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The CuO, CuMnO x and MnO x catalysts were anchored on the manganese oxide support with the structure of octahedral molecular sieves (OMS-2), which were synthesized using MnSO 4 and KMnO 4 as precursors by are flux method under acidic conditions, by an impregnation method and tested for CO oxidation. These catalysts and OMS-2 support were characterized by the advanced analyzations of X-ray diffraction and FTIR patterns; and SEM performances; and H 2 -TPR profiles. For CO oxidation reaction, CuO and CuMnO x catalysts showed extremely higher activities than that of MnO x catalyst and OMS-2 support. For the lowest temperature for 100% conversion of CO (T 100 ), the CuO and CuMnO x catalysts were observed at 55 o C and 65 o C, respectively. Due to the present of Cu 2+ – O 2− – Mn 4+ ↔ Cu + –□–Mn 3+ + O 2 redox couple in the structure of these solid catalyst. Additionally, the CuMnO x catalyst showed higher activity (~ 1.74 folds) and better stability than that of CuO catalyst in CO oxidation. Due to the advance functional of binary oxide structure of CuMnO x catalyst As known, CO oxidation may follow the Mars-van-Krevelen mechanism with Cu 2+ – O 2− – Mn 4+ ↔ Cu + –□–Mn 3+ + O 2 redox couple. This study shows the high applicating potential of CuMnO x /OMS-2 material in exhaust treatment for environmental safety.

Binary copper and manganese oxide nanoparticle supported oms-2 for enhancing activity and stability toward co oxidation reaction at low temperature