Dataset title: Data of oxygen reduction reaction on Ag nanocatalysts prepared by the microemulsion method Authors: Jonas Mart Linge, Heiki Erikson, Jekaterina Kozlova, Kaupo Kukli, 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 Ag nanocatalysts prepared by the microemulsion method" Electrochimica Acta 507 (2024) 145098, DOI: 10.1016/j.electacta.2024.145098 This dataset contains data for Figures 2-4 and 6. The data was collected using Autolab potentiostat/galvanostat PGSTAT30 controlled with General Purpose Electrochemical System (GPES version 4.9.007) software (Figures 2-4) and Nova (version 2.1.4). The measured currents (in A) have been converted to current densities (mA/cm2, that is multiplied by 1000 and divided by 0.2 cm2). Catalyst nomenclature is as in the paper. 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: The present work was financially supported by the Estonian Research Council (grants PRG723 and PRG753). This work was also supported by the Estonian Ministry of Education and Research (TK210, Centre of Excellence in Sustainable Green Hydrogen and Energy Technologies).