▎ 摘　　要

Reduced graphene oxide-nanocrystals has attracted considerable attention since it has great potential due to its great chemical activity, high mechanical stability and excellent electrical properties. But the synthesis of reduced graphene oxide-nanocrystals still faces challenges, for example introduce of RGO would contribute to change the morphology of nanocrystals. To address the challenge, we designed a simple method to prepare the common composite material and it was successfully adopted to fabricate glucose sensor with higher catalytic activity. Under the optimal conditions, the experimental results indicated that RGO-Pd NCs@CuO/GC electrode showed excellent electrocatalysis for glucose oxidation with a lower detection limit of 10 nM. This sensor was of excellent stability and sensitivity. This study not only provides a new sensor for selective and reliable detection of glucose but also offers a common and facile strategy for syntheses of nanocrystals supported on reduced graphene oxide. (c) 2019 The Electrochemical Society.