Efficient electrocatalytic oxygen evolution by nano NiO-In<sub>2</sub>O<sub>3</sub> electrode materials
Creators: name: Ali, Asghar
name: Zubair, Muhammad
name: Khan, Muhammad Shahzeb
name: Ehsan, Muhammad Ali
name: Habib, Amir
name: Iqbal, Naseer
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biophysics
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified

description: An effective low-cost nano NiO-In<sub>2</sub>O<sub>3</sub> electrode material for oxygen evolution (OER) is presented. Electrochemical studies uncovered electrocatalytic recital in Ascorbic Acid, Hydrogen Peroxide (H<sub>2</sub>O<sub>2</sub>), and ethanol. The cubic crystal structure of NiO-In<sub>2</sub>O<sub>3</sub> was revealed by XRD. FT-IR, FE-SEM and HR-TEM studies exploit the structure and morphology of NiO-In<sub>2</sub>O<sub>3</sub>. Electrochemistry of NiO-In<sub>2</sub>O<sub>3</sub> uncovered high current density (900mA/cm<sup>2</sup>) at substantially low overpotential (230mV), realizing its OER recital. On top, high mass activity and turnover frequency by NiO-In<sub>2</sub>O<sub>3</sub> comprehend improved electrical and semiconductive properties in H<sub>2</sub>O<sub>2</sub>. The NiO-In<sub>2</sub>O<sub>3</sub> durability beyond 90 hours was estimated by chronopotentiometry (CP). The Impedance analysis (EIS) revealed low charge transfer resistance and high exchange current density. Given electrocatalytic studies, we found a direct relationship between NiO-In<sub>2</sub>O<sub>3</sub> nanocomposite and the degradation of H<sub>2</sub>O<sub>2</sub> compared to its counterparts. Hence, this strategy can be an alternative and potential source of hydrogen and oxygen production at commercial scale. <b>Highlights</b>A facile and effectual low-cost NiO-In<sub>2</sub>O<sub>3</sub> electrocatalyst is developed for efficient OER in aqueous hydrogen peroxide.NiO-In<sub>2</sub>O<sub>3</sub> nanocomposite showed high current density (900mA/cm<sup>2</sup>) at low overpotential grasping its oxygen evolution reaction (OER) concert.NiO-In<sub>2</sub>O<sub>3</sub> Impedance analysis revealed its low charge transfer resistance, high exchange current density (<i>J</i><sub>exc.</sub>), high mass Activity, and high turnover frequency (TOF) in hydrogen peroxide, advocating enhanced electrical and semiconductive properties.NiO-In<sub>2</sub>O<sub>3</sub> showed long-term durability (&gt;90 h) at varying current densities, fostering its application as a potential electrocatalyst for OER/HER reactions. A facile and effectual low-cost NiO-In<sub>2</sub>O<sub>3</sub> electrocatalyst is developed for efficient OER in aqueous hydrogen peroxide. NiO-In<sub>2</sub>O<sub>3</sub> nanocomposite showed high current density (900mA/cm<sup>2</sup>) at low overpotential grasping its oxygen evolution reaction (OER) concert. NiO-In<sub>2</sub>O<sub>3</sub> Impedance analysis revealed its low charge transfer resistance, high exchange current density (<i>J</i><sub>exc.</sub>), high mass Activity, and high turnover frequency (TOF) in hydrogen peroxide, advocating enhanced electrical and semiconductive properties. NiO-In<sub>2</sub>O<sub>3</sub> showed long-term durability (&gt;90 h) at varying current densities, fostering its application as a potential electrocatalyst for OER/HER reactions.