Search

-x/carbon nanotubes (CNTs) catalysts were firstly prepared via simple incipient wetness method and used for low-temperature selective catalytic reduction (SCR) of with 3. The structure and surface properties of the catalysts were characterized by 2 sorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction by hydrogen (2-TPR). It was found that -x/CNTs catalyst exhibited excellent low-temperature SCR activity and 2 resistance. XRD patterns revealed that metal oxides catalysts were possessed of amorphous structure. FESEM and TEM images showed that metal oxides catalysts were successfully supported on CNTs. The XPS results indicated that the obtained catalyst presented high 4+/3+ and OS/(OS + OL) ratios. The 2-TPR profiles showed that -x/CNTs catalyst possessed better low-temperature reducibility. Besides, the obtained catalyst exhibited better 2 resistance. Highly active Mn-FeOx/CNTs catalysts were first synthesized by incipient wetness method and applied in low-temperature NO reduction with NH3. The as-obtained catalysts showed excellent low-temperature SCR activity. Thereinto, the 1.2% Mn-FeOx/CNTs catalyst presented the first-rate catalytic activity at 80-180°C, which benefited from its amorphous phase, high Mn4+/Mn3+ and OS/(OS+OL) ratios. [ABSTRACT FROM AUTHOR]

-x/carbon nanotubes (CNTs) catalysts were firstly prepared via simple incipient wetness method and used for low-temperature selective catalytic reduction (SCR) of with 3. The structure and surface properties of the catalysts were characterized by 2 sorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction by hydrogen (2-TPR). It was found that -x/CNTs catalyst exhibited excellent low-temperature SCR activity and 2 resistance. XRD patterns revealed that metal oxides catalysts were possessed of amorphous structure. FESEM and TEM images showed that metal oxides catalysts were successfully supported on CNTs. The XPS results indicated that the obtained catalyst presented high 4+/3+ and OS/(OS + OL) ratios. The 2-TPR profiles showed that -x/CNTs catalyst possessed better low-temperature reducibility. Besides, the obtained catalyst exhibited better 2 resistance. Highly active Mn-FeOx/CNTs catalysts were first synthesized by incipient wetness method and applied in low-temperature NO reduction with NH3. The as-obtained catalysts showed excellent low-temperature SCR activity. Thereinto, the 1.2% Mn-FeOx/CNTs catalyst presented the first-rate catalytic activity at 80-180°C, which benefited from its amorphous phase, high Mn4+/Mn3+ and OS/(OS+OL) ratios. [ABSTRACT FROM AUTHOR]