Facile synthesis of scheelite-type NdOsO₄ directly grown on carbon cloth for oxygen evolution reaction

In the recent work, the scheelite-type ABO₄compound (A = Nd and B = Os) is synthesized via a hydrothermal route directly grown on carbon cloth (NdOsO₄/CC). The as-obtained electrocatalysts are analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDXS), and Brunauer–Emmett–Teller (BET) to confirm the elemental, structural, morphological, and textural properties, respectively. The scheelite-type materials can easily regulate the oxygen evolution reaction (OER) owing to the presence of oxygen vacancy and high conductivity. Therefore, the fabricated material is employed for electrochemical studies utilizing electrochemical impedance spectroscopy (EIS), CV polarization curves, linear sweep voltammetry (LSV), and chronoamperometry (CA) in an alkaline medium and responds to low overpotential of 238.0 mV and small Tafel slope of 85.0 mV dec⁻¹ with the enduring stability of 20 h. In the current study, oxygen-deficient scheelite-type perovskites, such as ABO₄, appear to represent a novel class of high-performance electrocatalyst for processes involving active oxygen intermediates, like OER and oxygen reduction reaction (ORR) in future applications.