Fabrication and catalytic properties of nanorod-shaped (Pt-Pd)/CeO2 composites

Nanorod-supported (Pt-Pd)/CeO2 catalysts were synthesized by a simple method of dealloying Al91.7Ce8 PtXPd0.3-X (X = 0, 0.075, 0.1, 0.15, 0.2, 0.3) alloy ribbons. SEM and TEM characterization implied that after calcination treatment, the achieved resultants exhibited interspersed nanorod structures with a rich distribution of nanopores. Catalytic tests showed that the (Pt-0.1-Pd-0.2)/CeO2 catalyst calcined at 300 degrees C exhibited the highest catalyst activity for CO oxidation when compared with other catalysts prepared at different noble metal ratios or calcined at other temperatures, whose complete reaction temperature was as low as 100 degrees C. The outstanding catalytic performance is ascribed to the stable framework structure, rich gas pathways and collaborative effect between the noble Pt and Pd bimetals.

Automated summary

Nanorod-supported (Pt-Pd)/CeO2 catalysts were synthesized by dealloying Al91.7Ce8 PtXPd0.3-X (X = 0, 0.075, 0.1, 0.15, 0.2, 0.3) alloy ribbons. SEM and TEM characterization showed that the resulting catalysts had interspersed nanorod structures with nanopores. The (Pt-0.1-Pd-0.2)/CeO2 catalyst calcined at 300 degrees C exhibited the highest activity for CO oxidation at a low temperature of 100 degrees C, attributed to its stable framework structure and collaborative effect of the noble Pt and Pd metals.