One-pot electro-co-deposition of nanospherical polydiphenylamine-palladium–supported graphitic carbon nitride nanohybrid for efficient methanol oxidation

In this work, a novel co-deposited nano spherical polydiphenylamine-palladium supported graphitic carbon nitride (GCN/PDPA/Pd NS) nanohybrid was fabricated via the in-situ one-pot electrochemical co-deposition method. The GCN/PDPA/Pd NS nanohybrid electrode was characterized by morphology studies, which found that the average diameter of the PDPA/Pd nanospherical size is 250 nm over the graphitic carbon nitride nano matrix as well as elemental composition, structural and vibrational spectra also observed through FESEM, EDX, Mapping, and XRD, FT-IR studies. The electrochemical characterizations of the GCN/PDPA/Pd NS electrocatalyst were studied using cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopic techniques. The fabricated GCN/PDPA/Pd NS–modified electrode shows significant electrocatalytic activity, lower oxidation potential (− 0.15 V), high stability, and longevity (1800s) towards methanol oxidation reaction (MOR) in an alkaline medium. The fabricated GCN/PDPA/Pd NS electrocatalyst is a significant anode catalyst for the direct methanol fuel cell application. Graphical abstract