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Global Warming and environment distresses due to increases in CO2 emission generated more interest towards CO production and further value added chemical liquids. In this paper, two step redox thermochemical thermal reduction (TR) and CO₂ splitting (CS) was performed over doped ceria by combination of two metal cations namely Ag and Ln (where, Ln =La, Pr, Nd, Sm, Gd, Tb, Dy, Er). Ce_0.9Ln_0.05Ag_0.05O_2-δ material was prepared via co-precipitation of hydroxide method with 30% aqueous NH₃. The power XRD and SEM of prepared nanoparticle Ce_0.9Ln_0.05Ag_0.05O_2-δ were performed after calcination. In comparison to pure CeO₂ and Ce_0.9Ln_0.1O_2-δ, investigated Ce_0.9Ln_0.05Ag_0.05O_2-δ during both TR at 1400°C and CS at 1000°C showed with enhanced redox performance ( , ) with the inclusion of noble metal Ag⁺² cation as third dopant_.