The reductive and adsorption capacity of hierarchically structured carbon films synthesized from glucose on a molten aluminum catalyst under a layer of molten salts and thermally reduced graphene oxide upon their interaction with a sodium permanganate solution in a neutral medium at room temperature has been studied. The data obtained by X-ray photoelectron spectroscopy show that all manganese adsorbed on the surface of all carbon nanomaterials is in a reduced form – most of it is in the form of quadrivalent manganese ions, and about 20% is in the form of trivalent manganese ions, which makes the formed carbon-oxide composites promising materials as cathodes of chemical current sources. Thermally reduced graphene oxide demonstrated the lowest adsorption activity. Hierarchically structured carbon films make it possible to adsorb up to 100 wt % of the original manganese in neutral media, which is much higher than with all known commercial adsorbents.