NO reduction by CO over TiO2 G Al2O3 supported In/Ag catalyst under lean burn conditions
Abstract TiO 2 /G Al 2 O 3 supported In/Ag catalysts were prepared by impregnation method, and investigated for NO reduction with CO as the reducing agent under lean burn conditions. The microscopic structure and surface properties of the catalysts were studied by N 2 adsorption desorption, X ray diffraction, transmission electron microscopy, X ray photoelectron spectroscopy, ultraviolet visible spectroscopy, H 2 temperature programmed reduction and Fourier transform infrared spectroscopy. TiO 2 /G Al 2 O 3 supported In/Ag is a good catalyst for the reduction of NO to N 2 It displayed high dispersion, large amounts of surface active components and high NO adsorption capacity, which gave good catalytic performance and stability for the reduction of NO with CO under lean burn conditions. The silver species stabilized and improved the dispersion of the indium species. The introduction of TiO 2 into the G Al 2 O 3 support promoted NO adsorption and improved the dispersion of the indium species and silver species.