Abstract
The catalytic CO oxidation reaction has been investigated over a series of Mn/TiO2 catalysts. The titanium dioxides, including several mesoporous structures were prepared by different synthesis procedures. The mesoporous TiO2 synthesized using evaporation-induced self-assembly (EISA) method exhibited the highest surface area (217.14 m2/g). The successful loading of the active manganese component (2 %) to TiO2 supports showed high dispersion of MnO x species in amorphous state. Characterizations of XRD, N2 adsorption–desorption, pore size distributions, TEM, H2-TPR and XPS were applied to contrast their structure properties and correlated with the corresponding catalytic performance. The Mn/EISA exhibited the highest catalytic activity among the series of Mn/TiO2 catalysts, which could completely oxidize CO into CO2 at temperature as low as 270 oC, due to its highly ordered mesoporous channels, which effectively enlarge the surface area leading to promoting a strong interaction between MnO x species (68 % Mn3+) and TiO2 support.
Highlights
Exhaust gas treatment has been the focus of current research for a wide array of applications
The Mn/evaporation-induced self-assembly (EISA) exhibited the highest catalytic activity among the series of Mn/TiO2 catalysts, which could completely oxidize CO into CO2 at temperature as low as 270 oC, due to its highly ordered mesoporous channels, which effectively enlarge the surface area leading to promoting a strong interaction between MnOx species (68 % Mn3?) and TiO2 support
Yue et al [17] mentioned that the crystal phase and mesoporous structure of TiO2 highly dependent on the calcination temperature thence TiO2 supports made in the temperature range of 350–800 °C showed different diffraction peaks
Summary
Exhaust gas treatment has been the focus of current research for a wide array of applications. The successful loading of the active manganese component (2 %) to TiO2 supports showed high dispersion of MnOx species in amorphous state.
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