Investigating the properties of perovskite oxide based electrocatalysts for oxygen evolution reaction (OER)

Developing an efficient electrocatalyst for water splitting is imperative to improve the slow OER and store electrical energy as H₂ fuel. Creating an inexpensive development process for an effective OER electrocatalyst with features like a lot of active sites, a huge surface area (SA) and remarkable stability is vital for producing more H₂ and making it more widely available. We created the CoTiO₃/rGO nanocomposite using hydrothermal method in basic solution to improve OER kinetics. The morphological structure of the CoTiO₃/rGO was varied, showing CoTiO₃ nanoparticles anchored on rGO nanosheets to increase the electrolyte ions’ SA for adsorption. The CoTiO₃/rGO electrocatalyst performs better than CoTiO₃, as shown by its remarkable 38 h durability and overpotential (185 mV) at 10 mA/cm². Additionally, compared to CoTiO₃ (56 mV/dec), the CoTiO₃/rGO nanocomposite has a decreased Tafel slope (35 mV/dec). The larger SA and active site of the nanocomposite enhaned electrochemical characteristics of CoTiO₃/rGO nanocomposite. The combination of a metal oxide with material produced from carbon offers a promising first step toward making an exceptional electrocatalyst for use in water electrochemistry.