Abstract
In this investigation, Mn-doped CeO2(CM) catalysts were prepared by co-precipitation (CP), sol-gel (SG), and hydrothermal (HT) methods and characterized by XRD, ICP-OES, N2 adsorption–desorption, SEM, TEM-HREM, Raman, XPS, FT-IR, XPS and H2-TPR techniques, and evaluated for CO oxidation activity. The CM catalyst obtained by HT method showed superior CO oxidation performance at much lower temperature (T50 = ~355 K). The better performance of CM-HT catalyst is ascribed to its larger surface area, higher concentration of surface adsorbed oxygen, enhanced reducibility, and more oxygen vacancy sites. Further, it was found that the CM-HT catalyst is fully recyclable for over four runs while maintaining its high activity, which suggests that it is a better catalyst for CO oxidation at lower temperatures.
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Acknowledgments
We greatly acknowledge Prof. Dr. W. Grünert, Ruhr University Bochum, Germany for providing CO oxidation results. PV and DM thank Council of Scientific and Industrial Research (CSIR), and United Grant Commission (UGC), New Delhi for the Senior and Junior Research Fellowships respectively. DJ thanks IICT-RMIT Joint Research Centre for the award of Junior Research Fellowship. Financial support was received from the Department of Science and Technology, New Delhi, under SERB Scheme (SB/S1/PC-106/2012).
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Venkataswamy, P., Jampaiah, D., Mukherjee, D. et al. Mn-doped Ceria Solid Solutions for CO Oxidation at Lower Temperatures. Catal Lett 146, 2105–2118 (2016). https://doi.org/10.1007/s10562-016-1811-9
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DOI: https://doi.org/10.1007/s10562-016-1811-9