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In this study, mixed oxides of Mn-Cu and Fe-Cu on OMS-2 support having an octahedral structure were synthesized by the refluxing and impregnation methods. The characteristics of the materials were analyzed by XRD, FTIR, SEM, EDX, and H 2 -TPR. In the CO oxidation test, CuFeO  x  /OMS-2 had slightly higher catalytic activity but is significantly more stable than CuMnO  x  /OMS-2 and CuO/OMS-2. Due to its lower reduction temperature in H 2 -TPR analysis, the Mars-Van-Krevelen mechanism for CuFeO  x  /OMS-2 (Cu 2+ –O–Fe 3+  ↔ Cu + –□–Fe 2+ ) could take place more energetically than CuO/OMS-2 and CuMnO  x  /OMS-2 (Cu 2+ –O 2− –Mn 4+  ↔ Cu + –□–Mn 3+ ). In addition, the interaction between Fe and Cu in the catalyst could improve the durability of the surface oxides structure in comparison with that between Mn and Cu. With the high specific rate and TOF of 28.6 mmol/h.g and 0.508, respectively, CuFeO  x  /OMS-2 has a great potential as an effective catalyst for low-temperature oxidation application in CO and possible VOCs removal.

Enhancing the Activity and Stability of CuO/OMS-2 Catalyst for CO Oxidation at Low Temperature by Modification with Metal Oxides