Abstract
In this study, 3V5W/Cu@Ti catalyst with the function of reaction site-isolation was prepared to achieve the simultaneous removal of NO and toluene. The catalyst was prepared through the hard template and impregnation method, and V-W, and Cu species were introduced into the outer and inner layers of the hollow spherical shell TiO2, respectively. Under the coexistence of multi-pollutants, toluene was completely removed with NO conversions above 90 % at 250 ℃. Even at high temperatures of 350–400 ℃, complete conversions of NO and toluene were maintained with apparent lower by-products than those for other catalysts. DFT calculations and activation energy(Ea) indicate that NH3 tends to adsorb and react at the V/W sites on the catalyst's outer layer, while toluene is more likely to adsorb and react at the Cu sites on the inner layer. The Ea and DFT results were well-consistent with the catalytic reactivity, revealing the achievement of reaction site-isolation.
Published Version
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