In situ FT-IR study and evaluation of toluene abatement in different plasma catalytic systems over metal oxides loaded γ-AL2O3

Silver and nickel based catalysts with gamma-Al2O3 support were synthesized via impregnation method for the removal of toluene in the presence of continuous discharge or adsorption-discharge plasma. An elaborate FT-IR analysis confirmed the formation of transient species during the plasma-catalytic oxidation of toluene. TOF-MS analysis indicated benzoic acid was not an important pathway of aromatic rings opening. NiO/Al2O3 catalyst displayed a higher enhancement of CO2 selectivity and ozone decomposition ability. Moreover, the active component (0 center dot and OH center dot) areas would increase during the discharge process in adsorption-discharge plasma system that were conducive to the removal of the organic byproducts. (C) 2016 Elsevier B.V. All rights reserved.