Abstract: Cu/OMS-2 catalysts were prepared with different methods，and their catalytic performance was investigated for the oxidation of toluene. The catalytic activity was revealed as sequence below： OMS-2 > Cu/OMS-2（ion exchange method）> Cu/OMS-2（pretreatment method）. It was found that OMS-2 had best catalytic performance；it achieved 90% toluene conversion at 225 ℃ due to the better reducibility. The material characterization results showed the addition of Cu reduced the Mn³⁺/Mn⁴⁺ electron pairs on the surface of OMS-2 catalyst，it reduced the reducibility and oxygen mobility on the surface of OMS-2 catalyst，which led to the decrease of catalytic performance of Cu/OMS-2 compared with OMS-2.

Key words: Cu/OMS-2, catalytic oxidation, toluene, redox pairs, VOCs