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A facile, green and environmentally‐friendly protocol for the preparation of ceria doped multi‐walled carbon nanotubes (2.5%CeO2/MWCNTs) composite catalysts are developed. The synthesized catalyst materials have been characterized by using P‐XRD, SEM, TEM and BET analysis. Further, the composite was utilized as a highly efficient and reusable heterogeneous nano‐catalyst for the synthesis of pyridine‐3‐carboxamide derivatives by multicomponent condensation of acetoacetanilide, ammonium acetate, substituted aromatic aldehyde and ethyl cyanoacetate via one‐pot reaction under ethanol solvent conditions at R.T. The remarkable advantages of this green protocol exhibits operational simplicity, easy workup procedure, inexpensive, evading of toxic solvents, shorter reaction times (≤ 15 mins), excellent yields and also avoidance of column chromatography. Furthermore, the catalyst was recyclable and reusability endured for a minimum of six consecutive cycles without significant loss in the catalytic activity.

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