The catalytic and electrochemical properties of carbon-supported Pd catalysts (Pd-C, Pd-CNT), prepared by the technique of deposition reduction, are presented in this paper. Single-walled and multiwalled (nitrogen doped, carboxylated, noncarboxylated) carbon nanotubes with different specific surface areas as well as activated carbon (NORIT (R)) were used. Prepared catalysts were evaluated using cyclic voltammetry. Voltammetric characterization of the catalysts evaluated on the basis of nitrobenzene reduction reaction reveals increasing reactivity of catalysts with increasing Pd concentration from 1 up to 5% Pd and decreasing reactivity from 5 to 10% Pd. Influence of support properties on the reactivity of catalyst was also observed. Prepared catalysts were compared with four commercially produced catalysts.