▎ 摘　　要

SnO2/GO (GO is graphene oxide) composite films with GO mass fraction w(c) ranging from 0.01 to 80% have been prepared using colloidal solutions. Heat treatment of SnO2/GO films in Ar atmosphere at 400 degrees C leads to GO reduction accompanied by partial exfoliation and decreasing of the particle thickness. SnO2/rGO (rGO is reduced GO) film electrodes demonstrate a high electrocatalytic activity in the anodic oxidation of inorganic (iodide-, chloride-, sulfite-anions) and organic (ascorbic acid) substances. The increase of the anodic current in these reactions is characterized by overpotential inherent to the individual rGO films and exchange current density grows linearly with rGO concentration at w(c)