▎ 摘　　要

Fuel cells have described their potential applications for novel-generation energy storage/conversion devices. Herein, an original 3D Au/reduced graphene oxide(RGO)@Polyimide(PI) foam (denoted as 3D ARP) electrode was constructed via a facile reduced graphene oxide and metal Au simultaneous in situ reduction and self assembling process on the PI foam. The PI foam support material, modified with RGO nanosheets and well dispersed Au nanoparticles, exhibits distinctive structural, ensuring a significant promotion towards hydrogen peroxide (H2O2) electroreduction under acid conditions. Such an open 3D hierarchical structures may provide a number of exposed catalytic activity sites and generate interconnected channels between solid and liquid interface for highly efficient mass transport. The electroactivity of 3D ARP electrode was systemically investigated by linear sweep voltammetry (LSV), cyclic voltammetry (CV) and chronoamperometry (CA) measurements. Results indicate that the as-developed electrode presented an impressive electrocatalytic behavior. As expected, the 3D ARP electrode displayed an optimized reduction current density in acid media (880 mA cm(-2) at 0.2 V). What's more, the obtained 3D ARP electrode still represented robust stability, a small apparent activation energy value (11.442 kJ mol(-1)), good reproducibility and repeatability (840 mA cm-2 after 1000 cycles with a 0.0053% current density decay per cycle at 0.2 V). Such an original catalytic electrode might be an alternative for novel energy transformation systems.