Synthesis of mixed Mn–Ce–Ox one dimensional nanostructures and their catalytic activity for CO oxidation.

One dimensional Mn–Ce–O x composite nanomaterials with various Mn contents were synthesized successfully by a hydrothermal method. The impacts of Mn contents on their morphologies and physical properties were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The analysis reveals that the obtained composites are one-dimensional (1D) rod-like nanostructures. The catalytic behaviors of Mn–Ce–O x nanomaterials were investigated for CO oxidation. The Mn–Ce–O x catalysts were found to be more active than catalysts based on ceria alone. The catalytic activities of all one dimensional Mn–Ce–O x materials for CO conversion are quite high (142< T 50% <229 °C). Among the obtained nanocatalysts, the Mn–Ce–O x composite nanomaterials with 40 wt% Mn exhibit the best catalytic activity and the 50% CO conversion can be reached at 142 °C. The presence of transition metal element Mn can promote the production of oxygen vacancies and improve oxygen mobility, which result in enhancing the oxygen-storage capacity of the one dimensional Mn–Ce–O x materials and its catalytic performance for CO conversion. [ABSTRACT FROM AUTHOR]