Dataset title: Oxygen reduction reaction on Pd nanocatalysts prepared by plasma-assisted synthesis on different carbon nanomaterials Madis Lüsi, Heiki Erikson, Alexey Treshchalov, Mihkel Rähn, Maido Merisalu, Arvo Kikas, Vambola Kisand, Väino Sammelselg and Kaido Tammeveski Contact information: Heiki Erikson (heiki.erikson@ut.ee), Kaido Tammeveski (kaido.tammeveski@ut.ee) Institute of Chemistry University of Tartu Ravila 14a 50411 Tartu Estonia This dataset contains the data presented in the figures of published paper "Oxygen reduction reaction on Pd nanocatalysts prepared by plasma-assisted synthesis on different carbon nanomaterials" Nanotechnology 32 035401 (https://doi.org/10.1088/1361-6528/abbd6f) The data is for Figure 5a, Figure 5b, Figure 6a and Figure 7a and the nomenclature of the catalysts is the same as in the paper mentioned previously. Data was collected using Autolab potentiostat/galvanostat PGSTAT30 (Metrohm Autolab, The Netherlands) controlled with General Purpose Electrochemical System (GPES version 4.9.007) software. The working electrode was glassy carbon electrode with diameter of 5 mm. For all supplied electrochemical data the measured currents have been converted from current (A) to current densities (mA/cm2, that is multiplied by 1000 and divided by 0.2 cm2). For Figure 6a and Figure 7a, the background currents, measured in Ar-saturated solution, have been subtracted, in addition to conversion to current densities. Licence: This dataset is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. Funding: This work was supported by the Estonian Research Council grant PRG723. This research was also supported by the EU through European Regional Development Fund (TK141, ‘Advanced materials and high-technology devices for energy recuperation systems’).