Dataset title: Data of catalyzing oxygen reduction by morphologically engineered ZIF-derived carbon composite catalysts in dual-chamber microbial fuel cells Kumar, Rohit Mooste, Marek Ahmed, Zubair Zekker, Ivar Kaarik, Maike Marandi, Margus Leis, Jaan Kikas, Arvo Otsus, Markus Treshchalov, Alexey Aruväli, Jaan Jaagura, Madis Kisand, Vambola Tamm, Aile Tammeveski, Kaido Contact information: Rohit Kumar (rohit.kumar@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 pulbished paper "Catalyzing oxygen reduction by morphologically engineered ZIF-derived carbon composite catalysts in dual-chamber microbial fuel cells " Journal of Environmental Chemical Engineering 12 112242 (https://doi.org/10.1016/j.jece.2024.112242) The electrochemical characterisation data, which was measured in University of Tartu Institute of Chemistry, is for Figures 4, 5, 6, S7, S8, and S9 and the nomenclature of the catalysts is the same as in the mentioned article. Data was collected using Autolab potentiostat/galvanostat PGSTAT30 (Metrohm Autolab, The Netherlands) controlled with NOVA version 2.1.4 software. The working electrode was glassy carbon electrode with diameter of 5 mm. For Figures 4, 5, S7 electrochemical data the measured currents have been converted from current (A) to current densities (mA/cm2) and electrode potential has been converted from vs. SCE(V) to vs. RHE(V). For Figure 6 data the measured currents have been converted from current (A) to current densities (mA/cm2). For Figures 4b, 4c, S7a and S7c 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: The present work was financially supported by the Estonian Research Council (grants PRG723, PRG4, SJD67 and PRG1509). This research was also supported by the EU through the European Regional Development Fund (TK141, “Advanced materials and high-technology devices for energy recuperation systems”; TK134, “Emerging orders in quantum and nanomaterials”, and TK143, "Molecular cell engineering") and European Commission (S006, “Improving quality of BSR waters by advanced treatment processes”, CELSA project “AnaCat”, CA20101, CA20127, CA20138). The authors would like to thank Dr. Sovik Das from Indian Institute of Technology (IIT) Delhi for his valuable guidance for initializing the bacterial enrichment experiments and Hans Priks from Institute of Technology, University of Tartu for providing the cells