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Issue 15, 2018
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Improved durability of Co3O4 particles supported on SmMn2O5 for methane combustion

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Abstract

To eliminate the aggregation of Co3O4 in the methane combustion process at high temperature, a thermally stable mullite structure, SmMn2O5 (SMO), was utilized as a support to improve the catalytic durability of Co3O4 particles. In detail, Co/SMO composite catalysts were prepared using the deposition–precipitation method with distinct Co/SMO nominal weight ratios of 5%, 30% and 50%. Later, their methane combustion performances under an oxygen-rich atmosphere were evaluated and compared. Meanwhile, their physical and chemical properties were characterized by XRD, Raman spectroscopy, the BET method, SEM, HRTEM, XPS, H2-TPR and O2-TPD. H2-TPR and O2-TPD results illustrated that the Co/SMO-50% catalyst showed the highest reducibility and it enhanced the mobility of oxygen species. As a result, the Co/SMO-50% sample exhibited the highest CH4 combustion catalytic activity among all the composite catalysts. Specifically, the T10, T50, and T90 for methane combustion were measured to be 334 °C, 390 °C, and 437 °C, very similar to those of Co3O4 catalyst. At the same time, the Co/SMO-50% catalyst showed improved durability, better performance after recycling, thermal aging and long-term experiments when compared to the Co3O4 catalyst.

Graphical abstract: Improved durability of Co3O4 particles supported on SmMn2O5 for methane combustion

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Publication details

The article was received on 03 May 2018, accepted on 27 Jun 2018 and first published on 27 Jun 2018


Article type: Paper
DOI: 10.1039/C8CY00897C
Citation: Catal. Sci. Technol., 2018,8, 3785-3794

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    Improved durability of Co3O4 particles supported on SmMn2O5 for methane combustion

    Z. Feng, C. Du, Y. Chen, Y. Lang, Y. Zhao, K. Cho, R. Chen and B. Shan, Catal. Sci. Technol., 2018, 8, 3785
    DOI: 10.1039/C8CY00897C

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