▎ 摘　　要

NOVELTY - Preparing graphene oxide composite nickel-molybdenum-based catalyst doped with trace copper, comprises (i) cutting nickel-molybdenum foam sheet (NMF), placing in 50 ml small beaker, adding 10 ml ethanol solution and 10 mg graphene oxide (GO), ultrasonically processing for 20 minutes, allowing to stand for 30 minutes, taking out GO/NMF and rinsing with water for 3 times; (ii) taking 0.123 g copper sulfate pentahydrate, 2.941 g sodium citrate and 2.641 g L-ascorbic acid into 50 ml small beaker, adding 50 ml pure water to dissolve, placing GO/NMF into solution, allowing to stand and depositing for 1 hour to obtain copper-graphene oxide/nickel-molybdenum foam sheet. USE - The method is useful for preparing graphene oxide composite nickel-molybdenum-based catalyst doped with trace copper. ADVANTAGE - The catalyst has excellent electrocatalysis water decomposition activity, and is prepared by simple and economical process.