Synthesis and characterization of Pt/Fe-Zr catalysts for the CO selective oxidation

▶ Pt/Fe2O3 and Pt/FexZr(1−x)O2 catalysts were prepared for selective CO + H2 oxidation. ▶ X-ray and Mössbauer showed solid solution and segregated mixed oxides with phases. ▶ Zr4+ substitute Fe3+ ions in the lattice and Fe3+ diffuse in the zirconia lattice. ▶ Catalytic tests showed maximum CO conversion and total oxygen conversion. ▶ Interfacial Fe3+/Pt° sites improve the oxidation either for CO and H2 oxidation.