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

For the synergistic catalysis of toluene and NO x , CeTiO x catalysts with metal organic frameworks as sacrificial templates, were synthesized using a hydrothermal method. The activity results show that use of the Ce 1 TiO x catalyst affords a synergistic catalytic efficiency of more than 75% between 250 and 400 °C. Characterizations confirmed that the Ce 1 TiO x 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 NH 3 and toluene exhibited competitive adsorption and competed with toluene intermediates for reactive oxygen species, inhibiting the synergistic catalytic reaction. • Ce 1 TiO x reaches more than 75% synergistic catalytic activity at 250–400 °C • Ti ions inhibit the oxidation of the catalyst and improve the acidic strength • In synergistic catalysis, NO promotes and NH 3 inhibits Toluene oxidation [ABSTRACT FROM AUTHOR]