The fabrication of efficient and affordable nanomaterials is the bottleneck in the advancement of energy conversion/storage technologies. This study presents the synthesis and performance assessment of a novel hybrid nanostructure comprising LDH-calcinated Ternary Mixed Metal Oxide (3MMO) nanoflakes, incorporated on multi-doped (Nitrogen and single atom cobalt) Reduced Graphene Oxide (CoNG), as a ptoficient electrocatalyst for Oxygen Reduction Reaction (ORR) in an alkaline environment. The synthesized nanocomposites underwent a comprehensive analysis and discussion, employing several physicochemical and electrochemical characterization methods. The physiochemical analyses collectively affirmed the successful incorporation of the 3MMO onto the CoNG lattice forming a mesoporous structure. In terms of electrochemical characterization, the 3MMO-CoNG nanocomposite displayed the most favorable electrochemical attributes, including an onset potential of −0.04 V vs. Ag/AgCl, an electron transfer number of 3.8, remarkable current retention (85 %) after an extended period of 18000 s, and the lowest charge transfer resistance (29 Ω) among the synthesized samples. The synergistic interaction between the 3MMO nanoparticles and the CoNG lattice contributes to the improved electrochemical performance of 3MMO-CoNG. The results of this investigation demonstrate that the developed catalyst displays exceptional electrochemical performance, rivaling the most effective catalysts documented in existing literature.