<p>One of the most difficult gases to convert in automobiles exhaust is propane (P), which has a substantial impact on an after–treatment system’s ability to minimize emissions. To catalytically totally oxidize propane, silver nanoparticles (AgNPs) with mass loadings ranging from 1 to 3 weight percent (0–3AgNPs/CeO₂) were embedded on CeO₂ support. Because AgNPs and CeO₂ support have a strong metal support relationship, the dispersion of AgNPs on CeO₂ support significantly facilitates the reducibility of Ce (Ce⁴⁺ to Ce³⁺) and increases oxygen vacancies on the oxygen sublattice of Ce. With regard to the propane oxidation reaction, the 2Wt.% AgNPs loaded CeO₂ catalyst (2AgNPs/CeO₂) shows the maximum propane conversion (<i>X</i>_P), the lowest T₉₀ (temperature required to degrade 90% of P), the lowest T₅₀ (The required temperature to degrade 50% of P), and Ea(lowest activation energy).These benefits result in an excellent efficiency on Ag/CeO₂ when propane is completely oxidized at low temperatures.This study will provide a thorough understanding of the electronic&#xa0;relationships between the metal and the active surface of supports, which will aid in the development of more effective exhaust catalysts.</p>