2018 Volume 65 Issue 8 Pages 502-507
Fe3O4 catalysts were prepared on α- and γ-Al2O3 support powders by rotary chemical vapor deposition using ferrocene as an Fe precursor. The Fe content, microstructure and CO oxidation property of the Fe3O4/Al2O3 catalysts were investigated. Fe3O4 particles, less than 30 nm in diameter, surrounded by layers of carbon were precipitated on the α-Al2O3 support powder 10–20 μm in diameter. Faceted Fe3O4 particles several nm in diameter were precipitated on an α-Al2O3 support powder 40–50 nm in diameter, while minute Fe3O4 was deposited on a γ-Al2O3 support powder. The Fe content in the Fe3O4/Al2O3 catalysts ranged from 0.39–1.78 mass%. The Fe3O4/Al2O3 catalysts exhibited CO oxidation activities; the light-off temperature of the Fe3O4/γ-Al2O3 catalyst was 333 K and the oxidation of CO reached 100% at 553 K.
