Abstract <p>In this research, the homogenous PdNPs were developed with varying weight percentages (1 to 4 wt %) on the CeO₂ support using a simple impregnation process with a mean size of 5 nm. Furthermore, homogenous PdNPs were examined for the selective oxidation of benzyl alcohol (BA) to benzaldehyde (BZA) in a solvent-free oxidation technique. The developed Pd/CeO₂ heterogeneous nanocatalysts were thoroughly studied utilizing various techniques such as P-XRD, TEM, and XPS analysis. Among various Pd loadings, 3 wt % (3Pd/CeO₂) catalysts exhibit enhanced catalytic activity for the BA to BZA oxidation process, with 9.5 times greater BA conversion than bare CeO₂. Additionally, experiments were conducted to determine the effect of temperature, catalyst weight, reaction time, and catalyst recyclability. The highest benzyl alcohol conversion (95%), benzaldehyde selectivity (99%) and benzaldehyde yield (94%) achieved for 3Pd/CeO_2. The 3Pd/CeO₂ catalyst not only exhibited superior catalytic activity, but also showed stable activity during recyclability.</p>