▎ 摘　　要

NOVELTY - Generating triethanolamine by using two-stage series reaction electro-catalysis reducing carbon dioxide, comprises loading a gas diffusion electrode of 0.5-2 m/cm2copper oxide catalyst into the flow electrolysis cell, carrying out in-situ electroreduction of copper oxide by cyclic voltammetry, where the electrode is treated with hydrophobic, introducing carbon dioxide gas, applying negative voltage to the electrode, selectively reducing carbon dioxide to ethylene, spraying carbon-supported metal phthalocyanine conductive catalyst on the gas diffusion electrode, passing ethylene to the anode side of the secondary reaction electrolytic cell, bringing an electrolyte solution containing bromide ions into contact with the electrodes, applying voltage to the entire electrolytic cell device, and selectively oxidizing ethylene to 2-bromoethanol, reducing nitrite to ammonia, reacting and mixing anode and cathode electrolytes. USE - The method is useful for generating triethanolamine by using two-stage series reaction electro-catalysis reducing carbon dioxide. ADVANTAGE - The method provides a high-efficiency, feasible two-stage series reaction electrocatalysis reducing carbon dioxide to generate triethanolamine with high activity and low cost. The method has wide raw material source, simple preparation method, environment-friendly, low cost, which is good for popularization and application.