Application of CeTiOx-MOFs catalysts for synergistic removal of toluene and NOx

Abstract

For the synergistic catalysis of toluene and NOx, CeTiOx catalysts with metal organic frameworks as sacrificial templates, were synthesized using a hydrothermal method. The activity results show that use of the Ce1TiOx catalyst affords a synergistic catalytic efficiency of more than 75% between 250 and 400 °C. Characterizations confirmed that the Ce1TiOx catalyst balanced the catalytic reduction reaction by reducing the concentration of Ce3+ and increasing the Lewis acid content, resulting in, an excellent synergistic catalytic activity. The mechanistic study revealed that NH3 and toluene exhibited competitive adsorption and competed with toluene intermediates for reactive oxygen species, inhibiting the synergistic catalytic reaction.