Low Temperature Hydrothermal Method for Synthesis of Crystalline Fe₂O₃ and their Oxygen Evolution Performance

Abstract

Abstract Hydrothermal method for the synthesis of hematite (α‐Fe 2 O 3 ) has been done at 120 °C. Morphological study reveals the formation of spherical nanoparticles of average size ∼10 nm. The prepared electrode (Fe 2 O 3 dropcosted over graphite sheet) used as a working electrode for the oxygen evolution reaction in 1 M KOH. The linear sweep voltammetry confirms that the as‐prepared electrode requires 340 mV potential to reach a current density of 1 mA/cm 2 and 510 mV potential for 10 mA/cm 2 . Further, the kinetics of electrocatalyst has been investigated using Tafel slope, mass activity and Turn over frequency.