Abstract
The Mn/Co mixed powders with various Mn/Co molar ratios were prepared by the coprecipitation method and used in low-temperature CO oxidation. The physicochemical characteristics of these powders were characterized using the Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), temperature-programmed reduction (TPR), and scanning electron microscopy (SEM) analyses. The results demonstrated that the Mn/Co molar ratio significantly affected both the textural and catalytic properties and the sample with a Mn/Co = 1:1 possessed a BET area of 123.7 m2g−1 with a small mean pore size of 6.44 nm. The catalytic results revealed that the pure cobalt and manganese catalysts possessed the low catalytic activity and the pure Co catalyst is not active at temperatures lower than 140 °C. The highest catalytic activity was observed for the catalyst with a Mn/Co = 1. The obtained results showed that the incorporation of Pd into the Mn/Co catalyst significantly enhanced the catalytic activity for oxidation of carbon monoxide and the highest CO conversion was observed for the catalyst with 1 wt.% Pd and this catalyst exhibited a CO conversion of 100% at 80 °C.
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The authors gratefully acknowledge the financial support received from the Iran National Science Foundation (INSF) under the grant number of 97017638.
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Ghiassee, M., Rezaei, M., Meshkani, F. et al. Preparation of the Mn/Co mixed oxide catalysts for low-temperature CO oxidation reaction. Environ Sci Pollut Res 28, 379–388 (2021). https://doi.org/10.1007/s11356-020-10484-x
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DOI: https://doi.org/10.1007/s11356-020-10484-x