Facile Hydrothermal Synthesis and Characterization of NdCoO₃@Nd₂O₃/rGO Hybrid for Electrochemical Sensing of Alpha‐Lipoic Acid and Supercapacitor Application

Abstract The present study reports a facile, simple, and eco‐friendly hydrothermal method of preparation of nanocomposite material, NdCoO 3 @Nd 2 O 3 ‐rGO, and its utility as an electrochemical sensor and energy storage device. The synthesized NdCoO 3 @Nd 2 O 3 ‐rGO nanocomposite was investigated in terms of structural and morphological characteristics. The electrochemical sensing performance of the reported material was tested by analyzing an antioxidant, α‐lipoic acid (ALA), in pharmaceutical formulations and biological samples. The sensing capability of demonstrated material was noticed to be improved by 28‐fold when compared to that at bare glassy carbon electrode. Good linearity was observed between the peak current and concentration of ALA in the range of (0.05–20.92) × 10 −6 mol/L and (0.02–28.06) × 10 −6 mol/L for DPV and SWV methods, respectively. Further, the electrochemical energy storage ability of NdCoO 3 @Nd 2 O 3 ‐rGO was also investigated. For this, NdCoO 3 @Nd 2 O 3 ‐rGO was fabricated over NF for supercapacitor application. The NdCoO 3 @Nd 2 O 3 ‐rGO/NF electrode showed good super capacitive properties with a specific capacitance of 1502.22 F/g at a current density of 1 A/g in 1 M KOH electrolyte. The electrode showed good cycling stability with a retention of 78.0% after 5000 cycles.