Please use this identifier to cite or link to this item: https://dspace.ctu.edu.vn/jspui/handle/123456789/55874
Title: Binary copper and manganese oxide nanoparticles supported OMS-2 for enhancing activity and stability toward co-oxidation reaction at low temperature
Authors: Nguyen, Trung Thanh
Nguyen, Thi Quynh Anh
Keywords: Binary oxide catalyst structure
Manganese oxide octahedral molecular sieves
Low temperature CO oxidation; Advanced CuO/OMS-2 catalyst
Mars-van-Krevelen mechanism
Issue Date: 2018
Series/Report no.: Vietnam Journal of Science and Technology;Vol. 56, No. 06 .- P.741–750
Abstract: CuO, CuMnOx and MnOx catalysts were anchored on the manganese oxide support with the structure of octahedral molecular sieves (OMS-2), which were synthesized using MnSO₄ and KMnO₄ as precursors by refluxing under acidic conditions or impregnation. The catalysts were then tested for CO oxidation. These catalysts and OMS-2 support were characterized by X-ray diffraction, FTIR, SEM, and H2-TPR. For CO oxidation reaction, CuO and CuMnOx, catalysts showed extremely higher activities than that of MnOx, catalyst and OMS-2 support. The 100% conversion of CO (T100) for the CuO and CuMnOx, catalysts were observed at 55°C and 65°C, respectively. Due to the presence of Cu²⁺ − O²ˉ − Mn⁴⁺ ↔ Cu⁺ −□− Mn³⁺ + O₂ the redox couple in the structure of these solid catalyst. Additionally, the CuMnOx, catalyst showed higher activity (~1.74 folds) and exhibited better stability than CuO catalyst in CO oxidation, due to the advanced functionallity of binary oxide structure of CuMnOx, catalyst. As known, CO oxidation may follow the Mars-van-Krevelen mechanism with Cu²⁺ − O²ˉ − Mn⁴⁺ ↔ Cu⁺ −□− Mn³⁺ + O₂ redox couple. This study shows the high application potential of CuMnOx/OMS-2 material in treatment of CO.
URI: https://dspace.ctu.edu.vn/jspui/handle/123456789/55874
ISSN: 2525-2518
Appears in Collections:Vietnam journal of science and technology

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