▎ 摘　　要

Graphene nanosheets loaded with highly dispersed platinum nanoparticles (Pt@GNSs) are prepared by a simple and effective hydrothermal method. The Pt@GNS as an air cathodematerial exhibits a very high initial discharge capacity of 7574 mA h(-1) g(-1) at a current density of 0.1 mA cm(-2) and delivers a stable cycling performance. The electrocatalytic characteristics of Pt on the Na-O-2 cell have been investigated for the first time.