▎ 摘　　要

A designed rod-shaped CeO2 (NRCeO2) was successfully synthesized using an in situ growth method on graphene sheets (GNs), which act as a spacer to prevent graphene from stacking. When graphene sheets with rod-shaped CeO2 and embellished with Pt nanoparticles are stacked on one another, a three-dimensional (3D) layer-by-layer Pt-NRCeO2/GNs composite structure is created. For the TEM and SEM characterization, the 3D structure has been confirmed. In the electrochemical tests, the as-designed 3D Pt-NRCeO2/GNs catalyst shows the highest ESA value (72.6 m(2) g(-1)) and largest catalytic current density (498 mA mg(-1)) for methanol oxidation compared with other catalysts. Because of the effect of the rodshaped CeO2, which acts as a spacer to prevent graphene stacking, a large amount of Pt particles are exposed to the electrolyte solution. The designed 3D Pt-NRCeO2/GNs composite structure is an efficient method to improve the electrocatalytic performance. (C) 2015 Elsevier Ltd. All rights reserved.