide in real time detection, where electrode material has good response to hydrogen peroxide, the detection limit is low to 16.7 nanomoles/liter (nmol.L-1), the detection range is wide to 50 nanomoles/liter (nmol×L-1) to 10 millimoles/liter (mmol×L-1), the sensitivity is as high as 10053.1 μA.mmol-1.cm2, and has strong anti-interference ability, good stability, reproducibility and repeatability, and excellent anti-deformation ability.