▎ 摘　　要

With the rapid economic development and urgent environmental demands, the direct methanol fuel cell (DMFC) as one of environmental-friendly energy-conversion systems has attracted wide attention in the world, while the insufficient activity and low structural stability of the anode Pt/carbon catalyst largely deteriorate its overall performance. Herein, we report a facile and cost-effective bottom-up method to the fabrication of rhodium nanocrystals supported by three-dimensional (3D) porous hybrid networks constructed from low-defect carbon nanotubes and reduced graphene oxide (Rh/LCNT-RGO) as Pt-alternative electrocatalysts for DMFC. Such a structural design gives the resultant Rh/LCNT-RGO hybrid a series of fantastic architectural advantages, such as the large specific surface area of 3D interconnected graphene configuration, high electrical conductivity of low-defect carbon nanotubes, and abundant catalytically active sites of well-dispersive Rh nanocrystals. As a consequence, the Rh/LCNT-RGO hybrid displays unusual catalytic abilities towards the methanol electrooxidation, including a large electrochemically active surface area of 123.8 m(2) g(-1), a high mass activity of 1228.5 mA mg(-1), strong poison tolerance, and long lifespan, far surpassing those of reference Rh/carbon black, Rh/acid-treated CNT, and Rh/RGO catalysts.