One-step preparation of graphitic carbon nitride/Polyaniline/Palladium nanoparticles based nanohybrid composite modified electrode for efficient methanol electro-oxidation

•Simple one-step fabrication of novel nanohybrid composite by electro-co-deposition.•Graphitic carbon nitride/Polyaniline/Palladium nanoparticles nanohybrid composite.•g-C3N4/PANI/PdNPs nanohybrid composite modified ASPE.•Superior electro-oxidation and excellent catalytic performance over methanol oxidation.•Potential electrocatalyst material for the direct methanol fuel cell applications.