▎ 摘　　要

NOVELTY - Preparation of nitrogen-doped carbon dot/graphene oxide nano composite electrocatalyst involves ultrasonically dissolving citric acid, urea and graphene oxide in the mass ratio of 54:18:1 in ultrapure water, uniformly dispersing at 160-200 degrees C, preferably at 180 degrees C, hydrothermally reacting for 10-13 hours, preferably 12 hours, naturally cooling to room temperature after the reaction completion, centrifuging to remove excess citric acid and urea, drying in vacuum at 40-60 degrees C, preferably 50 degrees C for 23-25 hours, preferably 24 hours to remove water. USE - Preparation of nitrogen-doped carbon dot/graphene oxide nano composite electrocatalyst. ADVANTAGE - The method produces electrocatalyst having excellent electrocatalytic performance, large current density, initial potential corrected to 0.13V, excellent electrochemical stability, resistance to methanol and carbon monoxide toxicity, and improved catalytic efficiency.