Developing TiCo2O4 spinel based on rGO nanosheet to enhance electrochemical performance of OER activity

•The TiCo2O4/rGO (TCO/rGO) nanocomposite was developed via hydrothermal approach.•The OER activity of the nanohybrid and their counterpart was investigated under 1.0 M KOH.•The TiCo2O4/rGO nanohybrid at 10 mA cm−2 exhibited the 269 mV and 37.56 mV dec-1 Tafel slope.•The incorporation of rGO into TiCo2O4 mitigate the chances of agglomeration that’s enhanced the OER activity. The reduction of fossil fuel reserves and the deterioration of environmental conditions have led to a worldwide concern with producing significant amounts of energy in a sustainable manner. The production of electrocatalysts for the oxygen evolution reaction (OER) is imperative for widespread commercialization of water electrolyzers. The electrocatalysts must exhibit improved electrocatalytic behavior while being cost-effective. This work presents simple hydrothermal route for producing a TiCo2O4 nanostructure with a spherical morphology, which is supported on reduced graphene oxide sheets (rGO). The nanocomposite has been subjected to an investigation of its morphological, structural and electrochemical characteristics. This material exhibits promise for electrochemical water splitting due to its significant electroactive surface area, distinctive morphology and metal ions (M+) synergetic effect on its electrocatalytic performance. The nanostructure of TiCo2O4/rGO-has been observed to exhibit robust electrocatalytic activity, underscoring the significance of the present study. Additionally, presented are the enduring stability of the OER, along with the reduced overpotential (269 mV@10 mA cm−2), decreased Tafel slope (37.56 mV dec-1) with greater electrochemical active surface area. Our finding suggests that the TiCo2O4/rGO nanohybrid exhibited high electrocatalytic efficiency and can be utilized in diverse electrochemical applications.