▎ 摘　　要

A novel method to produce reductive graphene oxide (RGO) with FeI2/Ni2+ applied as reductive agent was reported. This method provides a cheap, effective and environmentally friendly route for the large-scale production of RGO without losing its high conductivity and catalytic activity. An extremely high conductivity of 30231 S/m was obtained affer the optimized FeI2/Ni(NO3)(2) solution treatment. The enhancement of bulk conductivity was clue to the promotion of the nucleophilic substitution reaction induced by Fe2+ (a strong Lewis acid). Ni2+ was introduced to optimize the reductive process by reducing the concentration of hydrogen ions, which would inhibit the hydrolysis of Fe2+. Furthermore, a high cathodic peak current density was observed when applying the free-standing RGO paper as counter electrode in I-/I3- electrolyte system, indicating the high catalytic performance of the RGO paper and providing electron transporting pathway. These outstanding features exhibit a promising prospect of application in solar cells.