Dataset title: Data of tuning NiCo2O4 bifunctionality with nitrogen-doped graphene nanoribbons in oxygen electrocatalysis for zinc-air battery application Leticia S. Bezerra, Marek Mooste, Guilherme V. Fortunato, Eduardo S. F. Cardoso, Marcos R. V. Lanza, Kaido Tammeveski, Gilberto Maia Contact information: Marek Mooste (marek.mooste@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 "Tuning NiCo2O4 bifunctionality with nitrogen-doped graphene nanoribbons in oxygen electrocatalysis for zinc-air battery application" Journal of Electroanalytical Chemistry 928 117000 (https://doi.org/10.1016/j.jelechem.2022.117000) The electrochemical characterisation data, which was measured in University of Tartu Institute of Chemistry, is for Figures 6, 7, S17 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. An in-house built device was used to study the catalysts performance and stability in Zn-air battery conditions. For Figure 6a electrochemical data, the applied currents have been converted from current (A) to current densities (mA/cm2). For Figures 6b, 7, and S17 electrochemial data, the time (s) has been converted to time (h). 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 authors are grateful to the LCE/DEMa/UFSCar for their support in the conduct of TEM and XRD analyses, and to the LAMAS – Laboratório Multiusuário de Análise de Superfícies at UFRGS, for providing the XPS facilities. The authors gratefully acknowledge the financial support provided by the following Brazilian research funding agencies: the National Council for Scientific and Technological Development - CNPq (grants #303759/2014-3, #303351/2018-7, #405742/2018-5, #465571/2014-0 and #303943/2021-1), São Paulo Research Foundation (FAPESP – grants 2014/50945-4, #2017/23464-3, #2017/10118-0 and #2019/04421-7), Fundect-MS (grant #71/027.195/2022 and #71/039.199/2022), CAPES-PRINT (grant 88881.311799/2018-01), and the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES – Finance Code 001). L.S.B. and E.S.F.C are grateful to CAPES for the individual fellowship granted in support of their research. This study was financially supported also by the Estonian Research Council (grant PRG723) and by the EU through the European Regional Development Fund (TK141, “Advanced materials and high-technology devices for energy recuperation systems”).