▎ 摘　　要

We report the synthesis of lightweight, freestanding Ni-Fe@rGO porous interconnects by carbothermal reduction of Ni-FeOx using graphene oxide (GO) as the reducing agent. Here, we take advantage of the oxygen functionalities present in GO to aid in anchoring the metal ions followed by epoxide -assisted Ni-FeOx@GO network formation. When pyrolyzed under inert conditions, Ni-FeOx@GO networks were converted to Ni-Fe@rGO by simple carbothermal metal reduction at 800 degrees C. The Ni-Fe@ rGO monoliths were found to be macroporous, electrically conducting, and electrocatalytic toward oxygen evolution reaction (OER). The monoliths exhibited excellent OER activity yielding a current density of 10 mA cm(-2) at an overpotential of 350 mV versus RHE, Tafel slope of 38 mV decade(-1), and a TOF value of 50 s(-1) on par with the established Ni-Fe based electrocatalysts.